Abstract: A water sewer drainage system particularly directed to prevent spread of West Nile disease includes an underground water drain off region, a ground level opening to a down passage to the drain off region, a sewer grate across the ground level opening and an insect block in the down passage below the sewer grate. The insect block inhibits insects from gaining access to the drain off region while permitting flow of water through the system.

Abstract: A drain device for draining flat roofs, balconies, terraces or other flat structures, has an inflow body provided with a collar rim. When the inflow body is mounted, the collar rim lies on the surface of the roof. A loose flange can be introduced into the inflow body. The flange also has a collar rim. A connector film can be tensed between the collar rims of the inflow body and the loose flange for establishing a tight connection of a covering layer between said two elements. In order to allow for abnormally large amounts of water to be drained, the inflow body is provided with a cavity, into which two drain pipes and lead. One of the drain pipes co-operates with a pressurized, i.e., a pumped drainage system, and the other one of the drain pipes cooperates with a free-flowing drainage system.

Abstract: A surface water runoff filtration device comprises an intake which is adapted to receive storm water and other surface water runoff. The surface water runoff flows from the surface through the intake to a point below the filter media, and then up toward the surface through the filter media. This device may be used in both catch basin storm drains and inline drains.

Abstract: A drainage assembly (10) comprises a frame (11) for defining at least part of the surface boundary of a surface drainage aperture; and a grating (14) having formed therein a plurality of apertures. The grating (14) is hingedly secured to the frame (11) and is moveable, when so secured, between an operative position in which the grating (14) is contiguous with the frame (11); and an open position in which the grating (14) lies hinged away from the frame (11).

Abstract: A trap for a curbside drain opening to exclude solids of excessive size from the drain and trap them for analysis and recovery. The trap has a face which will open at high rates of water flow to avert flooding that might be or caused by plugging the drain opening. A filter is optionally provided to remove selected pollutants from the water stream for recovery and analysis.

Abstract: A hydraulic-permeation type environmental water-runoff filtration-system applicable to street curb-inlet type drainage-chambers, which generally cooperatively interconnect with street and parking-lot drains. The BLUEBAY-BMP™ pollution-trap provides advantage of community-tailored filtering stages, the preferred embodiment seting forth a convenient user-friendly prefabricated-kit assembly employing a basic build-in-place containment-housing which can be readily adapted to the studied needs of a given community,—without incuring alteration of existing sewer-stormdrains.

Abstract: An adjustable curb guard filter apparatus for filtering liquid flowing into a curbside drain and method for deploying the same. In accordance with one embodiment, the adjustable curb guard filter apparatus includes a filter sheet disposed between an upper and a lower of a pair of support bar members. The curb guard filter apparatus is deployed onto the curbside drain such that the ends of each of the support bar members exert an outwardly directed pressure against the inner lateral surfaces of the curbside drain enabling the filter sheet to form a substantially complete seal thereon. In a preferred embodiment, the lower end of the filter sheet is wrapped in a scroll-like manner around the lower support bar member such that when installed onto the curbside drain, the wrapped lower support bar member simultaneously provides dam and liquid filtration functionality along the bottom edge of the curbside drain.

Abstract: A curb-and-grate inlet filter is provided for temporarily covering, during nearby construction activities, the curb-and-grate inlet of a storm drainage system so as to filter from storm water runoff silt and debris attendant such construction. The curb-and-grate inlet filter includes a body having a first and a second portion formed of interconnected coils. The filter also includes a filter medium that may enclose the body. The filter medium filters silt and debris from water passing through the filter and into the curb-and-grate inlet.

Abstract: An in-line filter and method for reducing the solids content of a liquid passing through a storm sewer line. The frame of the filter is provided with a screen and optionally, filter media, and is decreased in size until the frame is small enough to fit into the storm sewer line into which liquids carrying solids and pollutants pass. The frame is then expanded into frictional engagement against the inside surface of the line.

