Abstract: A relatively flat roof of a structure is provided with a restricted flow roof drain assembly. The roof drain assembly includes a roof drain extending through an opening in the roof for receiving water collected on the roof. The drain has a predetermined maximum flow rate capacity. A flow restrictor is set on the roof, and surrounds the roof drain. The restrictor has a dam including at least one aperture. The at least one aperture has a variable flow rate capacity which is less than the maximum flow rate capacity of the roof drain.

Abstract: A catch basin curb inlet opening cover is a steel plate member which includes a main segment having at least one first opening whereby fluid may pass through said at least one first opening into the curb inlet opening when said plate member is positioned in its intended place, and a bend portion. The bend portion is formed from the main segment by deforming a respective section of the main segment. When in place across the curb inlet opening, the bend portion extends into the curb inlet opening. A respective surface of the bend portion is in sufficiently close proximity to either or both of the left edge or the right edge of the curb inlet opening so that the plate member will resist horizontal movement occasioned by being struck by a snow plow or other heavy duty street equipment. Adjusting means are described which adjust the length of the bend portion to accommodate different inlet openings. The main segment includes a further opening adapted to permit the viewing of a precautionary badge.

Abstract: A method of manufacturing a cast article including a frame that in use of the article defines an aperture; and a further component that is in use retained moveably captive relative to the frame. The method casts the further component and respective first and second frame members, the further component and the frame members being securable together to form the article, and subsequently assembles the frame members and the further component together to form the article. A gully grate results from practicing the method.

Abstract: A locking drain filter for floor drains with drain wells is provided. An upper filter portion has external dimensions that allow the upper filter portion to be inserted into a drain line at the bottom of the drain well. A lower filter portion has first external dimensions that allow the lower filter portion to be inserted into the drain line and second external dimensions that allow the lower filter portion to be inserted into the upper filter portion. A compressible gasket has external dimensions that allow the compressible gasket to be inserted into the drain line when the compressible gasket is in an uncompressed state and internal dimensions that allow the compressible gasket to be placed over the second external dimensions of the lower filter portion.

Abstract: A drain filtration apparatus including a catch basin and a filter housing. The catch basin includes a conduit extending upward from a drain opening in the catch basin, the upper vertical edge of the conduit being lower than the opening of the catch basin. The filter housing is removably securable to the upper portion of the conduit and includes a cover having an upper surface sufficient to cover the upper opening of the conduit as well as an elongated circumferential portion having openings which extend downwardly from the cover.

Abstract: A drain grate system can be installed in a curbside or storm drain to block the passage of debris while allowing liquid to flow into the drain. The drain grate system can open in response to a high flow rate to allow liquid and debris to flow into the drain. A locking mechanism can maintain the drain grate system in a closed and locked position and can unlock in response to a predetermined amount of force of a fluid flow.

Abstract: An inlet flow multiplier for a drain is provided. The multiplier includes a planar baffle having a mounting collar oriented perpendicular to the plane of the baffle. The collar has a pair of clamping flanges to allow it to be mounted to drains of varying diameter. The length of the baffle is substantially longer than the diameter of the drain to which it is mounted. In one embodiment, the length is approximately five times as long. The baffle is mounted so that it intersects the circumference of the drain. Optimally, the baffle bisects the drain opening. A bi-functional roof drain utilizing the inlet multiplier is also provided. Such a drain includes a primary drain and a backup drain pipe extending through and isolated from the primary drain. The planar baffle is attached via the mounting collar to the backup drain pipe to position the planar baffle above the top opening.

Abstract: A two-part grate assembly for a channeled drain trough. The grate assembly has a grate frame that receives a removable grate section. The grate frame has lugs with vertical projections extending therefrom that define securing recesses that assist in aligning and securing the grate frame atop a drain trough. Additionally, the present invention is directed to the use of an alignment bar that prevents the grate section from sliding out of operating position within the grate frame by restricting lateral movement of the grate section. Further, the present invention is directed to a method of providing a grate assembly for a channeled drain trough having a grate frame that is adapted to receive a removable grate section.

