Abstract: A septic tank having internal supports. The internal supports may be lateral or vertical supports integrally molded to the septic tank. The internal supports provide structural support for the septic tank under various loading conditions. The supports will thus substantially prevent cracking of the septic tank, as well as deformation of the septic tank, manhole and other components thereof. A mold for manufacturing the septic tank is also provided.

Abstract: An apparatus and method for treatment of waste water effluent includes a main conduit connected to a source of waste water, and a removable filter positioned within the main conduit, the filter comprising a light weight particulate material for filtration of the effluent. A drain field for filtration treatment of waste water effluent comprises a source of waste water effluent, a main conduit in fluid connection with the source of waste water, and at least one in-line filter positioned within the main conduit, the filter comprising light weight particulate material. The drain field may comprise at least one extension conduit connected in fluid communication with the main conduit and extending substantially upwardly therefrom, said extension conduit having a removable cap comprising a sensor to thereby generate a signal when water in said extension conduit reaches a predetermined level.

Abstract: A source of sewage is coupled to a septic tank by an influent line. The outlet line is coupled to a sewage treatment plant by an outlet line. Sewage travels from the source to the septic tank where solid matter is filtered. Liquid matter passes through the septic tank into the outlet line where it transported to the sewage treatment plant to be treated. The outlet line may consist of an indefinite number of intermediary lines and valves, such as an effluent line adjacent to the septic tank, a distribution line adjacent to the sewage treatment plant, and a valve disposed in between the effluent line and the distribution line. The valve may be coupled to a leach field so that liquid matter traveling from the effluent line to the valve may be directed either to the leach field or the distribution line leading to the sewage treatment plant.

Abstract: A filtering apparatus of T-shaped configuration includes a vertically extending filter element receiving tube and a horizontally extending outlet conduit portion. A removable tubular filtering element having a flexible seal surrounding the outer surface of the filter element at a lower end is engagable with an inner surface of the filter element receiving tube. A stationary filter element is disposed at a juncture of the outlet conduit with a central opening in the vertically extending filter element receiving tube wherein the flexible seal of the filter engages with and cleans the particulates from the stationary filter element upon insertion and removal of the tubular filtering element from the filter element receiving portion.

Abstract: A device of three-chamber type for purifying liquid in a cup-shaped vessel (17, 18) has an inlet tube (20) for the liquid at a certain level and an outlet tube (21) at a lower level than the inlet tube. The vessel is vertically divided by a substantially horizontal distribution disc (14) below the inlet and outlet tubes. The disc has at least one opening (19) and is provided with a substantially vertical distribution pipe (15) for receiving the liquid from the inlet tube (20). A first sedimentation chamber (A) is formed below the lower end of the distribution pipe (15), a second chamber (B) is formed over the lower end of the distribution pipe (15) and below the distribution disc (14) and a third chamber (C) is formed over the distribution disc (14).

Abstract: The present invention is a compact water dispersal system located on an outdoor ground site. The system includes a water treatment system resulting in treated water with an organic loading of less than about 20 ppm and a suspended solids concentration of less than about 20 ppm. The water flows from the water treatment system to an interior discharge pipe having a plurality of perforations. Through the perforations, the water flows into an exterior discharge pipe surrounding the interior discharge pipe, the exterior discharge pipe also having a plurality of perforations. The exterior discharge pipe is surrounded by a layer of wicking material. A volume of fill material surrounds the interior discharge pipe, the exterior discharge pipe, and the layer of wicking material, thereby dispersing the water therefrom.

Abstract: A filter for filtering particulate matter from liquids adapted to be received in a filter casing having a casing wall and an outlet is provided. The filter includes a filter element having a plurality of openings therein for filtering particulate matter while allowing liquids to pass therethrough, the filter element comprising a first section located proximate to the outlet and a second section adjacent to the first section. The filter element is receivable in the casing and is spaced apart therefrom such that the filter element and the casing wall define a space therebetween. A seal separates the first and second sections and prevents the flow of liquid therearound in the space. The seal is located below the outlet. A lower end member closes a lower end of the filter element, the lower end member preventing the flow of unfiltered liquid and particulate matter into the filter element.