Abstract: The present invention is a filter system for a curb inlet catch basin which catch basin includes a ramp in the curb front which feeds into a catch basin to allow storm water to run directly along the curb and down the ramp and which also has a grated cover so the water can enter directly through the grate. The water collecting trough is mounted inside the curb inlet catch basin at the bottom of the entrance ramp and has raised walls for collecting runoff water. A weir is formed into one of the raised walls allowing the water to run out of the trough. An elongated hydrocarbon collecting boom is removably attached adjacent the weir and positioned for the drain water passing through the weir to pass thereover. The catch basin is removably mounted to the trough adjacent the weir and positioned to receive water runoff from the trough through the weir and over the hydrocarbon collecting boom.

Abstract: A runoff drain filter is comprised of a tray for being supported inside a runoff drain. A plurality of separately removable cartridges are supported by the tray and aligned with holes in the tray. Each cartridge is comprised of a bucket and an insert. The insert is comprised of a central overflow tube centered in the bucket by a vented annular top plate and an annular bottom plate. Runoff pouring into the tray is directed into each bucket through the vented annular top plate. The runoff is filtered by a perforated tube which is part of the central overflow tube before it is discharged through an open bottom of the central overflow tube. Debris and contaminants are collected in the buckets. The total capacity of the filter is divided among the separately removable cartridges to enable a filled cartridge to be more easily lifted by an average person.

Abstract: The present invention relates to an apparatus and method, using the apparatus, for blocking the passage of solid materials into or through a channel while permitting the passage of fluid; automatically releasing the blocked solid materials under predetermined conditions when priority is given to maximizing the passage of fluid; automatically re-closing after the accumulated solid materials have passed downstream, and resuming the blocking of solid materials; and, repeating the process upon recurrence of the predetermined conditions.

Abstract: An insert for use in a sewer system to remove oils and solvents carried by surface water runoff. The insert includes a holder and a quantity of water permeable, hydrophobic, oil and solvent absorbing material such as melt blown polypropylene. The holder has two functions. It holds an effective quantity of the absorber and holds it in such a way that the surface water is exposed to the absorber to allow oils and solvents to be absorbed. The insert in preferably placed, cartridge-like, at the inlet or outlet of the sewer system so that it may be quickly checked, replaced and serviced. In one embodiment, the insert also contains a leaf trap.

Abstract: A sediment filtering apparatus and a method for removing sediment from a waterway. One or more collector assemblies are secured to a river bottom and have a leading, ramp surface facing upstream and over which the water flows. As the water/sediment mixture passes the apex of the collector, the trailing edge drops off rapidly thereby reducing the stream velocity and allowing the sediment to settle from the flow. The sediment then collects on the downstream side of the collector and via one or more openings reaches an internal cavity. A suction pipe is placed under negative pressure and draws the water/sediment mixture to a filtering apparatus which then returns filtered water to the waterway. The sediment and debris filtered therefrom is then easily removed.

Abstract: A protector for the inlet into a sewer system includes a straight or annular, porous tubular casing for placing on or around the periphery of a sewer grate; a skirt extending inwardly or outwardly from the bottom of the casing for overlapping the side edges of a sewer opening so the grate retains the protector in the use position; and a filler in the casing for maintaining the casing in an expanded condition, at least one of the casing, the skirt and the filler being permeable to water and impermeable to contaminants, whereby water can flow into the system while contaminants are blocked.

Abstract: An assembly for mounting in a side wall opening of a catch basin side wall and convertible into a trap for reducing the amount of matter being carried out of the catch basin by drainage water exiting the catch basin. The assembly includes a first trap member having a first wall and an outlet opening formed in the first wall and a second trap member releasably and sealingly engageable with the first trap member. The second trap member has a second wall spaced from the first wall when so attached. The assembly further includes a filter assembly releasably attachable to one of the first and second trap members, and having a filter member being made to capture matter entrained in drainage water.

Abstract: The object of the present invention is to provide a drainage basin attachment which can prevent breeding of mosquitoes in a puddle inside the drainage basin and also can shield scattering of an odor from the inside. The attachment includes a supporting member retained to the upper end of the basin body and an inner gate supported by the supporting member beneath the basin lid to close the top opening of the basin body. The inner gate forms an inner basin for temporarily storing the rainwater passing through the basin lid. The inner gate is normally closed and is opened by an action of force acting on the inner gate by the rainwater accumulated in the inner basin to an extent above a predetermined level, thereby dropping the rainwater from the inner basin into the basin body.

