A drain assembly for a sink has an abutment surface (14) for abutting an underside of the sink around the drain aperture, and a first wall portion (16) circumscribing an upper drain volume (18). A down-flow conduit (20) and an up-flow conduit (24) are delineated by a second and third wall portions (22, 26), one of which has an edge defining a lip (28) between the down-flow conduit (20) and up-flow conduit (24). An outlet (30) is connected to up-flow conduit (24). A removable lower cover (32) attaches to the wall portions so as to complete a flow path from the down-flow conduit (20) to the up-flow conduit (24) so as to form a trap. At least the first, second and third wall portions (16, 22, 26) and the outlet (30) are integrally formed as a unitary body, most preferably by an injection molding process.

A drain assembly for a sink has an abutment surface (14) for abutting an underside of the sink around the drain aperture, and a first wall portion (16) circumscribing an upper drain volume (18). A down-flow conduit (20) and an up-flow conduit (24) are delineated by a second and third wall portions (22, 26), one of which has an edge defining a lip (28) between the down-flow conduit (20) and up-flow conduit (24). An outlet (30) is connected to up-flow conduit (24). A removable lower cover (32) attaches to the wall portions so as to complete a flow path from the down-flow conduit (20) to the up-flow conduit (24) so as to form a trap. At least the first, second and third wall portions (16, 22, 26) and the outlet (30) are integrally formed as a unitary body, most preferably by an injection molding process.

An in-drain sealing apparatus for being positioned in a drain pipe with an interior surface where the positioning is below a surface mounted grate in a room area. The drain sealing apparatus includes a connector ring defined by a center axis, a lower edge and a peripheral surface, the connector ring positioned in the drain pipe below the grate with a first cylindrical space defined between the drain pipe interior surface and the connector ring peripheral surface. A sealing member is positioned in the first space for sealing the first cylindrical space between the peripheral surface of the connector ring and interior surface of the drain pipe for preventing access from the drain pipe to the room area through the region between the connector ring and the drain pipe. A normally close sealing device is coupled to the connector ring whereby liquid flowing through the grate area into the drain will cause the normally closed sealing device to open allowing the liquid into the drain pipe and then return to its normally closed position when liquid ceases to flow through into the grate.

An in-drain sealing apparatus for being positioned in a drain pipe with an interior surface where the positioning is below a surface mounted grate in a room area. The drain sealing apparatus includes a connector ring defined by a center axis, a lower edge and a peripheral surface, the connector ring positioned in the drain pipe below the grate with a first cylindrical space defined between the drain pipe interior surface and the connector ring peripheral surface. A sealing member is positioned in the first space for sealing the first cylindrical space between the peripheral surface of the connector ring and interior surface of the drain pipe for preventing access from the drain pipe to the room area through the region between the connector ring and the drain pipe. A normally close sealing device is coupled to the connector ring whereby liquid flowing through the grate area into the drain will cause the normally closed sealing device to open allowing the liquid into the drain pipe and then return to its normally closed position when liquid ceases to flow through into the grate.

An apparatus senses the proportion of FOG flowing with effluent from a sink to a p-trap. A pipe portion is connectable for use as a tailpipe for a sink with a first electrode within the pipe portion and a second electrode outside the pipe portion. Conductors connect the first and second electrodes to a capacitance sensor, so changes in capacitance between the electrodes caused by changes in proportions of FOG content in effluent from the sink can be detected and/or monitored. The monitoring can be remote and can cause an action when an excess FOG content is detected.

Disclosed is a positive and negative pressure resistant sealing apparatus of a balance shaft two-way valve plate used for a drainage pipeline, which relates to the technical field of sewer line water seal protection. The apparatus comprises: a main body, a pressure conductor and a balance shaft two-way powered valve plate; the main body comprises a pressure conduction cavity and a drainage cavity, the pressure conduction cavity is located on one side of the drainage cavity, and the pressure conductor is arranged in the pressure conduction cavity of the main body. In the present invention, the effects of a pressure conduction membrane, a transmission connecting rod and the pressure conductor make it so that when the pressure at an upper end of a water seal is greater than the pressure at the lower end, a pressure membrane abuts against and holds in place the pressure conductor, causing the pressure conductor to have a downward movement trend, and causing the pressure conductor to push the transmission connecting rod, further causing the transmission connecting rod to abuts against and hold in place a supporting rod, preventing the supporting rod from forming a rotating trend to push the balance shaft two-way powered valve plate, further preventing the balance shaft two-way powered valve plate from driving an opening and closing valve plate to open, and thereby effectively preventing odor from spreading in the sewer pipeline.

A drain trap for plumbing fixtures that contains integrated access piping that allow a user to easily and efficiently to clean the drain trap. The drain trap includes a U-shaped plumbing trap, a first access pipe, a second access pipe, a first sealing cap, a second sealing cap, and a cleaning brush. The first access pipe and the second access pipe are positioned adjacent to a curved portion pipe of the U-shaped plumbing trap. The first access pipe and the second access pipe each laterally traverse into the curved portion pipe to provide access to the cleaning brush. The first sealing cap is adjacently connected to the first access pipe. Similarly, the second sealing cap is adjacently connected to the second access pipe for a water-tight seal. The first access pipe, the second access pipe, and the U-shaped plumbing trap are in fluid communication with each other.

A drain trap for plumbing fixtures that contains integrated access piping that allow a user to easily and efficiently to clean the drain trap. The drain trap includes a U-shaped plumbing trap, a first access pipe, a second access pipe, a first sealing cap, a second sealing cap, and a cleaning brush. The first access pipe and the second access pipe are positioned adjacent to a curved portion pipe of the U-shaped plumbing trap. The first access pipe and the second access pipe each laterally traverse into the curved portion pipe to provide access to the cleaning brush. The first sealing cap is adjacently connected to the first access pipe. Similarly, the second sealing cap is adjacently connected to the second access pipe for a water-tight seal. The first access pipe, the second access pipe, and the U-shaped plumbing trap are in fluid communication with each other.

This invention discloses a drainer that uses height-adjustable basket to control the height of floating body. It is characterized in that the drainer includes body, height-adjustable basket, floating body and water-saving component. The drainer body comprises a water inlet, inner cavity of drainer body, height adjustment column and the water outlet. The height-adjustable basket, floating body and water-saving component are alternately set in the drainer body, and the water-saving component is closer to the water outlet.

This invention discloses a drainer that uses height-adjustable basket to control the height of floating body. It is characterized in that the drainer includes body, height-adjustable basket, floating body and water-saving component. The drainer body comprises a water inlet, inner cavity of drainer body, height adjustment column and the water outlet. The height-adjustable basket, floating body and water-saving component are alternately set in the drainer body, and the water-saving component is closer to the water outlet.