Abstract: A washer fluid delivery system includes a washer fluid reservoir having a first zone with a first low point and a second zone with a second low point. A first valve is disposed in the first zone. The first valve is moveable back and forth between a flow permitting position and a flow restricting position in response to an amount of washer fluid within the first zone. A second valve is disposed in the second zone. The second valve is moveable back and forth between a flow permitting position and a flow restricting position in response to an amount of washer fluid within the second zone. A pump operates to draw a washer fluid from the first zone when the first valve is in the flow permitting position, and to draw a washer fluid from the second zone when the second valve is in the flow permitting position.

Abstract: A drain assembly for a sink has an abutment surface (14) for abutting an underside of the sink around the drain aperture, and a first wall portion (16) circumscribing an upper drain volume (18). A down-flow conduit (20) and an up-flow conduit (24) are delineated by a second and third wall portions (22, 26), one of which has an edge defining a lip (28) between the down-flow conduit (20) and up-flow conduit (24). An outlet (30) is connected to up-flow conduit (24). A removable lower cover (32) attaches to the wall portions so as to complete a flow path from the down-flow conduit (20) to the up-flow conduit (24) so as to form a trap. At least the first, second and third wall portions (16, 22, 26) and the outlet (30) are integrally formed as a unitary body, most preferably by an injection molding process.

Abstract: A device for adjustment of pressure in tires includes a chamber with shape memory and a valve. The valve is a three-way valve with inputs interconnected with the external environment and the tire internal space. One input is fitted with a valve, the next input is connected to one end of the chamber with shape memory, and the last input is interconnected with the closure element. The device includes the chamber with shape memory interconnected with the external environment through an input and with the tire chamber through an output and fitted with at least one valve. The length of the chamber in the direction of tire rotation equals 0.001 to 0.5 times the tire perimeter, where the volume of the chamber before deformation to volume of the chamber during deformation ratio is the same or higher than the desired tire pressure to pressure of the external environment ratio.

Abstract: An automatically skimmable tank for removing oil from water. A water inlet with a 90 degree elbow that is turned sideways and points slight upward causes flow to first impinge on the wall of the tank then flow upward helically around the tank's internal diameter (ID) to maximize retention time so that oil separates from the water. At the tank's upper fluid level, the water flows to the center of the tank, then spirals downward to the bottom and under the incoming fluid flow before exiting via the water outlet. Oil is removed from the tank via an upwardly extending oil outlet riser provided with two horizontal anti-vortex plates. A level transmitter senses the oil-gas and the oil-water interfaces and a programmed PLC activates an oil valve and a low shear oil transfer pump to remove oil from the tank when the oil layer surrounds the anti-vortex plates.

Abstract: A urine collection and drainage device and system adapted to facilitate drainage for patients to that prefer to stay standing during drainage and avoid removal of clothing near the collection bag. A collection vessel is designed to be secured to a user's waist and leg and allows for quick drainage with low initial compression. Drainage can also be accomplished for handicapped patients that have challenges getting out of bed or a wheelchair.

Abstract: A cleaner for the inside of a water tank utilizing a siphoning action is provided, in which the interior of a water passage (24) between an upstream-side one-way valve (Vu) and a downstream-side one-way valve (Vd) is pressurized or depressurized by a pressing operation of a suction operation tool (A) provided in a bent connecting part between a main body portion (1) and a grip portion (2) of a suction pipe (P), and water-tank water of the main body portion (1) is sucked into the suction pipe (P). This enables waste material such as leftover food within water-tank water to be sucked up together with dirty water by a very simple operation.

Abstract: A stormwater gully comprises a chamber in which an outlet assembly is installed. The outlet assembly comprises filter units connected to an outlet housing. In use, stormwater can flow from the chamber in an upwards direction through filter units into the outlet housing. The outlet housing has an outlet, which extends from the gully. At high rates of flow, the water level in the chamber will rise until water can flow into the outlet housing through bypass inlets. The bypass inlets are connected to the interior of the housing by siphons defined by arched regions of a top cover. The siphons allow rapid discharge of water until the water level returns below the level of the bypass inlets. A slow drain down feature is provided which enables the chamber and outlet assembly to be drained below the level of the primary inlet.