Abstract: A floor drain includes a head having a top surface, a leveling member, and a frame having a top surface and a bottom surface. The bottom surface of the frame is positioned adjacent the top surface of the head. The leveling member is positioned between the head and the bottom surface of the frame and is displaceable relative to the head in a first direction. A method of leveling a floor drain with a floor surface is also disclosed.

Abstract: A filter housing with a socket drain for minimizing waste and downstream contamination of valuable fluids during filter element changes.

Abstract: A modular curb inlet filter apparatus having an internal axial tube member on which are disposed at least two disc spacers, which in turn support a cylindrical mesh frame member, which in turn supports a tubular filter fabric. Wedge anchors composed preferably of a compressible polymer foam are provided with anchor bores of sufficient diameter to receive the ends of the cylindrical mesh frame member therein, the anchor bores being disposed near the base of the wedge anchors such that the curb inlet filter inlet apparatus will be seated close to surface of the curb inlet base when positioned within the curb inlet. Preferably the wedge anchors are provided with a base scuff plate made of a durable polymer material to prolong their use life. A short silt flap or skirt depends from the filter fabric, the silt flap extending the approximately the length of the curb inlet filter apparatus to seal any gap beneath the curb inlet filter apparatus and the base of the curb inlet.

Abstract: A curb opening filter apparatus is provided for removably attaching over a curbside opening for a storm drain. The filter apparatus has a frame which can be interconnected with similar frames to adjust for different size storm drain openings. The curb opening filter has a system for vertically attaching a filter apparatus over the curbside opening.

Abstract: The invention relates to an integrated belowground vault with filter catch basin, that allows the runoff water to enter into a belowground two-part vault passing through a commercially available replaceable filter before being transferred out to the sewer, Rood control system or out through a French drain consisting of a cavity below the device that is filled with drain gravel. A layer of filter cloth can optionally be placed over the drain gravel. This device will be manufactured in variety of sizes and shapes and made from several different materials. The device has the unique ability of being capable of filtering low flow water runoff while allowing high volume to pass through with the added benefit of not retaining water that can become a mosquito breeding ground.

Abstract: A filter for use in a storm water drain to prevent debris from reaching the outlet of the drain. The filter is adjustable to be sized for a range of flow capacities. The filter includes a main filter section having openings through which water flows. A pair of adjustable side grates project from the main filter section and are adaptive to be connected to the sidewall of a storm drain. Flow capacity of the filter can be varied by adjusting the effective width of the respective side grates.

Abstract: A drain trap assembly for separating sediment from wastewater released from kitchen, bath or washroom appliance such as a sink or tub including a conduit with a first upper inlet portion and second upper outlet portion. Between the inlet and outlet is located a lower bend portion. Interrupting the lower bend portion is a third conduit portion including a cup closure for sediment accumulation area out of the wastewater pathway. Affixed to the closure cup and extending generally upwardly within the drain trap assembly and across the wastewater flow is a strainer in the form of at least one plate including through-holes sized to reject particulate sediment and other solids of a predetermined size. A second embodiment of the strainer takes the form of a mass of fibers affixed to the closure and extending across the wastewater flow. Closure removal automatically withdraws the strainer, offering ready access to accumulated sediment.

Abstract: Apparatus for filtering out and collecting debris at a storm drain includes upper and lower assemblies, each including a frame member and a filter member. Water passing through or alongside the filter member of the upper assembly is directed into the filter member of the lower assembly.

Abstract: A reusable protection device for a storm drain inlet includes a semi-permeable sleeve filled with a filter media. The protection device generally seats over a mouth to cover the storm drain inlet to allow passage of water runoff, but limit passage of sediment into the storm drain inlet. The sediment can be removed with a cleaning process for the removal of additional sediment from additional runoff water.

Abstract: On the basis of rainfall amount data (24) representing a timeseries change in the amount of rainfall in a district as an estimation target and unascertained water amount data (23) representing a time-series change in the amount of unascertained water at a base point located downstream of each district, an unascertained water occurrence distribution estimating unit (12) of a control unit (10) calculates a correlation value between the rainfall amount data (24) in each district and the unascertained water amount data (23), and outputs each correlation value as an unascertained water occurrence distribution in each district.