Abstract: A device and method for removing petroleum based contaminants from the runoff water that passes into a storm drain. The device is a filter apparatus that can be added to a storm drain. The filter apparatus consists of a filter cage that defines an open central conduit and a filter cartridge that wraps around the periphery of the filter cage. During normal rain conditions, water enters the sewer grate near the edges of the sewer grate. This water falls through the filter cartridge and is filtered. Solid debris that is mixed with the water is deflected through the central conduit and falls through the filter apparatus. During flood conditions, excess water is allowed to pass through the center conduit of the filter cage unfiltered in order to preserve the water flow capacity of the storm drain.

Abstract: A prevention system is provided for disallowing trash from entering a catch basin during a dry season, and employing an apparatus attached to the opening of a storm drain and having a plate movable between open and closed positions, and operated by an insert placed inside the storm drain catch basin, a water filtering replaceable bag or bags placed in the insert, and a water receiving canister below the bag or bags. Contaminants are removed from water that is used to impose weight to open the plate and then discharged.

Abstract: A roadway surface drain provided with a grating to detain trash but pass water, a hinged closure plate beneath the grating to close the opening in which the grating is fitted, and linkage to tilt the closure plate to open said opening when the rate of water flow is sufficient, while permitting flow of water and detaining trash when the rate of flow is acceptably slow.

Abstract: A system to exclude trash from curbside drains during periods of no or slow water flow, but opening to permit full entry during heavier flow such as during heavy rains. The system may have a linkage preventing opening by force on its barrier, and to assure that it will remain open should downstream drainage systems become flooded.

Abstract: A trap for a curbside drain opening to exclude solids of excessive size from the drain and trap them for analysis and recovery. The trap has a face which will open at high rates of water flow to avert flooding that might be or caused by plugging the drain opening. A filter is optionally provided to remove selected pollutants from the water stream for recovery and analysis.

Abstract: A curb inlet filter for temporarily enclosing the curb inlet of a storm drainage system during the construction of a road system in commercial and residential developments is adapted to be placed adjacent a curb inlet in order to enable storm water runoff to drain into the inlet while preventing silt and debris from being carried into and collected therein. The curb inlet filter includes an elongated body having a first and a second end to which are attached first and second weighted anchors. The elongated body includes a filter medium that may enclose a support member. The filter medium filters silt and debris from water passing through the filter and the weighted anchors help to maintain the filter in place adjacent the curb inlet.

Abstract: A debris-filtering downspout and other water runoff conduits and receptacles are disclosed, and include a Coanda screen mounted within a conduit, a culvert, a storm water conveyance or secured to a water collection basin. The Coanda screen provides high water throughput and is self-cleaning while effectively filtering debris contained in an incoming water stream.

Abstract: The invention is a filter mounted below a perforated grate cover (22) of a storm water inlet basin (20) suspended from a means of support, comprising inserted rigid bars (10) which rest upon at inlet cover support (28), which hold in position a catch basin insert comprising bar sleeves (6), storm water bypasses located in corners of the catch basin formed by vertical slit openings (12), and a bridge flap (2) which channels water above and over the bypass into the inside of a filter basket assembly (24) and the bag assembly is premanufactured in a continuous roll (14) and can be adapted to fit various catch basin sizes in the field on site.

Abstract: The present invention is a basket that is sealingly insertable in a grated drain. The basket is formed from inexpensive but surprisingly tough and effective polymer grating to which is bonded polymer sheet at the upper basket edges. The polymer sheet is wide enough so that it the grate of the grated drain can be picked up and put back into its concrete inset, capturing the polymer sheet edges under its heavy weight. The captured polymer sheet forms a peripheral seal between the pavement surface and the drain so that substantially all the water must pass through the basket.

Abstract: One aspect of the invention relates to a support assembly configured for removable mounting inside a manhole. The support assembly includes an anchor assembly having a mounting ring and at least two adjustable anchors secured to the mounting ring, and a setter assembly secured to the mounting ring. The setter assembly is capable of holding the anchor assembly in a predetermined position relative to an inside surface of the manhole and the anchors are adjustable relative to the mounting ring to contact the inside surface of the manhole thereby mounting the support assembly to the inside of the manhole.