Abstract: A stormwater gully comprises a chamber in which an outlet assembly is installed. The outlet assembly comprises filter units connected to an outlet housing. In use, stormwater can flow from the chamber in an upwards direction through filter units into the outlet housing. The outlet housing has an outlet, which extends from the gully. At high rates of flow, the water level in the chamber will rise until water can flow into the outlet housing through bypass inlets. The bypass inlets are connected to the interior of the housing by siphons defined by arched regions of a top cover. The siphons allow rapid discharge of water until the water level returns below the level of the bypass inlets. A slow drain down feature is provided which enables the chamber and outlet assembly to be drained below the level of the primary inlet.

Abstract: A syphon filtration system is a low head, small foot print, long operating cycle, gravity filtration system for treatment of water and wastewater, with one-stage or two-stage filtration in one vessel with different filtration media of sand, anthracite, granular activated carbon or other proprietary filtration media. The one-stage filtration system removes suspended solids or dissolved impurities and the two-stage filtration system removes suspended solids and dissolved impurities. In the two-stage filtration system, each filtration stage can be backwashed independently or both stages can be backwashed simultaneously. Novel syphon piping and controls design extend the filtration operating cycle and reduce the filter apparatus headroom, and the filter backwash water volume requirements.

Abstract: The invention relates to a fuel system of a portable handheld work apparatus driven by an internal combustion engine. The fuel system includes a fuel tank (2), a fuel pump, a fuel line (4) leading from the fuel tank (2) to the fuel pump and a first suction head (5) which is disposed at an end (7) of the fuel line (4) at the fuel tank. At least a second suction head (6) is arranged within the fuel tank (2) and is connected in the fuel line (4) in series ahead of the first suction head (5). The second suction head (6) has an external suction surface which is formed by a porous covering (9). The porous covering (9) delimits a suction space. A guide is arranged in the suction space which guides the through-passing fuel flow at least approximately along the entire inner surface of the porous covering (9).

Abstract: The sludge treatment system is comprised of a dam passage penetrated through a dam (D); an induction pipe (11) for discharging a sediment retained by the dam (D) and having an inlet (11a) toward the floor of the dam (D) and an outlet connected to an inner end of the dam passage; an induction force action pipe (13) connected to an outer end of the dam passage and extended in a height for utilizing an atmospheric pressure as an induction force of the sediment; a U shape air control pipe (14) connected to the induction force action pipe (13), and preventing for an air from coming into the induction force action pipe (13); a drain pipe (15) connected to the air control pipe (14) for discharging the sediment; and an air vent pipe (16) connected to a horizontal flat portion of the air control pipe (14) for dissipating the induction action of both the air control pipe (14) and the drain pipe (15).

Abstract: The system comprises one or more of the following: primary treatment units, flexible pipes, and optionally, one or more pumps. The system is designed and installed in a manner that enables the flow of liquid to be predominantly due to gravity, although one or more pumps may optionally be included at key positions. The system can be sealed and pressure tested in order for optimal performance to be achieved during operation.

Abstract: A sample preparation device for reducing a concentration of one or more concomitant components of a sample and/or increasing a concentration of one or more desired sample components is described.

Abstract: A co-extruded tubing for the administration of intravenous fluids has an outer layer of a polyester. An inner fluid-contact layer may be of a polyethylene or of a thermoplastic polyurethane. Where the inner fluid-contact layer is of polyethylene, an intermediate tie layer of ethylene-vinyl acetate copolymer may be included to prevent delamination.

Abstract: A substantially clog-resistant self-supporting fluid filter 100 for attachment to an open end of flow tube 118. Filter 100 comprises a substantially cylindrically shaped grid or fluid intake portion 102 having first end 112 and a second end 116. Fluid intake portion 102 comprises a plurality of substantially parallel longitudinal ribs 106 affixed to a plurality of substantially parallel circular ribs 108 at an angle to longitudinal ribs 106 thereby allowing a fluid to flow therebetween while preventing passage of debris intermixed with the fluid. Longitudinal ribs 106 and circular ribs 108 are substantially rigid such that they cooperate to be structurally self-supporting. End cover 114 is affixed to first end 112. Filter 100 further comprises tube receiving portion 104, which is affixed to or integral with second end 116 and is configured such that flow tube 118 engages tube receiving portion 104 in a secure, slidable manner.

Abstract: A siphon to be used when removing water from a personal aquarium for cleaning purposes. The water passes through propellers or flaps of a present friction, which monitor the volume flowing out of the aquarium. The amount of water is displayed on an exterior gauge so the user may achieve accuracy. Appropriate filtering media is provided to insure that small particles such as rocks and gravel do not injure the internal parts of the device.