Abstract: A floor waste (10) including a filter basket (16) having a magnet (18). The magnet (18) attracts a movable valve member (27) upwardly from a seat (22) to allow liquid to pass through the seat (22). When the basket (15) is removed the movable valve member (27) closes the seat (22). In one embodiment the valve member (27) includes a valve disk 29 that prevents the flow of liquid through the seat (22) when engaged therewith, while in another embodiment the disk (29) has a series of passages (31) that permits the flow of liquid through the seat when the disk (29) is engaged with the seat (22).

Abstract: A feature of the present invention is it is adaptable to any pre-existing storm catch basin system. Another feature of the present invention is that it permits empirical analysis and verification of the draw down rate. Another feature is the present invention can be adjusted or modified to increase or decrease the rate of draw down after it has been installed to insure regulatory conditions are precisely met without difficulty. Changes in future regulatory draw down rates can be easily implemented. A flow restriction device has an orifice plate, the orifice plate having a frontal surface area A and at least one opening for the passage of fluid of an area Oa, wherein Oa is less than A. The flow restriction device may also employ a screen debris plate, the screen debris plate having a plurality of spaced openings for the passage of fluid; the sum area of the openings being ? Osp wherein ? Osp is greater than Oa.

Abstract: The present invention relates to an apparatus for maximizing the blockage of fluid borne solid materials from passage through a catch basin into the downstream parts of a fluid flow channel, with minimum impact on the volume and rate of fluid passing through the channel. The apparatus comprises at least one filter sheet secured within the catch basin at a location above and covering a large proportion of the floor of the catch basin, an overflow wall separating the filter area from an unfiltered overflow area, and a diverter for directing incoming trash away from the overflow area and to the filter side of the overflow wall. Although the apparatus covers a large area within the catch basin, the overflow wall, overflow area, and clearance between the filter sheet(s) and the floor provide sufficient space for fluid and excess trash to pass in the event the capacity of the apparatus for holding them is exceeded.

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. Although the invention relates to street storm-water drainage channels, particularly inlets to catch basins, it can be applied to any fluid-flow channel where blocking the passage of solid materials is important but where there are conditions under which priority should be shifted from blocking the solid materials to releasing them downstream.

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: A storm water treatment device that is installed under the grate of new or existing catch basins, and more commonly referred to as an insert. The catch basin decontamination apparatus has a universal housing and support ring that allows one design to fit most applications. Adjustable chains allow for proper position below grate and a semi-flexible molded or rigid deflector directs incoming drain water to the housing. A slip-on filter/absorber cartridge fits over a perforated drain tube, in the center of the housing, allowing the drain water to first pass through the filter/absorber media before exiting through the drain tube and out the bottom of the housing. The filter/absorber cartridge includes a variety of absorber materials that absorb oil and repel water. Activated carbon, microbes and other site specific absorbents can be used in the replaceable slip-on cartridge. A leaf pre-strainer helps prevent leaves and debris from entering the housing.

Abstract: A complete storm water management system and process which incorporates a wetlands water treatment system. This system creates an infrastructure, flow control which is multi-level and multi-stage. This is a modular system which includes three or more chambers and/or ditches through which the storm water or other influent passes and is cleaned. The influent which flows into a storm drain, curb inlet, or inflow pipe into the system is directed first into a screening type catch basin inset filter within the first chamber of the system. The influent is treated within the first chamber before it passes out of this chamber into the incorporated wetlands system. The water flows through the wetlands chamber or ditch where it is further filtered and decontaminated through both an aerobic and anaerobic process. In situations of high runoff there is a bypass component.

