Disclosed is a method for water saving by retrofitting an institutional plumbing fixture having a combination of an integral lavatory basin and a toilet bowel integrally attached thereto by inserting into the fixture a urinal-type collection receptacle having a water inlet opening on its top side and a water outlet opening on its bottom side; and fluidly interposing the receptacle via the inlet and outlet openings between the lavatory drain pipe and the drain trap provided for the plumbing fixture. Also disclosed is an institutional plumbing fixture retrofit for water saving, and a retrofit urinal-type receptacle.

A method of installing plumbing in a building, comprising the use of a plumbing support panel that enables outlet pipes and other plumbing pipes to be pre-assembled at the correct relative position with respect to each other for the installation of fixtures, and installed as a unit by mounting the panel to studs or to other parts of a building's structure. The panel comprises holes through which outlet pipes may be installed and mounting holes for the installation of pipe clamps to hold the pipes in place and for the mounting of the panel to a building's structure.

An apparatus to allow or stop an air flow into an enclosed environment or piping system comprises (a) a housing, (b) a first valve seat, (c) a first sealing member, (d) a second valve seat, (e) a second sealing member, (f) at least one locking mechanism configured to limit a movement of the first sealing member and/or the second sealing member; wherein the first sealing member moves away from the first valve seat when the second pressure is greater than the first pressure in a predetermined pressure difference; wherein the second sealing member moves away from the first valve seat when the third pressure is greater than the second pressure in a predetermined pressure difference; wherein the first pressure communicates with a system pressure in the piping system; and wherein the third pressure communicates with an ambient air pressure.

An assembly for connecting a wye fitting to another fluid conduit part of a fluid system includes the wye fitting, the other fluid conduit part and a clamshell fastener. The wye fitting defines a main fluid flow path along an axis A between a first end and a second end. An end of the wye fitting to be connected to the another fluid conduit part is provided with a plurality of first engagement features arranged circumferentially around the end of the wye fitting and an end of the another fluid conduit part is provided with a corresponding plurality of second engagement features arranged circumferentially around the end of the another fluid conduit part configured to engage with the first engagement features. The clamshell is secured around the end of the wye fitting and the another fluid conduit part over the interface between the first and second engagement features.

An assembly for connecting a wye fitting to another fluid conduit part of a fluid system includes the wye fitting, the other fluid conduit part and a clamshell fastener. The wye fitting defines a main fluid flow path along an axis A between a first end and a second end. An end of the wye fitting to be connected to the another fluid conduit part is provided with a plurality of first engagement features arranged circumferentially around the end of the wye fitting and an end of the another fluid conduit part is provided with a corresponding plurality of second engagement features arranged circumferentially around the end of the another fluid conduit part configured to engage with the first engagement features. The clamshell is secured around the end of the wye fitting and the another fluid conduit part over the interface between the first and second engagement features.

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 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 greywater control valve includes: a housing having an input port and at least two output ports; and an insert including a port connection element and a vent. A rotary greywater control valve includes: a housing including: an input port; a first output port; and a second output port; and an insert that rotates within the housing, the insert including: a connection channel that couples the input port to one of the first output port and the second output port; and a vent channel that couples the connection channel to one of the output ports. A fluid control valve includes: an input port located along a first axis; a first output port located along a second axis that is perpendicular to the first axis; a second output port located along the second axis; and a fluid channel that selectively couples the input port to one of the output ports.

A greywater control valve includes: a housing having an input port and at least two output ports; and an insert including a port connection element and a vent. A rotary greywater control valve includes: a housing including: an input port; a first output port; and a second output port; and an insert that rotates within the housing, the insert including: a connection channel that couples the input port to one of the first output port and the second output port; and a vent channel that couples the connection channel to one of the output ports. A fluid control valve includes: an input port located along a first axis; a first output port located along a second axis that is perpendicular to the first axis; a second output port located along the second axis; and a fluid channel that selectively couples the input port to one of the output ports.

A preassembled modular vacuum plumbing assembly for attaching a plumbing fixture to a water supply system and to a vacuum-assist waste removal system includes a frame having two upright members and at least one connecting member between the two upright members. At least one water supply conduit is attached to the frame, each water supply conduit having a first end configured for attachment to the water supply system and a second end configured for attachment to the plumbing fixture for providing water from the water supply system to the plumbing fixture. An accumulator is associated with the plumbing fixture for receiving and holding water provided by the at least one water supply conduit to the plumbing fixture. A wastewater outlet conduit is attached to the frame, the wastewater outlet conduit having a first end attached to the accumulator and a second end configured for attachment to the vacuum-assist waste removal system for directing water from the accumulator to the vacuum-assist waste removal system.