Abstract: A refrigerant connection includes a ferrule positioned within a threaded nut. The threaded nut is received on a connector body. A seal is positioned between the ferrule and the connector body. As the nut is turned on the connector body, the ferrule squeezes the seal. The seal is cylindrical such that sealing surfaces are provided at each axial end and at an outer periphery. In this way, the seal is not as sensitive to surface imperfections in the various components as was the case in the prior art.

Abstract: An oil from water separator has an oil disengagement chamber adapted to receive an oil and water mixture and retain it for a sufficient time in a relatively undisturbed state so that oil in the mixture floats to the top of the mixture. This results in a substantially oil free volume of water having a layer of oil derived from said oil and water mixture floating on the surface of the mixture. The oil disengagement chamber is partially separated from an effluent water chamber by an under flow baffle which ducts said substantially oil free volume of water to the effluent water chamber. The oil disengagement chamber has a low liquid level which is higher than the under flow baffle. The outflow of the substantially oil free volume of water from the effluent water chamber is limited to a rate of outflow which is a function of the head of the liquid in the effluent water chamber.

Abstract: A filter assembly is provided that includes a hood, a drain manifold, a filter disposed between the hood and the drain manifold, a drainage space that is disposed between and in fluid communication with both the filter medium and the drain manifold, a check valve that is configured to permit air to escape but not to enter the drainage space so that a siphon can be established that draws additional fluid through the filter medium and into the drain manifold, the siphon continuing until air entering the hood disrupts the siphon, and a check valve cap that is configured to permit air to escape the check valve while preserving an air-filled void above the check valve when the filter assembly is submerged.

Abstract: A fluid leak capture and drainage system for ceiling leaks which includes a ceiling panel support grid and a plurality of ceiling panels mounted thereon is disclosed. The ceiling panel has a raised platform located in the center of the panel and a wall extending along the periphery of the panel so that a perimeter trough is formed between the platform and the wall. The wall has a top edge and a rim extending outwardly and generally perpendicularly from the top edge of the wall and at least one opening formed through the wall. A fitting is connected to the opening and tubing is attached to the fitting for draining the trough as fluid collects therein.

Abstract: The present invention is a liquid transport member with significantly improved liquid handling capability, which has at least one bulk region and a wall region that completely circumscribes said bulk region, and which comprises a membrane port region and an open port region, whereby the bulk region has an average fluid permeability kb which is higher than the average fluid permeability kp of the membrane port region.

Abstract: A substantially clog-resistant self-supporting fluid filter for attachment to a discharge tube or the like, comprising a cylindrically shaped grid open at both ends, having a first plurality of substantially parallel ribs crossed by and fastened to a second plurality of substantially parallel ribs at an angle to the first plurality of ribs. Spaces or apertures formed between each adjacent pair of parallel ribs provides passage for liquids to be filtered there through. A circular shaped stop member or snap-on cap having raised radial spacers or lugs is attached to one end of the filter, and prevents the end of the discharge tube slidably inserted into the filter from hitting the top surface of the snap-on cap. Snap-on cap has clips on the outer diameter of the top surface that securely attach the cap to the filter. The fluid filter further comprises a snap-on nipple insert for sealingly engaging the discharge tube and attaching the discharge tube to the filter.

Abstract: A filter for a carpet cleaning device and method for using therefor includes a casing and a partition that extends into the casing to define a primary chamber and a secondary chamber within the casing. A main siphon with an inverted U-shape is mounted in the partition. One end of the siphon extends into the primary chamber while the other end of the siphon extends into the secondary chamber. An auxiliary siphon is located within the secondary chamber, and a pump is attached in fluid communication with the auxiliary siphon. During operation, a wastewater/debris stream is transported into the filter. The stream collects in the primary chamber and establishes a primary fluid level therein. As the primary fluid level rises, carpet fibers and other insoluble debris settle in the primary chamber. Once the primary fluid level is even with the siphon, wastewater fluid is transported from the primary chamber to the secondary chamber and establishes a secondary fluid level therein.

Abstract: A self-priming siphon has an inverted U-shaped tube filled with a hydrophilic material where one end of the tube is connected to a smaller diameter tube such that when the other end of the tube is immersed in a liquid, capillary action causes the fluid to rise in the tube above the level of the water and thereafter fall through said one tube end causing a suction which primes the siphon.