Abstract: A conduit end cap structure (e.g., a floor drain assembly) that is securely attached to the conduit and aesthetically pleasing. The end cap of the conduit comprises a perforated plate. Anchor supports extend from the substantially concealed underside of the plate, each providing support for an anchor that is received by an anchor receiving structure on the conduit to securely attach the plate to the conduit near its opening. The anchor may be in the form of a fastener (e.g., a set screw), and the anchor receiving structure is in the form of a channel provided on the inside wall of the conduit opening. The fastener extends into the channel, thereby securely retaining the plate to prevent it from dislodging from the conduit end.

Abstract: In one aspect of the present invention, a fluid filter comprises a primary filter configured to filter water passing therethrough, the primary filter having first and second ends. A mount holds the planar filter in a chamber adjacent to an opening in the chamber, such that fluid passing through the opening substantially passes through the primary filter. The mount also holds the primary filter at an angle with respect to the opening such that the first end is closer to the planar surface than the second end and such that the second end, but not the first end, is in contact with a wall of the chamber. A downstream filter may also be used to provide a cascading effect permitting water to flow over the edge of the primary filter onto the downstream filter.

Abstract: An inlet filter for use with stormwater drains and roof drains. The filter is formed of a mat of natural or synthetic fiber material with netting bonded on one side. A convenient method for attaching the filter to a drain using cable ties or adhesive is provided.

Abstract: A water discharge pipe and drain head assembly structure that, by means of a matched drain head inner diameter bore, seal ring shape, and clamp ring, enables the utilization of a simple stomp operated, additionally fabricated, foot-driven component which is sleeved into the inner diameter bore of the drain head to shove down the clamp ring a predetermined distance and thereby compress and deform the seal ring such that a tightly sealed contact is established against a water discharge pipe inserted through them. The arrangement effectively affords optimal watertight anti-seepage efficacy between the water discharge pipe and the drain head, fully solving the numerous problems and shortcomings of the conventional threaded-type mounting ring.

Abstract: A system for filtering debris carried by stormwater flowing through a gutter inlet into a catch basin utilizes a filter device configured to conform to and to substantially cover the gutter inlet and a retainer device for maintaining the filter device in place covering the gutter inlet. The retainer device is attached to the filter device and configured to extend through the gutter inlet to hang gravitationally downwardly into the catch basin. The retainer device is weighted to gravitationally pull and hold the filter device securely against the gutter inlet against dislodgement under the forces of flowing stormwater.

Abstract: A disposable drain strainer is removably received within a drain opening having an adjacent drain rim substrate. The strainer has a strainer portion, a ring portion, and a seal release mechanism. Top and bottom surfaces of the ring portion are adapted to sealingly engage the drain rim substrate. The seal release mechanism is integral with the ring portion, and facilitates release of the seal so that the strainer can be readily be removed from the sink and discarded. In one aspect, the seal release mechanism comprises a tab. In another aspect, the seal release mechanism comprises a press-release component, wherein the ring portion has arced ring walls having convex and concave configurations. During sealing engagement with the drain rim, the ring portion is in the convex configuration. Pressure applied to the ring portion causes it to move to the concave configuration.

Abstract: A storm drain filter assembly that filters incoming drainage water and can prevent sediment, debris, and other undesirable materials (such as oil) from entering a storm drain's inlet. The frame can be rotated upwardly away from the road for street sweeping, and can also be detached from the curb and removed to a remote location for cleaning. The filter assembly comprises a filter panel including a bristle filter and a frame that holds the bristle filter, the bristle filter including a plurality of bristles. At least one seal is positioned between the filter panel and the surface to prevent leakage around the edges of the panel. A pivotable mount is provided for holding the filter panel in an operational position in the path of the flowing drainage water. In one embodiment the bristles are made of polypropylene.

Abstract: A storm sewer drainage grate filter for above grade installation and use includes a frame and a screen supported by the frame. The frame may include a top ring, a bottom ring, and one or more intermediate rings. The rings may be interconnected by a plurality of risers. A method directed to fitting a storm sewer grate filter apparatus to a storm sewer opening includes installing an above grade grate filter having a frame and screen supported by the frame, allowing debris to accumulate on the exterior of the grate filter, and clearing the debris from the exterior of the grate filter.

