Abstract: A strainer for a floor sink and a floor sink strainer assembly. The strainer includes a central body defining a perimeter and further includes a generally planar flange extending outwardly from the perimeter of the body. The flange has a shape and size corresponding to the size and shape of the bottom wall of the floor sink. As a result, the strainer is constrained from lateral movement and lifting during a high influx of water.

Abstract: An anti-oscillation valve for and in a trap primer to restrict the flow of water from the supply line to an upper chamber of the trap primer and to facilitate the flow of water from the upper chamber to the supply line. The anti-oscillation valve having a body with a water supply bore provided therethrough. The bore includes portions defining an inlet and an outlet. First and second bore shoulders are formed in the bore. A filter screen is retained in engagement with the first bore shoulder. An anti-oscillation valve disc freely rests on the second bore shoulder and is retained between the first bore shoulder and the second bore shoulder. The anti-oscillation valve disc includes a valve disc orifice defined through and communicating the inlet with the outlet.

Abstract: A method for distributing water from a trap primer to at least one trap. The method includes providing a trap primer having an upper chamber separated by a flexible diaphragm from a lower chamber, and having a resilient gas enclosure located in the lower chamber. Water is provided to the trap primer at a line pressure charging the upper and lower chambers. As a result of a reduction in line pressure, the diaphragm is disengaged from a valve stem opening an orifice and causing the flow of water from the lower chamber to at least one trap.

Abstract: Embodiments have an accessory rail along the length of each side of a trench drain channel. The accessory rib allows the convenient attachment of accessories to the sides of a channel in order to facilitate the installation of a trench drain, place drain outlets at any convenient place on a channel, and to create right angle joints between two trench drains.

Abstract: An embodiment wall hydrant includes a reservoir, conduits containing an operating rod assembly and a service rod assembly, and a fluid outlet with a hose connector. The service rod assembly allows water supply to the hydrant to be shut-off from the front of the hydrant which allows servicing of the hydrant without requiring water shut-off to all or a portion of the water supply to the building. Embodiments include a vacuum relief dual check valve assembly at the fluid outlet which prevents backflow of water into the hydrant. Embodiments include a box which protects the hydrant controls.

Abstract: Embodiments include plastic floor drains or sinks. Embodiments also include plastic floor drain which comprises an approximately square receptor having an open top with a notch and a rim at the open top, an outlet at the bottom, and four sides. Each side has a shoulder located along the width of each side at approximately ? the distance from the top to the bottom of the body. Embodiments also include a plastic floor drain which comprises an approximately square receptor having an open top with a notch and a rim at the open top, an outlet at the bottom, and four sides. Each side has a shoulder having a bottom side and located along the width of each side at approximately ? the distance from the top to the bottom of the receptor. There are a multiplicity of seepage holes in the receptor arrayed along the top sides of the shoulders. A four-sided anchor flange is adhesively connected to the shoulder.

Abstract: An embodiment providing one or more improvements includes a trap primer with upper and lower chambers separated by a flexible diaphragm which also interacts with a valve stem to start and stop the flow of water from the trap primer to the trap(s). The lower chamber contains a polymeric foam medium such as a foam ring containing closed cells containing gas or gases. In use, equilibration of water pressures in the upper and lower chambers causes distortion of the foam ring, resulting in equilibration of the gas pressure in the closed cells with that of the chambers. A decrease in line water pressure causes water from the lower chamber to be emitted into the traps.

Abstract: An embodiment wall hydrant includes a reservoir, conduits containing an operating rod assembly and a service rod assembly, and a fluid outlet with a hose connector. The service rod assembly allows water supply to the hydrant to be shut-off from the front of the hydrant which allows servicing of the hydrant without requiring water shut-off to all or a portion of the water supply to the building. Embodiments include a vacuum relief dual check valve assembly at the fluid outlet which prevents backflow of water into the hydrant. Embodiments include a box which protects the hydrant controls.