Abstract: A debris-catching system for preventing debris from falling into the pipe opening at the bottom of a manhole catch basin. The debris-catcher comprises two semi-circular halves hinged together such that the two halves may be folded and inserted into a manhole opening. The debris-catcher comprises aligned apertures that allow it to be hooked and lowered into a manhole. The two halves are opened up to form a circular blocker which sets on the manhole bottom flat base. The debris-catcher allows normal effluent flow through the manhole while in place. The debris-catcher floats and will do so during an overflow condition. Further, the debris-catcher will resume its protective function after an overflow condition has subsided.

Abstract: The apparatus is a surface water purifying catch basin which uses a lamella separator to separate out fine sediment and a separate chamber to trap heavy debris, oil, and floating debris. The surface water enters an inlet chamber which is separated from a settling chamber by a divider wall that has a lower opening between the chambers and a higher overflow. The inlet chamber traps floating contaminates and those that are heavier than the water. The opening between the chambers permits the surface water to flow into and through the lamella separator. The catch basin exit is from the settling chamber, but the water can reach the exit only through the lamella separator that separates out the fine sediment in the water. All of the accumulated contaminates can be removed through access holes in the top of the catch basin.

Abstract: A debris recovery device for drainage systems that includes a shaft with a peripheral wall. A basket made out of a meshed material has a spring loaded hingedly mounted bottom wall that is partially opened when it carries a load of a predetermined weight. A peripheral flange rests on the shoulder of the peripheral wall. An oil trap assembly can be optionally added to catch oil spills before reading the drainage system. The oil trap includes a sheet of a porous oil-absorbing material.

Abstract: The self-disinfecting drain trap is an arrangement for the automatic cleaning and disinfecting of drain traps in drain channels. The cleaning and disinfection take place automatically during normal usage and without interruption of the operation of the drain trap. They take place by means of a novel combination for drain traps of electromechanical oscillation, preferably ultrasound, heating the interior space of the drain trap and heating the confining liquid and preventing growth on the inner wall by means of a growth-inhibiting and antimicrobially effective coating. The danger of recontamination of sanitary apparatuses and devices and therewith also of the ambient air by microorganisms from wastewater pipelines is effectively countered therewith.

Abstract: The present is basically comprised of a piece of polypropylene woven mesh cut to the size of the catch basin inlet opening grate, of a heavy-duty, partially-resilient rubber open frame member superimposed upon the woven mesh with peripheral butyl rubber adhesive strips, of peripheral butyl rubber adhesive strips secured to the underside of the woven mesh, and preferably a readily removable backing strip contacting the underside peripheral butyl rubber adhesive strip to avoid temporary and inadvertent adhering of the assembly in unwanted places.

Abstract: A means to engage two vertical pipes or tubes of unlike and increasing size that have been co-inserted such as with a roof or floor drain, in a manner that prevents the contained fluid from overspilling when the said pipes become full or when the fluid flows in a direction opposite from normal gravity flow, which is generally considered as flow from the smaller to the larger pipe. The means of engagement closes the void between the inside diameter larger pipe and outside diameter smaller pipe to withstand fluid pressure in a way that accounts for angular misalignment, pipe or tube eccentricity, manufacturing tolerance, as well as tube condition and debris attached to either pipe sidewall. More specifically, a roof drain system for existing roofs or new construction including a flanged outlet pipe for insertion into the roof drain pipe with the flange mounted on top of the roof. A water straining system is mounted on top of the flange.

Abstract: A drain device for draining flat roofs, balconies, terraces or other flat structures, has an inflow body provided with a collar rim. When the inflow body is mounted, the collar rim lies on the surface of the roof. A loose flange can be introduced into the inflow body. The flange also has a collar rim. A connector film can be tensed between the collar rims of the inflow body and the loose flange for establishing a tight connection of a covering layer between said two elements. In order to allow for abnormally large amounts of water to be drained, the inflow body is provided with a cavity, into which two drain pipes and lead. One of the drain pipes co-operates with a pressurized, i.e., a pumped drainage system, and the other one of the drain pipes cooperates with a free-flowing drainage system.

