The invention relates to a device (2) for automatically flushing liquid lines, in particular drinking water lines, with at least one connection (4) for a water conduit, with at least one connection (6) for a wastewater conduit, and with a flushing valve (8) which is arranged between the connections for the water conduit and wastewater conduit. The object of providing a device for automatic flushing that allows a flushing behaviour which is better tailored to the conditions is achieved in that the flushing valve (8) comprises a multiple valve with parallel valves (10). The invention further relates to a system of water lines and to a method for automatically flushing water lines using a device according to the invention.

The invention relates to a device (2) for automatically flushing liquid lines, in particular drinking water lines, with at least one connection (4) for a water conduit, with at least one connection (6) for a wastewater conduit, and with a flushing valve (8) which is arranged between the connections for the water conduit and wastewater conduit. The object of providing a device for automatic flushing that allows a flushing behaviour which is better tailored to the conditions is achieved in that the flushing valve (8) comprises a multiple valve with parallel valves (10). The invention further relates to a system of water lines and to a method for automatically flushing water lines using a device according to the invention.

A contamination unit for isolating a building from contamination of a sewer is disclosed. The contamination unit includes a housing with an inlet and an outlet, a trap assembly, and a fluid trigger. The inlet is in fluid communication with a fluid source, plumbing equipment, and/or condensating equipment to receive fluid. The housing has a reservoir to collect the fluid therein and to define a reservoir portion of a contamination barrier about the outlet. The trap assembly includes a trap conduit between the outlet and the sewer that is shaped to collect the fluid therein and define a trap portion of the contamination barrier. The fluid trigger is positionable about the housing to selectively release the fluid through the inlet and into the reservoir of the housing whereby the fluid in the contamination barrier is maintained to prevent the contamination from passing from the sewer into the building.

A contamination unit for isolating a building from contamination of a sewer is disclosed. The contamination unit includes a housing with an inlet and an outlet, a trap assembly, and a fluid trigger. The inlet is in fluid communication with a fluid source, plumbing equipment, and/or condensating equipment to receive fluid. The housing has a reservoir to collect the fluid therein and to define a reservoir portion of a contamination barrier about the outlet. The trap assembly includes a trap conduit between the outlet and the sewer that is shaped to collect the fluid therein and define a trap portion of the contamination barrier. The fluid trigger is positionable about the housing to selectively release the fluid through the inlet and into the reservoir of the housing whereby the fluid in the contamination barrier is maintained to prevent the contamination from passing from the sewer into the building.

A hybrid flushing system for water free urinals is presented with a housing having a wall portion forming a cavity for receiving a cartridge. The housing also includes a flushing fluid inlet portion for receiving a flushing fluid and a flushing fluid directing portion configured to direct the flushing fluid. A cartridge for installation into a housing is presented, including a cartridge wall, a flushing fluid receiving portion and a flushing fluid directing portion to direct flushing fluid received to any portion to clean areas of the housing, the cartridge, and connected plumbing. Steps for cleaning a hybrid flushing system are presented with an act of directing a flushing fluid into an area, where the area is one of a cartridge for a hybrid flushing system, a housing for a hybrid flushing system, and a plumbing system connected with the hybrid flushing system.

A hybrid flushing system for water free urinals is presented with a housing having a wall portion forming a cavity for receiving a cartridge. The housing also includes a flushing fluid inlet portion for receiving a flushing fluid and a flushing fluid directing portion configured to direct the flushing fluid. A cartridge for installation into a housing is presented, including a cartridge wall, a flushing fluid receiving portion and a flushing fluid directing portion to direct flushing fluid received to any portion to clean areas of the housing, the cartridge, and connected plumbing. Steps for cleaning a hybrid flushing system are presented with an act of directing a flushing fluid into an area, where the area is one of a cartridge for a hybrid flushing system, a housing for a hybrid flushing system, and a plumbing system connected with the hybrid flushing system.

A drainage structure has: a bathtub (first wet area fixture) at which waste water becomes collect-and-flow waste water that is drained after having been collected; a wash place (second wet area fixture) at which waste water becomes continuous waste water that is not collected; a first drainage trap that is provided at a drain of the bathtub; a second drainage trap that is provided at the wash place; a first bypass pipe that connects a drainage pipe (downstream side region) of the first drainage trap and a drainage pipe (downstream side region) of the second drainage trap, at least a portion of the first bypass pipe being positioned higher than both the first drainage trap and the second drainage trap; a first siphoning drainage pipe that is connected to a downstream side of the first drainage trap and to a downstream side of the first bypass pipe; and a second siphoning drainage pipe that is connected to a downstream side of the second drainage trap and to a downstream side of the first bypass pipe.

A check valve includes a plate-shaped valve seat member provided with a fluid discharge port, a plate-shaped valve member provided on a downstream side of the valve seat member and configured to open/close the discharge port, a coil spring provided on a downstream side of the valve member and configured to bias the valve member toward the discharge port, a spring receiving member provided for the coil spring on a downstream side thereof, and a plurality of guide rods provided at the periphery of the valve member and formed to extend in an upstream-to-downstream flow direction, each having a downstream end portion attached to the spring receiving member, and configured to guide the valve member in the upstream-to-downstream flow direction.

A contamination unit for isolating a building from contamination of a sewer is disclosed. The contamination unit includes a housing with an inlet and an outlet, a trap assembly, and a fluid trigger. The inlet is in fluid communication with a fluid source, plumbing equipment, and/or condensating equipment to receive fluid. The housing has a reservoir to collect the fluid therein and to define a reservoir portion of a contamination barrier about the outlet. The trap assembly includes a trap conduit between the outlet and the sewer that is shaped to collect the fluid therein and define a trap portion of the contamination barrier. The fluid trigger is positionable about the housing to selectively release the fluid through the inlet and into the reservoir of the housing whereby the fluid in the contamination barrier is maintained to prevent the contamination from passing from the sewer into the building.

A hybrid flushing system for water free urinals is presented with a housing having a wall portion forming a cavity for receiving a cartridge. The housing also includes a flushing fluid inlet portion for receiving a flushing fluid and a flushing fluid directing portion configured to direct the flushing fluid. A cartridge for installation into a housing is presented, including a cartridge wall, a flushing fluid receiving portion and a flushing fluid directing portion to direct flushing fluid received to any portion to clean areas of the housing, the cartridge, and connected plumbing. Steps for cleaning a hybrid flushing system are presented with an act of directing a flushing fluid into an area, where the area is one of a cartridge for a hybrid flushing system, a housing for a hybrid flushing system, and a plumbing system connected with the hybrid flushing system.