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: The present invention relates to a screen lock-unlock system for automatically locking and unlocking a screen that is within a fluid channel wherein the screen is rotatable relative to the channel from closed to open. The system includes an actuator comprising a flapper and a trigger, wherein the flapper is rotatably connectable to the back of the screen. The flapper is operably connected to the trigger for moving the trigger. And, the system is further summarized, according to one aspect, as follows. It includes a lock bar wherein the lock bar is rotatably attachable to a screen support structure, the lock bar being rotatable by movement of the trigger. The lock bar intercepts the rearward arc path of a blockable part (such as a flange extending laterally from the screen). The flapper is located and oriented with respect to the closed screen for at least part of the flapper to be rotatable in response to pressure from impact fluid.

Abstract: A stormwater treatment system including a substantially water impermeable treatment container for treating stormwater through a bioretention mechanism. The treatment container includes an overflow/bypass opening to receive stormwater that bypasses the treatment container filter media, or is only partially treated as a result of high stormwater flows in excess of the capacity of the container to treat the stormwater. The stormwater is directed into the container through an inlet, such as an inlet pipe, preferably connected to a roof drain system for processing and treating stormwater from the roof of a building. The overflow/bypass opening may be adjacent the top wall or bottom wall of the container.

Abstract: A drain filtration apparatus including a catch basin and a filter housing. The catch basin includes a conduit extending upward from a drain opening in the catch basin, the upper vertical edge of the conduit being lower than the opening of the catch basin. The filter housing is removably securable to the upper portion of the conduit and includes a cover having an upper surface sufficient to cover the upper opening of the conduit as well as an elongated circumferential portion having openings which extend downwardly from the cover.

Abstract: A filter trap into which waste water can be dumped to separate particulate matter from the water. A sensor senses when the liquid level in the filter trap rises above a predetermined level, and triggers an alarm to indicate the filter basket is full of particulate matter and must be removed to dispose of the contents. The withdrawal of the filter basket from the filter trap causes the inlet thereto to automatically close so that waste water cannot be dumped into the filter trap when the filter basket has been removed. A sensor senses when the filter basket has been removed to provide a visual indication thereof.

Abstract: A bi-functional roof drain includes a housing forming a drain manifold and a drain outlet to connect to a drainage system. A vent pipe penetrates the housing and extends through the manifold. The top of the vent 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 water drainage and system venting 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 drain outlet is connected to the drainage system and the vent pipe is connected to the system that requires venting. The height of a top opening of the vent pipe of the bi-functional roof drain may be adjustable in relation to a surface of the roof.

Abstract: A flexible-wet-floor waste for engagement with flexible waterproof floor covering material, comprises a waste body, a waste-water inlet (28) for the passage of waste water into the waste body, a waste-water outlet for connection of the waste body to a drain, means (30, 32) for engaging flexible waterproof floor covering material with the waste, and a tiling adaptor (10). The tiling adaptor (10) includes an adaptor body (12) having an upper surface (18) with a perimeter edge (24) for lying flush or substantially flush with an upper surface of adjacent or abutting tiles, an aperture (14) formed in the adaptor body (12) for liquid communication with the waste-water inlet (28), and means (32, 38, 42) for directly or indirectly engaging the body (12) of the tiling adaptor (10) with the waste body. A single kind of waste can thus be used with both tiles and flexible waterproof floor covering material.

Abstract: A rooftop drainage device is provided for use in protecting rooftop drainpipes from clogging. An exemplary embodiment of the drainage device includes a filter comprising at least three sides, wherein at least one of the sides includes a plurality of apertures for allowing liquid to pass-through the at least one side into the drainpipe, while filtering debris; and an object receptacle mounted to a top of the filter for removably retaining an object, wherein a weight of the object holds the rooftop drainage device on the rooftop and over the drainpipe without need for mechanical fasteners.