Abstract: A system for controlling a flow of water out of a container in a manner to prevent the generation of noise as an incident to the outflow and to permit adjustment of the water level in the container, the container being a component of apparatus for maintaining water at a desired level in an enclosure. The system basically includes: an outflow conduit defining an outlet flow path via which water flows downwardly out of the container, the conduit having an upper end located within the container and having an inlet opening; a cap overlying the inlet opening and defining with the conduit upper end an annular flow path via which water flows to the inlet opening; and a vent tube extending vertically downwardly through the cap and into the conduit to establish an air flow path between a region above water in the container and a region within the conduit.

Abstract: A two piece suction strainer for use with a centrifugal pump is provided. The strainer includes a cage having the form of a basket and a cover having an integral hub formed as a hose shank fitting. The cover is securely placed in the open end of the cage basket. The hose is directly attached onto the hub. The cage and the cover preferably are injection molded from a high impact plastic.

Abstract: A ring float floating in the surface of the ballast liquid is arranged around a pump housing with suction port submerged in a ballast tank. The ring float runs around the pump housing and will form a barrier which prevents a contaminating layer on the liquid surface from being drawn in through the suction port, said barrier preventing the contaminating layer from reaching the port before the suction port loses its suction effect as result of it taking in air.

Abstract: A closed feeding system for liquid fuel includes a flexible tube (1) extending from a reservoir (7) to a strainer housing (8) for differential pressure feeding of fuel, provided with pump assembly (3), in which system there is disposed a second, flexible tube (2) for return of fuel to the reservoir (7), the feed tube upstream and downstream of the pump assembly (3) being provided with non-return valves (4'-5') for flowing toward the strainer housing (8) and the return tube (2) optionally being provided with a non-return valve (6') for flowing toward the reservoir.

Abstract: An apparatus for creating surges in an aquarium uses a pump to move water from the aquarium into an external tank. A siphon tube periodically creates surges by draining water from the tank back into the aquarium. The siphon tube has an inlet at a predetermined elevation within the tank, an outlet for discharging water from the tank into a smaller secondary basin, and an intermediate high point at an elevation above the inlet. The secondary basin has a series of water dispersion outlets that allow the surge to discharge into the aquarium. The siphon tube allows water to surge from the tank into the secondary basin and thence back into the aquarium when the water level in the tank rises above the high point of the siphon. The surge continues until the water level falls below the inlet to the siphon. The pump continues to pump water from the aquarium into the tank at a relatively constant rate throughout this entire process, but at a lower flow rate than can be drained by the siphon tube.

Abstract: Apparatus for use in draining, cleaning and refilling an aquarium tank including an elongated flexible hose having first and second opposite ends, a tube including an upper distal end for connection to the first end of the flexible hose, and a lower distal end adapted to be immersed in the aquarium tank such that the lower end may be placed near the bottom of the aquarium tank, a first device attachable to the second end of the flexible hose and for connection to a flowing water source for creating a flow of water from the tank through the tube and the flexible hose, and a grille, defined by a chamber and including a plurality of apertures formed in the walls thereof that are narrower than the width of the gravel particles, the grille and chamber attached to the lower distal end of the tube for contact with the gravel for moving the gravel about the floor of the tank such that the gravel particles are forced by the movement to bump and rub against each other outside the tube to dislodge the sediment and impur

Abstract: Siphon freeze drain valve for an underground water sprinkling system including a line operating under water pressure, the drain valve being a U-shaped tube, one end of which is passed through a hole in the top of the line, the other end of which is outside the line at a lower level than the first end. A clamp and a seal holds the tube in the line against the force of the water in the line and prevents leaking around the tube. A check valve is in the end of the tube outside the line, the check valve selectively opened and closed to control flow through the tube and for establishing a siphon for draining the line.

Abstract: The low flow irrigation system can be used for batch or continuous time-dependent watering. It takes the form of a reservoir tank with a screen basket which filters out large particles from the water coming into the system. A float valve shuts off and turns on the intake water to preserve a predetermined level of water. Once the tank is filled initially, a siphon is started to begin flow into the standpipe, then into the distributor header. From there water flows through holes into plant water tubes and out to the plant clusters. All of the openings in the system allow for finely suspended matter to flow through so that waste water may be used. This system allows for easy adjustment of flow rates, while solving the water loss problems by limiting the area wet and eliminating the spray. The results are low water and energy usage, along with efficient plant nutrient application with minimal ground water pollution.