Abstract: A clog-free roof drain cover assembly includes a first drain cover fixed over the drain, and a second drain cover which is vertically movable relative to the first drain cover. The second drain cover includes a base provided with weep holes, a skirt located above the weep holes, a hat-shaped portion provided with slots, and a foam ring about the hat-shaped portion. During light rains, water flows under the skirt and through the weep holes, into the first drain cover, and into the drain. During heavy rains, debris becomes caught in the debris skirt. When the pooling water reaches a predetermined level, the foam ring floats, raising the second drain cover, which causes the debris skirt to lift the debris about the drain and permit water to pass freely underneath, into the first drain cover, and down the drain.

Abstract: An adjustable curb guard filter apparatus for filtering liquid flowing into a curbside drain and method for deploying the same. In accordance with one embodiment, the adjustable curb guard filter apparatus includes a filter sheet disposed between an upper and a lower of a pair of support bar members. The curb guard filter apparatus is deployed onto the curbside drain such that the ends of each of the support bar members exert an outwardly directed pressure against the inner lateral surfaces of the curbside drain enabling the filter sheet to form a substantially complete seal thereon. In a preferred embodiment, the lower end of the filter sheet is wrapped in a scroll-like manner around the lower support bar member such that when installed onto the curbside drain, the wrapped lower support bar member simultaneously provides dam and liquid filtration functionality along the bottom edge of the curbside drain.

Abstract: A waste water outlet unit, for a shower tray having a drain opening, comprises a base element which is locatable on the underside of the shower tray to cover the drain opening, and a clamp element which is locatable on the topside of the shower tray and which is engageable with the base element to clamp the base element to the underside of the shower tray. The clamp element has an aperture through which waste water from the shower tray can pass into the base element, and a filter element which is positionable over the aperture and which can be removed to enable access to the interior of the unit while maintaining the engagement between the base and clamp elements.

Abstract: An erosion control basin is a molded open topped receptacle that has support flanges that will support the basin on the interior of a storm drain grate frame. A filter is formed around an upright perforated drain pipe that is on the interior of the basin and which opens to an outlet. The basin catches debris and silt but permits water to drain out. The top of the drainpipe is left open for overflow purposes.

Abstract: An assembly for mounting in a side wall opening of a catch basin side wall and convertible into a trap for reducing the amount of matter being carried out of the catch basin by drainage water exiting the catch basin. The assembly includes a first trap member having a first wall and an outlet opening formed in the first wall and a second trap member releasably and sealingly engageable with the first trap member. The second trap member has a second wall spaced from the first wall when so attached. The assembly further includes a filter assembly releasably attachable to one of the first and second trap members, and having a filter member being made to capture matter entrained in drainage water.

Abstract: A baffle insert for conversion of conventional gravity drains into siphonic drains. The baffle insert is placed into a sump bowl of a gravity drain and by nature of its design changes hydraulic condition in the drain to a siphonic condition. The baffle insert is composed of a baffle plate and a plurality of fin extensions coupled to a bottom surface of the baffle plate. In a preferred embodiment, the number of fin extensions is 12, and the bottom surface of the baffle plate has a concave shape.

Abstract: A drain garbage collector of the invention includes a frame, a top grate, a separator grate, and a collector grate. A plurality of passages are defined through the top grate let the roadside garbage pass through. The separator grate prevents garbage from flowing out of the garbage collector via filtering wastewater flow. Thereby, the garbage collector collects garbage and the collected garbage can be cleaned regularly to prevent inundation caused by jammed drain.

Abstract: A mitred grate and drain cover comprises a peripheral edge having an upper and lower surface and a substantially elliptical shape which defines a space, and a plurality of cross pieces within the space. Depending sidewalls extend from the lower surface of the peripheral edge, and are constructed with respect to the peripheral edge such that they are at an angle other than 90° to the peripheral edge. The sidewalls define a space for receiving a pipe.

Abstract: A bi-functional roof drain includes a housing forming a drain manifold and a primary drain outlet to connect to a primary drainage system. A backup drain pipe penetrates the housing and extends through the manifold. The top of the backup drain pipe is positioned a distance above the housing, which may be variable. With this drain a method of retrofitting a roof drainage system to provide primary and backup water drainage is also presented. This method includes removing an existing uni-functional roof drain from a deck penetration through the roof, and installing a bi-functional roof drain in the same deck penetration. The two drain outlets are connected to the primary and backup drainage system. The height of a top opening of a backup drain pipe of the bi-functional roof drain may be adjustable in relation to a surface of the roof.