Abstract: A filter assembly for use in drainage systems to prevent the buildup of eroded materials such as soil, leaves and other debris is disclosed. The assembly includes a unitary frame and a filter media attached to the frame and is adapted to be retained within a component of a drainage sewer such as a catch basin. A porous material filter media such as a woven or non-woven geotextile allows for the flow of water through the filter while retaining debris or soil within the filter. The filter media extends into the basin to provide volume for the retained material without blocking the entire surface of filter.

Abstract: A combination filtration and anti-microbial catch basin filter disposed in a catch basin of a storm water system such that, in addition to removing particulate matter and other contaminants, the concentration of bacteria in storm water that remains resident in the sump of a catch basin after a storm event is severely reduced or eradicated. The catch basin filter comprises a filtration bag depending from the opening such that water must pass through the bag and a plurality of strips or similar members depending from the filtration bag, the length of the strips being such that they remain in contact with water resident in the bottom of the catch basin. In an alternative embodiment, the device comprises a floatation member with filtering means and anti-microbial strips depending therefrom.

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: A drain grate filter assembly having a filter sheet member, wedging anchors and mechanical fasteners, whereby the assembly is connected to a drain grate by inserting wedging anchors into the apertures of the grate, placing the filter sheet member atop the grate and inserting fasteners through the filter sheet member and into the wedging anchors.

Abstract: A grate cover in combination with a swimming sump being installed in a recess in the top of the sump. The grate cover having a multiple of interstices or openings there through. The size of the interstices being held to a minimum so that fingers of a human cannot be sucked into the openings. The top surface of the grate cover has a curvature thereon while the bottom surface is flat. This way, the forceful suction within the sump cannot obtain enough force to suction the skin of a human against the grate cover to cause any injuries.

Abstract: A storm drain filter assembly includes a frame and several rows of bristles extending down from a top rail of the frame. The frame can be positioned next to a storm drain with the bristles blocking debris from entering the drain while allowing water to flow into the drain. As the frame is lowered toward the ground in front of the drain, brackets on the back of the frame slide between the storm drain surface and other brackets that have been affixed to the storm drain surface, so that when the frame rests on the ground with the bristles covering the storm drain, it is retained in place by the brackets. The frame assembly can be removed simply by lifting the frame up and away from the storm drain.

Abstract: A curb inlet filter for filtering out sediments and the like flowing into a curb inlet, includes a filter body, including a water permeable, substantially rigid, elongated frame having an upstream side and a downstream side thereof, and an elongated filter cover formed around at least one of the sides of the frame. The filter cover is formed of a filtration material to filter out sediments and the like. Further, a weight support attached to a bottom of said filter body for supporting a weight, and a support strap connects the weight support to an upper portion of the filter body.

Abstract: A storm water treatment device that is installed under the grate of new or existing catch basins, and more commonly referred to as an insert. The catch basin decontamination apparatus has a universal housing and support ring that allows one design to fit most applications. Adjustable chains allow for proper position below grate and a semi-flexible molded or rigid deflector directs incoming drain water to the housing. A slip-on filter/absorber cartridge fits over a perforated drain tube, in the center of the housing, allowing the drain water to first pass through the filter/absorber media before exiting through the drain tube and out the bottom of the housing. The filter/absorber cartridge includes a variety of absorber materials that absorb oil and repel water. Activated carbon, microbes and other site specific absorbents can be used in the replaceable slip-on cartridge. A leaf pre-strainer helps prevent leaves and debris from entering the housing.

Abstract: A drain trap assembly for separating sediment from wastewater released from kitchen, bath or washroom appliance such as a sink or tub including a conduit with a first upper inlet portion and second upper outlet portion. Between the inlet and outlet is located a lower bend portion. Interrupting the lower bend portion is a third conduit portion including a cup closure for sediment accumulation area out of the wastewater pathway. Affixed to the closure cup and extending generally upwardly within the drain trap assembly and across the wastewater flow is a strainer in the form of at least one plate including through-holes sized to reject particulate sediment and other solids of a predetermined size. A second embodiment of the strainer takes the form of a mass of fibers affixed to the closure and extending across the wastewater flow. Closure removal automatically withdraws the strainer, offering ready access to accumulated sediment.