Abstract: An automatic prime and flush siphon condensate pump system (100) is provided for displacing condensate water accumulated from an air conditioning evaporator to a drain, such as the drain of a basin (50). Initially, the pump assembly (2) displaces the condensate from the reservoir (1) responsive to the closure of a switch (34) when the condensate level exceeds a predetermined height within reservoir (1). The pump outlet (128) is coupled to the inlet of a pilot operated check valve assembly (3) which is opened responsive to the pressure in the valve chamber (28) exceeding the bias force of the compression spring (33) and a fluid pressure in a reference chamber (29). The pumped condensate exits the pilot operated check valve assembly (3) and is fluidly coupled to the ball-type check valve housing (126) for delivery of the condensate to the passage (18) for fluid coupling with the drain conduit (52).

Abstract: A siphon structure includes a hose having an inlet housing whose cylindrical side wall includes a lower portion formed of a mesh web, with the mesh web having openings and the openings including further intersecting filaments therebetween to minimize siphoning force against the inlet cylinder, having a cylinder diameter greater than a siphon tube diameter of the organization preventing drawing of fish thereagainst during siphoning of an associated aquarium.

Abstract: An air induction control device for an internal combustion engine comprises means defining a communication passageway for communicating between air at atmospheric pressure and the air in the downstream passageway from a throttle valve. A valve member is disposed in the communciation passageway and is moveable toward the downstream direction thereof to open the communication passageway in response to an atmospheric pressure greater than pressure in the downstream passageway. A valve biasing means is disposed to apply force to and bias the valve member in the upstream direction to close the communication passageway in response to the pressure differential between atmospheric pressure and the air pressure in the downstream passageway. A flow restriction element positioned downstream of the valve member comprises calibrated openings defining a primary chamber and secondary chamber, wherein the volumetric proportion of the primary chamber:second chamber:calibrated openings is about 50-70:25-35:0.0-1.2.

Abstract: A siphon head for siphoning smooth or rough textured roof surfaces which is preferably comprised of a soft pliable elastomeric material such as rubber. The head includes a relatively flat foot flange adapted to rest flatwise on a roof to be drained. The flange is of an annular shape. A dome shaped head portion is centrally located and integrally formed with the relatively flat foot flange. The relatively flat foot flange extends outwardly in a relatively flat plane beyond the head portion and surrounds the head portion in all directions. The head portion is closed on its top side and has an interior cavity. An opening is located on an underside of the head portion in communication with the cavity for receiving fluids to be siphoned. A discharge nozzle is positioned in fluid receiving communication with the interior cavity and extends radially away from the head portion atop the foot flange.

Abstract: A separator for oil well production fluids including oil, water and gases in which the separator includes a water siphon system having a vertically adjustable spill point for the discharge of water to a collection or disposal area for changing the interface level between the water in the bottom of the separator tank and the oil on top of the water in the separator tank. The separator is primarily constructed of a non-corrosive, non-conductive, high impact plastic with the siphon system and standpipe being positioned internally of the separator tank to reduce damage caused by high winds damaging such components by blowing down the separator which may have been weakened by corrosion with this arrangement also reducing the possibility of water in the siphon and standpipe being frozen which can occur when these components are oriented externally of the tank.

Abstract: A dump truck has a tiltable dump body with a tailgate at its rear end. A partition or weir mounted in the dump body and of lesser height than the walls of the dump body divides the dump body into front and rear compartments. A siphon is connected between the two compartments and extends over the partition. The rear compartment, having a discharge opening at its rear end which is closed by a tailgate, receives dredged material in the form of a mixture of water and sand (or silt) pumped thereinto through a supply conduit on the dump body. As the rear compartment is being filled with dredged material, gravity causes the sand (silt) to settle at the bottom and the water to rise to the top and spill over the partition into the front compartment. Some water also flows through the sipon into the front compartment.

Abstract: A device for separating liquids from solids and solids from solids is provided by utilizing a tall column filled with liquid which is subjected to a siphon action that pulls the liquid/solids mixture vertically through the column clarifying the liquid and classifying the solids. This siphon method provides a most efficient method of classification of solids and clarification of liquids. Atmospheric pressure and gravity create forces within the device which simultaneously act on every particle. The interior of the tall column has no moving parts.

Abstract: A float controlled siphon discharge valve mechanism operates to drain water from a swimming pool cover, and includes a lever arm attached at one end to a hinge and having a float on the other end so that the lever is of the second or third type. A closure control is also included to sense for the presence of water immediately adjacent to the drain opening, and includes a spring loaded control arm connected to the lever arm to force the lever arm into a drain occluding position even if the float does not move that lever arm into such a position in order to ensure that the siphon is not broken even in the event that the float operation malfunctions.