Abstract: An embodiment includes a drain pipe waste water closure protection device which allows passage of fluids through a drain into a pipe waste water closure and a waste water pipe while preventing backflow of fluid or gas from the waste water pipe and pipe waste water closure, as well as preventing evaporation of a water-containing pipe waste water closure located below the drain pipe waste water closure protection device in the waste water pipe. Embodiment drain pipe waste water closure protection devices are easily installed in existing or new drains. Embodiments have two radial disc seals which insure a strong seal between the drain pipe waste water closure protection device and the drain wall. Embodiments include a reinforcing band embedded below the radial disc seals which prevents failure of the radial disc seals. Embodiments include a quadruple pressure accumulating seal which protects against the flow of gas or fluid from the waste water pipe.

Abstract: An embodiment includes a drain pipe waste water closure protection device which allows passage of fluids through a drain into a pipe waste water closure and a waste water pipe while preventing backflow of fluid or gas from the waste water pipe and pipe waste water closure, as well as preventing evaporation of a water-containing pipe waste water closure located below the drain pipe waste water closure protection device in the waste water pipe. Embodiment drain pipe waste water closure protection devices are easily installed in existing or new drains. Embodiments have two radial disc seals which insure a strong seal between the drain pipe waste water closure protection device and the drain wall. Embodiments include a reinforcing band embedded below the radial disc seals which prevents failure of the radial disc seals. Embodiments include a quadruple pressure accumulating seal which protects against the flow of gas or fluid from the waste water pipe.

Abstract: An embodiment providing one or more improvements includes a drain trap seal which allows passage of fluids through a drain into a waste pipe while preventing backflow of fluid or gas from the waste pipe, as well as preventing evaporation or a water-containing trap seal located below the drain trap seal in the waste pipe. Embodiment drain trap seals are easily installed in existing or new drains. Embodiments have two annular ring seals which insure a strong seal between the drain trap seal and the drain wall. Embodiments include a reinforcing band embedded below the annular ring seals which prevents failure of the annular ring seals.

Abstract: An exemplary embodiment providing one or more improvements includes a positive acting sensor which detects the flow of water through a flat roof secondary or emergency roof drain. In embodiments a signal from the sensor is conveyed by a conductor or by wireless means to an alarm box. In embodiments the alarm box provides an audible and or a visual signal indicating a minimal water flow in the secondary drain.

Abstract: An exemplary embodiment providing one or more improvements includes an assembly which fixes and supports a floor drain at the appropriate position before a concrete floor is poured. The assembly is adjustable for floors of varying thickness. The lower or second end of the drain pipe is protected against contamination by wet concrete by a resilient disk. In addition a cavity on the bottom of the floor concentric with the drain pipe is formed. After the concrete floor has hardened and the form removed the resilient disk is removed exposing a clean uncontaminated drain pipe end for connection to a riser pipe.

Abstract: An exemplary embodiment providing one or more improvements includes a piping system including a test tee, the test tee comprised of a cleanout tee having an access port, a plug for the access port, a chamber, a test plug which can be inserted into the chamber and removably attached at the top of the chamber thereby blocking the lumen of the test tee. A test port is located in the test tee above the test plug, and a nipple with a valve and a spigot with connections for a hose is inserted into the test port. In testing the integrity of the piping system, the test plug is inserted through the access port into the chamber and is attached at the top of the chamber, thereby closing the lumen of the system. Other drains in the system are closed, and water is inserted into the system, optionally through the nipple. After the integrity of the system is determined, the water is drained from the system through the nipple, the test plug is removed from the chamber, and the access port plug is replaced.

Abstract: The wall hydrant is automatically draining, providing freeze resistant, and includes protections against contamination of a building's potable water supply from the backflow of water in an attached hose. In particular, a dual check hose connection backflow preventer provides protection against back pressure from a hose fill of water which is elevated 10 feet. In addition, protection is provided from back siphonage due to a reduction of pressure in the potable water system within the building. Finally, a biased open atmospheric vent is located between the two independent checks to further assure the protection against backflow from the hose to the potable water system.