Abstract: An exemplary embodiment of the invention includes a wastewater treatment plant having, in serial fluid flow relationship, a wastewater source, a wastewater treatment plant, and a discharge site. The wastewater treatment plant has, in serial fluid flow relationship, an aerobic bioreactor in fluid flow communication with the wastewater source and an anoxic bioreactor in fluid flow communication with the discharge site. Fixed film packing for growing microbes is disposed in first and second tanks of the first and second bioreactors, respectively. A primary holding tank is disposed between the wastewater source and the aerobic bioreactor. A first pump is used for pumping liquid out of the primary hold tank through a first pressure line into the first tank to a pressure line outlet in a bottom of the first tank.

Abstract: A water treatment facility and method for treating effluents incorporating an input filter for removing bacterial contamination. The filter utilizes pipe and tube systems for distribution and drainage, which extend from both the inlet and outlets, which face each other at a spaced distance, and contain lengthwise perforations with filtration equipment therebetween. The water treatment apparatus utilizes a septic tank which includes a barrier, a waste water delivery pipe, an evacuation pipe for clean water, equipment for decantation of the heaviest matter at the bottom of the barrier and the surface accumulation of grease and light particles, anaerobic fermentation of the entrapped material, and protective equipment arranged to prevent plugging.

Abstract: An apparatus and method for treatment of waste water effluent includes a main conduit connected to a source of waste water, and a removable filter positioned within the main conduit, the filter having a light weight particulate material for filtration of the effluent. A drain field for filtration treatment of waste water effluent includes a source of waste water effluent, a main conduit in fluid connection with the source of waste water, and at least one in-line filter positioned within the main conduit, the filter having a light weight particulate material. The drain field may include at least one extension conduit connected in fluid communication with the main conduit and extending substantially upwardly therefrom, the extension conduit having a removable cap and a sensor to thereby generate a signal when water in the extension conduit reaches a predetermined level.

Abstract: The present invention relates to a compact, environmentally benign onsite waste water treatment and disposal system installed secondary to conventional primary treatment process. It is a method and apparatus for the biological purification and natural disposal of liquid wastes using a secondary single pass trickling filter in conjunction with an evapotranspiration absorption (ETA) tertiary disposal bed.

Abstract: A vadose zone for a leaching field which enables the construction of a leaching field in terrain where conventional leaching fields cannot be constructed. Such terrain also comprise areas where a high water table exists or where percolation tests fail. The vadose zone is constructed adjacent to the leaching field which is buried in a layer of soil which has been constructed over a nonporous barrier such as a plastic sheet or ledge or clay. The effluent from the leaching field is forced to move sideways out of the leaching field into the adjacent soil. The adjacent soil becomes a vadose zone to complete treating the effluent. The effluent is forced to flow through a prescribed predetermined distance through the vadose zone before it is permitted to disperse through the soil toward the water table or over the clay or ledge.

Abstract: A waste water filter comprises a shield comprising a vertical peripheral wall defining a shield interior. The shield further includes an inlet for the entry of unfiltered wastewater into the shield interior. A shield filter element is disposed within the shield interior. The shield filter element includes at least one filter surface having filter surface openings for the passage of relatively clear water while restricting the passage of solids larger than the openings. The shield filter element, when disposed within the shield, separates the shield interior into first and second interior locations. Unfiltered or partially filtered waste water in the first interior location is separated from filtered waste water in the second location by the shield filter element. The shield filter element is removable from the shield. Unfiltered or partially filtered waste water entering the shield interior after shield filter element removal will enter the first and second interior locations within the shield.

Abstract: The Three Stage Sewage Treatment Plant is an uniquely designed three stage sewage waste water cleaning device for use in homes and other buildings which are not attached to municipal sewer systems. It employs both aerobic and anaerobic microorganisms to break down sewage, in addition to gravity separation of solids from the effluent. The cleaning process is centered around a cylindrical aerobic tank which is divided into an inner and an outer chamber by a funnel shaped clarifier. In the outer chamber of the aerobic tank, air droplines aerate the sewage, promoting the aerobic microorganisms that break down the sewage, and create turbulence. In the inner chamber, the sewage is gravity separated, such that solid particles are extracted from a cleaned effluent. The device is comprised of a pre-treatment tank, which screens out solid particles and allows for the preliminary anaerobic cleaning process, and a post-treatment tank, where the effluent is chlorinated and stored, in addition to the aerobic tank.

Abstract: A liquid-handling installation utilizes an upstream and a downstream separator unit, each unit having a horizontal partition defining a treatment compartment below the partition and an overflow compartment above the partition. Each unit has an inlet opening and an outlet opening. Two conduits communicate the outlet opening of the upstream unit with the inlet opening of the downstream unit.