Abstract: A temperature actuated drain system is provided that comprises a siphon that has an inlet end for immersing in a pool of water to be drained from a roof surface and a discharge end communicating with a pressure-responsive one-way valve. A solar actuated enclosed chamber that contains a solar heat energy collector is located on the roof surface and is in open communication with the siphon by means of a tubular member that has its inlet end positioned closely adjacent the bottom of the interior of the chamber. The arrangement causes any appreciable amounts of water that accumulate within the chamber to be discharged from the chamber during the pumping action created by the heating and cooling of air within the chamber.

Abstract: Apparatus for siphoning liquid such as water which accumulates in a ponding area (16) located on a flat roof (12) to a drain (14) is disclosed. The apparatus includes a first liquid conduit (21) which has one end (58) in the accumulated water and a second end (52) in drain (14). A reservoir (26) (64) accumulates a selected volume of water which is transferred from the reservoir (26) (64) by a second liquid conduit (38) to the first liquid conduit (21) such that the first liquid conduit (21) is completely filled with water suitable for initiating siphoning action of the water in ponding area (16) to drain (14). A means for controlling the flow of liquid from reservoir (26) (64) to first conduit (21) such as float valve (36) is included such that there is no transfer of liquid from reservoir 26 to first liquid conduit 21 until the selected volume of water has accumulated.

Abstract: A coupling for filling and draining a waterbed comprises a tube for insertion into the male-threaded filler neck of a waterbed valve, and two female-threaded nuts rotatably mounted on the tube for connection to a garden hose and the male-threaded fill neck of the waterbed. There is a plurality of fill and drain openings through the wall of the portion of the tube inserted into the fill neck.

Abstract: A waste trap for collecting solid wastes in a drain system connectable at a fitting to a drain pipe. The trap includes a removable receptacle which is disposable or houses a disposable insert when the trap is full. A siphon is associated with the trap to draw down the liquid level to facilitate removal of the receptacle.

Abstract: An apparatus for removing water from a ponding area of a flat roof having a run-off system which is no longer operable to drain water from the ponding area which comprises a structure for directing a quantity of the run-off water flowing in the run-off system as a result of the commencement of a rain condition or the like into a priming chamber, a structure for displacing water from the priming chamber back into the run-off system in such a way as to establish a negative pressure condition within the priming chamber, and a structure for communicating the negative pressure condition to an end of a siphon hose at a vertical level below the level of the ponding area, the other inlet end of which is disposed in water sucking relation to the ponding area to thereby prime the siphon hose and commence the flow of water from the ponding area which flow after the cessation of the rain condition or the like continues until the water is substantially removed from the ponding area.

Abstract: A siphon system in which an enclosed container has a chamber for heating a gaseous fluid as by solar radiation. The chamber is in continuous open communication with a siphon having an inlet at an upper level and an outlet at a lower level. A pressure responsive valve is located at the outlet for permitting the release of gaseous fluid at pressures over atmosphere and closing the outlet to communicate pressures below atmosphere to the inlet to start the siphon. When the siphon is filled, the pressure responsive valve opens to release the liquid from the outlet. A float valve may be used at the inlet to retain a below atmospheric pressure in the system for immediate operation when the liquid accumulates at the inlet.

Abstract: An automatic flushing device for an evaporative cooling system contains a water sump, circulating pump, and float-operated water makeup source. A small, adjustable portion of the return flow enters a separate timing reservoir. When the timing reservoir is full, water from the well and the sump are flushed from the system through a siphon tube which communicates with both chambers.

Abstract: A check valve for substantially preventing fluid flow in a first direction, but allowing a substantially unrestricted fluid flow in a second, opposite direction, the check valve including a tubular body and a flapper valve hingedly disposed within the tubular body so that the flapper valve, which is formed from a diagonally-cut section of tubing, may substantially block the tube by sealing its cut edges against a first inner wall portion of the tubular body and so that its cut edges may also lie substantially flush along a second inner wall portion of the tubular body allowing for substantially unimpeded fluid flow.

Abstract: An elongated tube is bent to have a central portion, a short leg and a long leg. The long leg is closed by a cap which is counterbalanced into the closed position. An elongated inner tube having an outer upper end passes through the sidewall of the long leg and terminates a substantial distance down in the long leg of the outer tube. The outer end of the inner tube is covered by a conventional bulb air pump. Squeezing the air pump pushes a pulse of air out the lower end and creates a vacuum when the cap is closed to begin siphoning through the short leg.