Providing an easy to install shower tray and drain assembly. The tray comprises a stepped upper surface and a receptor having at least one step for receiving the drain assembly. In certain embodiments, the drain assembly comprises a cup for securing the drain assembly to the receptor and to a drainage pipe, a clamping flange for securing a waterproof floor covering between itself and the cup, at least one seal for providing a watertight seal between the clamping flange and cup. The drain assembly may further comprise a grate, a grate retainer, and an adjuster for adjustably securing the grate retainer to the clamping flange.

A method for filtering one or more of run-off fluid, chemical spills and facility discharge, the method including: storing a first portion of the one or more of run-off fluid, chemical spills and facility discharge in a first compartment; discharging additional fluid from an overflow in the first compartment when a volume capacity of the first compartment is full; in a second compartment in fluid communication with the first compartment, filtering the one or more of run-off fluid, chemical spills and facility discharge stored in the first compartment that is not discharged through the overflow, and discharging filtered fluid from the second compartment.

A drainage installation (20), for a warehouse and/or factory floor that has a surface level (26), has a drainage channel (24) recessed into the floor and a plurality of sections of flat grating (22) seated inside the drainage channel (24). The drainage channel (24) has an axially-elongated, square-U shaped channel portion which is flanked by horizontal shoulders (30), which then transition into vertically-depending skirt portions (32). The horizontal shoulders (30) as well as the sections of flat grating (22) are arranged to be more less planar with the surface level (26). Wherein, the skirt portions (32) are formed with a series of apertures (36) which either allow the injection of wet cement underneath the shoulder portions (30) of the drainage channel (24), or alternately the venting of the wet cement when the cavity under the shoulder portions (30) are over-filled.

A trench drain includes a trench, a grating seat and a grating hingedly connected to the trench. The trench has a base wall with peripheral side walls extending upwardly therefrom and an outwardly-extending peripheral flange. The grating seat is configured to receive the grating. The peripheral side walls of the trench have a pair of opposing elongated slots formed therein and the grating has a pair of posts on opposing ends thereof. Each of the pair of posts on the grating are received in a respective one of the pair of opposing elongated slots of the trench to establish an axis of rotation.

A separator unit includes a tank defining an internal volume and having an inlet and an outlet. An insert separates the tank into an upper chamber and a lower chamber. The insert includes a weir at an upper side to define an intake area for receiving an influent liquid, a first opening in the intake area for delivering liquid down into the lower chamber and a second opening on an opposite side of the weir for delivering liquid from the lower chamber back up into the upper chamber. The separator may include one or more of the first opening being of arcuate shape, a perforated shroud extending downward from the insert within the lower chamber and/or an upflow pipe extending downward from the second opening into the lower chamber, a bottom of the upflow pipe covered, and a slot opening in a sidewall of the upflow pipe.

A drain assembly for installation in a shower floor, the drain assembly including a drain body including an upper surface defining a top side, and a lower surface opposite the upper surface defining a bottom side. The drain assembly also defines an aperture extending along an axis through the drain body between the upper surface and the lower surface and includes an outlet having a flange and an elongated body. When assembled, the elongated body is configured to extend below the lower surface of the drain body when the flange rests on the upper surface. The drain assembly also includes one or more fasteners configured to couple the outlet to the drain body to form a water-tight seal therebetween, where each of the one or more fasteners are accessible from the top side.

A ligature resistant strainer for a drain assembly and connecting to a drain system. The strainer includes a grate and an extension block coupled to the grate. The grate defines a first thickness, and the extension block defines a second thickness that is greater than the first thickness. Portions of the grate cooperate with portions of the extension block to define a plurality of apertures extending through the strainer and inhibiting attachment of a ligature to the strainer.

The invention pertains to an odor trap, which comprises a first drainage channel situated between an inlet and an outlet, comprising, viewed in the flow direction, a first closing wall for the closing off of an uppermost part of the drainage channel and a second closing wall for the closing off of a lowermost part of the first drainage channel. The first and second closing walls, viewed in a horizontal direction, overlap. The odor trap comprises an elongated main body. The inlet substantially extends over the length of a first planar surface of the main body, which first planar surface is determined by the first closing wall. The second closing wall is situated in the main body. The outlet is situated in a second planar surface, situated opposite the first planar surface. The invention also pertains to a drain body and a drain assembly.

A filtering device for reducing radiation, sediment, contamination, pollution, and erosion control contains a first flow plate, a second flow plate, a tubular portion, and a biodegradable filtering material. The first flow plate is terminally connected to a first end of the tubular portion. A plurality of openings of the first flow plate allows water to enter the tubular portion. The second flow plate is terminally connected to a second end of the tubular portion. A plurality of openings of the second flow plate allows water to exit the tubular portion. The biodegradable filtering material is integrated within the tubular portion so that water entering the tubular portion at the first end is filtered prior to exiting the tubular portion at the second end. Switchgrass is utilized as the biodegradable filtering material.

Systems and modular devices for roof or ground-level stormwater management are disclosed. A modular stormwater management device includes a water retention mat structured to absorb stormwater, a rigid frame structured to support the water retention mat, and a perforated surface structured to permit drainage of the stormwater from the water retention mat through the perforated surface. A modular stormwater management system includes a plurality of modular stormwater management devices, each of the modular stormwater management devices including a water retention mat structured to absorb stormwater, a rigid frame structured to support the water retention mat, and a perforated surface structured to permit drainage of the stormwater from the water retention mat through the perforated surface.