Abstract: A filter and housing for waste water treatment includes a housing having a plurality of coaxially mounted vertically extending sections adaptable to receive a filter cartridge therein. An upper section is provided with an outlet consisting of at least two coaxially aligned rings of preselected diameters wherein the thickness of the rings and the spacing between the rings is sufficient to receive waste water treatment outlets of different diameters. The filter cartridge is comprised of a stacked arrangement of a plurality of disc-dam units wherein each disc-dam unit is provided with a serpentine configured first dam, the first dam extending upwardly from an upper surface of the disc-dam unit, the first dam having terminating ends spaced at outer terminating edges of the disc dam unit to define a cord segment therebetween. The terminating ends are connected by a second dam having a height less than the first dam.

Abstract: A two-piece filtering device for wastewater filtering systems is disclosed wherein the two-piece system is inserted into a tubular casing. The two-piece filtering system is comprised of an outer sleeve filter and an inner primary filter, the primary filter extending downwardly through an opening in the bottom portion of the sleeve filter and also having an opening formed in its end. After insertion into the tubular casing, the two-piece filtering system of the present invention forces effluent or other fluid to be treated upward through the interior of the primary filter, through slots formed in and subsequently through the sidewall of the sleeve filter. Thus, only treated effluent flows outward through the tubular casing outlet opening. The slots may be formed in both the sidewall of the primary filter and the sleeve filter. A seal may be provided between sidewall lower portion of the primary filter and may extend to the internal sidewall of the tubular casing to prevent untreated effluent therebetween.

Abstract: A filtering system for filtering effluent in a septic tank including an outer secondary filter secured within a pipe fitting, wherein the outer secondary filter includes a central opening passing therethrough; an inner primary filter, wherein the inner primary filter is slidingly engaged within the central opening in the outer secondary filter; and a filtering connection element, secured between the outer secondary filter and an inner surface of the pipe fitting, wherein the filtering connection element filters effluent passing upward through the filter pipe fitting and wherein upon removal of the inner primary filter, the outer secondary filter filters the effluent entering the pipe fitting before discharge. Either or both of the outer secondary filter or the inner primary filter may be formed with a biocide to retard the growth of biological material on their surfaces.

Abstract: A septic tank structure having first and second lower tank members and a cover member supported on and forming a seal with respective upper ends of the tank members. The tank members each have a closed lower end, an open upper end, and side walls extending between the lower and upper ends to form a receptacle for receiving waste materials. The tank members have respective flat sides that extend in a substantially vertical plane and are placed together when the tank structure is assembled. The upper ends of the assembled tank members define an outer periphery having an oval shape. The cover member has a lower periphery, a manhole opening, and a steeply sloped wall portion extending between the lower periphery and the manhole opening. The lower periphery of the cover member has an oval shape that corresponds to the oval shape of the upper ends of the assembled tank members. A channel-shaped configuration on the lower periphery of the cover member enhances the seal between the cover member and the tank members.

Abstract: A residence (13) discharges its waste water into a septic tank (10). A pump (18) draws waste from the tank's liquid layer and feeds it to a distiller (22) as distiller feed. The distiller (22) divides the distiller feed into distillate and distiller residue. The distiller residue is returned to the septic tank (10), whereas the distillate is reused or discharged into a leach field. In either case, the adverse environmental effects of leach-field use are largely eliminated.

Abstract: An effluent filter for septic tanks and the like has substantially horizontal filtering levels provided in a stepped arrangement on both an inlet side and an outlet side of the effluent filter. The effluent filter provides an array of both substantially horizontal and vertical filtering slits through which effluent must pass to reach the outlet side and exit the septic system. Particles in the effluent must navigate tortuous paths created by the array of filtering slits and are trapped by these filtering slits, rather than being allowed to exit the septic system with the filtered effluent. The effluent filter is flexible and is further provided with integral external flexible wiper blades that serve to improve a friction fit between the effluent filter and an associated T baffle, sanitary T baffle, or other pipe component, as well as prevent particles in the effluent from circumventing the effluent filter.

