A rigid piston assembly for use in a conventional flush valve includes a rigid piston and a solenoid configured to fixedly engage within the valve body. A flush valve for a plumbing fixture as well as a method of retrofitting a piston valve into a diaphragm flush valve body which includes a rigid piston and solenoid configuration.

A rigid piston assembly for use in a conventional flush valve includes a rigid piston and a solenoid configured to fixedly engage within the valve body. A flush valve for a plumbing fixture as well as a method of retrofitting a piston valve into a diaphragm flush valve body which includes a rigid piston and solenoid configuration.

A rigid piston assembly for use in a conventional flush valve includes a rigid piston and a solenoid configured to fixedly engage within the valve body. A flush valve for a plumbing fixture as well as a method of retrofitting a piston valve into a diaphragm flush valve body which includes a rigid piston and solenoid configuration.

The invention relates to a pressure-flushing system (100) for toilet bowls, comprising a cistern mounting (500) and a drain module (200), said drain module (200) comprising a vertically oriented pressurized water tank (501) and a drain pipe (502), a hydraulic drain valve (18) and a DC pipe interrupter (5). The drain pipe (502) is mounted vertically in the pressurized water tank (501) and projects from the bottom of the pressurized water tank (201) for a flow connection with the toilet bowl. The drain module (200) is retained by the cistern mounting (500), which also carries a gas accumulator (19). The cistern mounting (500) has a water-carrying design and has a water connection (8) for connection to a drinking water mains or similar, and connecting channels (507, 510) that fluidically connect the pressurized water tank (501) and the gas accumulator. The pressure-flushing system (100) complies with standard EN 1717, is compact and easy to install. It allows pressure-wave flushing with little water and low noise emission.

The invention relates to a pressure-flushing system (100) for toilet bowls, comprising a cistern mounting (500) and a drain module (200), said drain module (200) comprising a vertically oriented pressurized water tank (501) and a drain pipe (502), a hydraulic drain valve (18) and a DC pipe interrupter (5). The drain pipe (502) is mounted vertically in the pressurized water tank (501) and projects from the bottom of the pressurized water tank (201) for a flow connection with the toilet bowl. The drain module (200) is retained by the cistern mounting (500), which also carries a gas accumulator (19). The cistern mounting (500) has a water-carrying design and has a water connection (8) for connection to a drinking water mains or similar, and connecting channels (507, 510) that fluidically connect the pressurized water tank (501) and the gas accumulator. The pressure-flushing system (100) complies with standard EN 1717, is compact and easy to install. It allows pressure-wave flushing with little water and low noise emission.

The present invention discloses an electronic flush valve system for tankless water fixtures, comprising a valve housing and a replaceable flush valve module removably secured within the valve housing. The flush valve module is comprised of an independent, self-contained flush valve configured as a replaceable flush valve cartridge.

A flush water tank apparatus has a reservoir tank, a discharge valve, a discharge valve hydraulic drive portion configured to drive the discharge valve, and a discharge/vacuum break valve device configured to supply the water supplied from the upstream side to the discharge valve hydraulic drive portion on a downstream side. The discharge valve hydraulic drive portion includes a cylinder, and a piston configured to be moved by a pressure of the water flowing into the cylinder to move the discharge valve. The discharge/vacuum break valve device includes a valve body that operates to discharge the water flowing backward from the discharge valve hydraulic drive portion while opening the upstream side to an atmosphere when the supply of the water from the upstream side is stopped.

A flush water tank apparatus has a reservoir tank, a discharge valve, a discharge valve hydraulic drive portion configured to drive the discharge valve, and a discharge/vacuum break valve device configured to supply the water supplied from the upstream side to the discharge valve hydraulic drive portion on a downstream side. The discharge valve hydraulic drive portion includes a cylinder, and a piston configured to be moved by a pressure of the water flowing into the cylinder to move the discharge valve. The discharge/vacuum break valve device includes a valve body that operates to discharge the water flowing backward from the discharge valve hydraulic drive portion while opening the upstream side to an atmosphere when the supply of the water from the upstream side is stopped.

An anti-siphon structure for a tankless pressure flushing toilet, that comprises: a main body, on which is disposed a water passage channel, the main body is connected to a water output end of a water supply pipe; a movable valve core set, disposed in the main body, to open or close water flowing through the water passage channel; a first check valve, connected to a water output end of the main body, a water output end of the first check valve is connected to a pressure water tank of a toilet seat; and a vacuum breaker, disposed at a side of a front end of the movable valve core set, and is connected to the water passage channel. A second check valve is disposed at the water input end of the main body.

An anti-siphon structure for a tankless pressure flushing toilet, that comprises: a main body, on which is disposed a water passage channel, the main body is connected to a water output end of a water supply pipe; a movable valve core set, disposed in the main body, to open or close water flowing through the water passage channel; a first check valve, connected to a water output end of the main body, a water output end of the first check valve is connected to a pressure water tank of a toilet seat; and a vacuum breaker, disposed at a side of a front end of the movable valve core set, and is connected to the water passage channel. A second check valve is disposed at the water input end of the main body.