Abstract: The present invention is a filter system for a curb inlet catch basin which catch basin includes a ramp in the curb front which feeds into a catch basin to allow storm water to run directly along the curb and down the ramp and which also has a grated cover so the water can enter directly through the grate. The water collecting trough is mounted inside the curb inlet catch basin at the bottom of the entrance ramp and has raised walls for collecting runoff water. A weir is formed into one of the raised walls allowing the water to run out of the trough. An elongated hydrocarbon collecting boom is removably attached adjacent the weir and positioned for the drain water passing through the weir to pass thereover. The catch basin is removably mounted to the trough adjacent the weir and positioned to receive water runoff from the trough through the weir and over the hydrocarbon collecting boom.

Abstract: The apparatus is a surface water purifying catch basin which uses a lamella separator to separate out fine sediment and a separate chamber to trap heavy debris, oil, and floating debris. The surface water enters an inlet chamber which is separated from a settling chamber by a divider wall that has a lower opening between the chambers and a higher overflow. The inlet chamber traps floating contaminates and those that are heavier than the water. The opening between the chambers permits the surface water to flow into and through the lamella separator. The catch basin exit is from the settling chamber, but the water can reach the exit only through the lamella separator that separates out the fine sediment in the water. All of the accumulated contaminates can be removed through access holes in the top of the catch basin.

Abstract: A food disposal system for installation on a drain of a commercial kitchen sink enables segregation of oil/grease from effluent flows from the drain. A housing collects effluent flows containing water, oil/grease, and solids from the drain, and a macerating pump has an inlet connected to an opening of the housing and an outlet connected to a sanitary drain. A greasy water outlet extends to an oil/grease separator from an outlet on the housing above the macerating pump inlet, and a hot water backflush source enables hot water to flow into the housing.

Abstract: An ion removal arrangement includes a filter having a filter material made of synthetic or naturally occurring crystalline hydrated aluminum silicates having a framework structure, which contain alkaline or alkaline earth ions. The filter is formed as a double pipe cartridge having an inner pipe and an outer pipe. The filter material is filled in the annular space between the inner pipe and the outer pipe. The filter is installed in the cast iron gutter pipe of a gutter system.

Abstract: The invention provides a runoff water purification system for removing pollutants accumulating on the road surfaces, reducing the workload of the sewage water treatment plants and preventing environmental water pollution. The system 1 is installed under the ground of the side of the road 2. Runoff water runs into the system 1 through a curb inlet 120, being purified and discharged to a sewage pipe 56. The system comprise a concrete box 11, in which a wall 10 separates the box into a maintenance tank 7 and a treatment tank 9, both of which are connected each other at their lower ends. Runoff water flows into the maintenance tank 7 and to the treatment tank 9, through the connecting conduit where pollutants are removed, and discharged to the sewage pipe.

Abstract: A catch basin filtration system, comprising a filter body, dimensioned to fit within a drain inlet forming a trough or reservoir obstructing at least a portion of the inlet. The filter body is supported by a filter body support dimensioned to cooperatively engage with the interior walls of the inlet and with the filter body to substantially maintain the filter body in a pre-selected shape and position within the inlet. One or more connectors removably connect the filter body to the filter body support.

Abstract: A sewer basket and its support are to be positioned at any selected level within a vertical sewer pipe having an interior surface and an opening, of reduced size or not, at street level. The basket support is secured to the interior surface of the sewer pipe to receive the basket that includes a plurality of filter units adjacently and releasably resting on the basket support. Each filter unit is so sized as to get through the sewer opening while being in a substantially horizontal orientation. Each filter unit includes a frame, a filter screen secured to and extending across the frame, and a handle device accessible from the pipe opening to properly position, place and retrieve the unit on and from the basket support respectively. The basket support includes an intermediate support having a generally flat lattice shape that abuttingly rests thereon and that abuttingly supports the filter units.