Abstract: A filtration and subsurface distribution system having a vaulted splitting device (e.g., dosing vault) in a recirculating pump tank. The recirculating pump tank houses a sand filter pump and the dosing vault houses a dosing pump. The dosing vault and the dosing pump may be housed outside and remote from the recirculating pump tank which ensures that effluent will not be mixed within the dosing vault. The sand filter pump doses a sand filter with the septic effluent via a feed line. The effluent is then filtered by the sand filter and returned to the dosing vault via a filtrate return. When the filtrate reaches a certain predetermined level within the dosing vault, the drip pump is enabled and turned “on”. In this manner, the filtrate is dosed or dripped into a drain absorption field without mixing with the septic effluent.

Abstract: A filter and housing for waste water treatment includes a housing having a plurality of coaxially mounted vertically extending sections adaptable to receive a filter cartridge therein. An upper section is provided with an outlet consisting of at least two coaxially aligned rings of preselected diameters wherein the thickness of the rings and the spacing between the rings is sufficient to receive waste water treatment outlets of different diameters. The filter cartridge is comprised of a stacked arrangement of a plurality of disc-dam units wherein each disc-dam unit is provided with a serpentine configured first dam, the first dam extending upwardly from an upper surface of the disc-dam unit, the first dam having terminating ends spaced at outer terminating edges of the disc dam unit to define a cord segment therebetween. The terminating ends are connected by a second dam having a height less than the first dam.

Abstract: The apparatus for UV wastewater purification in septic tank systems has an ozone free ultraviolet lamp disposed in PVC piping buried in the ground and located between the septic tank and the drainfield. The PVC piping includes a water inlet and an outlet connected by a U-shaped section of piping. The UV lamp is housed in a quartz tube, or in an alternative embodiment, in a Teflon tube, and placed in a cylindrical insert having a plurality of ports defined in the walls of the cylinder. The insert is placed in a vertically oriented leg of the U-shaped piping at the water outlet, the wastewater flowing through the insert parallel to the ultraviolet lamp. Access to the UV lamp for maintenance is provided by a vertically oriented riser pipe buried in the ground and having a length corresponding to the desired depth of the apparatus, the riser housing the electrical wiring and having a cap at ground level.

Abstract: A water-tight fiberglass septic tank is strong enough to withstand live loads. The fiberglass septic tank is preferably designed with integral ribs to for structural strength. In one preferred embodiment, the tank is made in two unequal halves. The lower half comprises the major portion of the tank and includes a bottom, two endwalls and two sidewalls. The upper half comprises a cover. This arrangement allows the horizontal seam to be placed above the internal waterline, thereby protecting the seam from exposure to sewage. At least one of the endwalls includes a raised top portion that allows a pipe to be located near the top of the lower portion without passing through the seam between the upper and lower portions of the tank. The endwalls are also curved to allow for angled inlet and outlet pipe connections. The ribs are preferably internal and hollow. The lower portion of the tank is also preferably flat bottomed. A provision has been made for a self-locating baffle if required.

Abstract: A water-tight fiberglass septic tank is strong enough to withstand live loads. The fiberglass septic tank is preferably designed with integral ribs to for structural strength. In one preferred embodiment, the tank is made in two unequal halves. The lower half comprises the major portion of the tank and includes a bottom, two endwalls and two sidewalls. The upper half comprises a cover. This arrangement allows the horizontal seam to be placed above the internal waterline, thereby protecting the seam from exposure to sewage. At least one of the endwalls includes a raised top portion that allows a pipe to be located near the top of the lower portion without passing through the seam between the upper and lower portions of the tank. The endwalls are also curved to allow for angled inlet and outlet pipe connections. The ribs are preferably internal and hollow. The lower portion of the tank is also preferably flat bottomed. A provision has been made for a self-locating baffle if required.

Abstract: A septic tank effluent filter includes a housing positioned external to and downstream a septic tank for receiving the effluent prior to it being released into a drainfield positioned downstream the housing. The housing includes an inlet port and an offset outlet ports on an opposing wall for connection between the septic tank and drainfield. A cylindrical container is carried within the housing and is connected directly to the outlet port for having the effluent flow from within the housing through the uniformly perforated cylindrical wall of the container to outlet port. A circular base plate of the container provides a baffle and prevents the undesirable direct streaming of the effluent from the inlet port to the outlet port. A plastic mesh bag is filled with polystyrene plastic beads having a large surface to volume ratio, thus a large surface area within a desirable space.

Abstract: A sludge gauge for measuring the depth of a sludge layer covering a bottom of a septic tank. The sludge gauge has a guide sleeve mountable through a septic tank cover and a probe, at least an upper end of which is slidably received in the guide sleeve. The probe has a base end distal an upper end. The density and base end configuration of the probe are selected to cause the probe to sink through a liquid layer in the septic tank until the base end settles on the sludge layer when the probe is released from a raised position. A cap is securable over an upper end of the guide sleeve and a collapsible connector extends between the cap and the probe for raising the probe into the raised position. An indicator is attached to the cap for indicating a height of the base end of the probe above the bottom of the septic tank thereby indicating sludge depth in the tank.

Abstract: Water from a septic tank is aerated, at an above-ground aeration station. The aerated water is infiltrated onto the floor of a trench in the ground through drainage holes in a pipe. The pipe is pressurized with water during dosing. The pipe is arranged to sag down between support posts, whereby water drains completely out of the pipe between dosings, evenly along the length of the pipe.

Abstract: The invention describes a filter container, system and method for filtering sewage effluent from a septic tank. The filter container includes a body having a lower end and an upper end, having walls forming a floor positioned at the lower end and sides connected to the floor and positioned to define an inner cavity extending from the lower end to the upper end. The body of the container has a mouth opening positioned at the upper end to provide access to the inner cavity. A lid is positioned on the upper end of the body so as to cover the mouth cavity to thereby close the container. A plurality of pipes connect the container in fluid communication with the septic tank or with another container, the plurality of pipes including at least one inlet pipe for delivering sewage effluent to the inner cavity and at least one outlet pipe for discharging filtered sewage effluent from the inner cavity.

Abstract: A system is described for improving separation of sewage containing wastewater, oleaginous materials and solids. The system includes a tank 10 having a first chamber 12 and a second chamber 14. In the first chamber oleaginous materials rise to an upper portion thereof and a grinder pump 30 grinds the solids that descend toward the bottom of the first chamber. The second chamber in communication with the first chamber delivers the sewage to a discharge line 24 in communication with a transport line that leads to a downstream sewage treatment plant. A conduit 32 conducts the slurry of the ground solids from the first chamber to the discharge line. A pressure relief line 40 running from the conduit releases the head pressure into the first chamber. The pressure relief line is connected to the conduit downstream of the conduit's highest point of elevation.

Abstract: A laminar flow collar for use with an effluent pump in a septic system. The laminar flow collar is a cylinder having a closed bottom and an open top portion. The laminar flow collar includes a plurality of holes drilled about the periphery of the cylinder at a certain distance from the bottom. The laminar flow collar sits on the bottom of the tank and the plurality of holes are positioned at a certain height from the bottom of the septic tank and below the surface of the effluent so as not to draw in “scum” floating on the top of the septic tank. The plurality of holes are engineered to match the pump flow so that flow into the collar is laminar, thereby avoiding turbulence in the tank which would otherwise stir up the sludge at the bottom of the tank. The effluent pump is inserted into a second cylinder which is placed within the laminar flow collar.

Abstract: Effluent from a septic tank is trickled through a first filter canister. The thus filtered effluent is recycled a plurality of times through the same filter canister, further to cleanse the effluent. A small portion of the recycling effluent is directed outward into a drip irrigation system. A second filter canister, not in line with the first canister, also receives some of the recycling, filtered effluent, for plural recycles therethrough, to enhance the filtering process, at the same time that other of the filtered effluent is being recycled through the first filter canister. The filtered effluent from the two canisters are permitted to combine prior to subsequent recycling.

Abstract: An apparatus for controlling liquid flow from a holding vessel to a discharge line wherein insoluble material received into the vessel with liquid is intended to be retained in the vessel. The apparatus comprises wall means within which an interior cavity is defined for connection to the discharge line at a location below the surface of liquid in the vessel, apertures spaced along the wall means for admitting liquid from the vessel into the cavity, wall elements between the apertures providing inclined confronting ramps between which pockets are provided such that the liquid therein is relatively quiescent to facilitate movement upwardly of buoyant components of the insoluble material to be deflected by the superior ramp towards the top of the vessel and movement downwardly of non-buoyant components of the insoluble material to be deflected by the inferior ramp towards the bottom of the vessel.

Abstract: A wastewater filtration system with a housing provided by a cylindrical conduit forming a filter chamber and having an inlet end and an outlet. A shutoff valve assembly is connected to an inlet end of the housing, and includes a closure element movable between an open position and a closed position. The closure element is biased to the closed position in the absence of a filter in the chamber and positioned near the inlet such that the shutoff valve opens when a filter is installed. The closure element may be hinged to the housing, and may be counterweighted or spring biased to the closed position.

Abstract: A system for pumping effluent out of a septic tank contains an electric pump unit disposed coaxially within a tube. A rotary self-cleaning strainer has a cylindrical filter screen that filters certain solid material from the effluent flow through the tube upstream of the pump inlet port. Effluent is conveyed out of the septic tank through a pipe connected to the pump outlet port. A portion of the pumped effluent is conveyed to one or more nozzles arranged to wash the filter screen. In certain embodiments, the cylindrical screen is stationary and the nozzles rotate, while in other embodiments, the nozzles are stationary and the screen rotates. Depending on particular embodiment, the nozzles may be either inside or outside the screen. Effluent flow through the screen is opposite the direction of spray from the nozzles.

Abstract: A two stage alarm system for detecting rising levels of sludge in septic tanks, and similar sedimentary tanks. The system, to detect a first or “caution” level, and a second or “critical” level of sludge, relies upon a pair of vertically positioned weight sensitive switching mechanisms which, when triggered by the rising levels of sludge, will send appropriate signals to a remote alarm mechanism, such as at the residence, to activate a “yellow” and/or “red” light, for example, thus alerting the owner of the tank to the need for remedial action.

Abstract: The waste water treatment system comprises a waste water treatment facility having an inlet for the entry of waste water and an outlet, and a re-circulation tank including an inlet and an outlet. The inlet of the waste water treatment facility is in fluid communication with the outlet of the re-circulation tank. The system includes a distribution chamber including an upstanding wall, a floor, an inlet, and at least two outlets conduits. A first outlet conduit is in fluid communication with the re-circulation tank; and a second outlet conduit is in fluid communication with a discharge conduit. At least one flow distribution chamber outlet conduit typically includes an inlet opening which is disposed at the same vertical height as the floor of the distribution chamber to allow the entry of waste water which has entered into the distribution chamber, such that substantially no waste water entering into the distribution chamber through the inlet will be retained within the chamber.

Abstract: The Three Stage Sewage Treatment System (“TSSTS”) processes sewage for buildings not connected to a municipal sewer system. It employs a three stage process for cleaning sewage in a single, light-weight, easy-to-install unit. Sewage is initially cleaned anaerobically in the pre-treatment tank as gravity acts to separate solids from the effluent. Sewage then flows into the aerobic tank for further cleaning by aerobic microorganisms and continued gravity separation of solid contaminants from the effluent. The aerobic tank is divided into an inner chamber and an outer chamber by a funnel-shaped clarifier. In the TSSTS, the clarifier is a separate piece with a lip around the top of the funnel-shaped main body. The lip of the clarifier rests atop the sidewalls of the aerobic tank, and the clarifier hangs down in the aerobic tank, with an opening in the bottom of the clarifier held above the bottom of the aerobic tank.

Abstract: A sub-soil wastewater treatment vessel, especially for wastewater produced by single family residences and small businesses and the like. The vessel is divided into at least three contiguous chambers by at least two transverse walls, forming at least two contiguous aeration chambers and a clarifier chamber. Wastewater flows into the first aeration chamber via an influent line, thence through an opening in the first transverse wall into the second aeration chamber. From there, wastewater flows through passages at the bottom of the second transverse wall into the clarifier chamber. Air is supplied to the first and second aeration chambers via low pressure diffuser lines. Three inclined surfaces within the clarifier chamber direct solids through passages in the second transverse wall back into the second aeration chamber for further processing. An effluent line connected to the clarifier chamber permits wastewater outflow.

Abstract: A septic system filter apparatus for filtering waste water as it travels from a septic tank to a septic field. The septic system filter apparatus includes a filtering system for filtering water from a septic tank for receiving waste material. A filtering apparatus comprises a first housing having a bottom wall and a top wall. The top wall is a removable lid. The first housing has a first inlet port and an exit port. The bottom wall has at least two supports thereon extending upward from an inner surface of the bottom wall. A second housing for holding filtering material has a removable lid thereon. The second housing has dimensions smaller than the first housing to fit into the first housing. A space is defined between the first housing and the second housing. The second housing rests on the supports above the inner surface of the bottom wall. The second housing has a second inlet port located generally adjacent to the first inlet port. The second housing has an upper chamber and lower chamber.