The present invention relates to a reinforcement valve for preventing a backflow in a drain trap, which can be additionally installed inside a drain trap, which can perform the air backflow phenomenon pre-contributing to the quality of the quality of the drain trap and to performance improvement thereof, and which always has the best backflow blocking function regardless of a strong air pressure generated inside the drain trap and any change thereof. A conventional drain trap has a water gathering portion (20) formed beneath a trap body (10); an inflow-side drain tube (30) and a discharged-side drain tube (40) are connected to one side and the other side thereof, respectively, such that draining occurs therethrough; a blocking membrane (60) is configured between the water inflow opening (31) And the water discharge opening (41); and a water drain hole (51) is bored between the blocking membrane (60) and the bottom surface inside the trap body (10). Th e present invention is configured by installing a backflow-preventing reinforcement valve (100) on the front side of the blocking membrane (60), in which the water drain hole (51) is formed, such that, when water is drained from the corresponding household, the same is automatically opened by the water pressure, thereby allowing water to drain, and, when water draining is completed, the same is automatically closed by self-weight, thereby guaranteeing, through control, that, even if a strong air flow is introduced into the drain trap, no backflow of air occurs.

A water trap for use in connection with a wash basin or other plumbing fixture includes a housing, an inlet extending into the housing and an outlet extending out of the housing. The water trap also includes a weir inside the housing between the inlet and the outlet, and a trap chamber defined by the space within the housing on an upstream side of the weir. The trap chamber is designed to retain liquid following a drain cycle from the wash basin or other plumbing fixture.

A water trap for use in connection with a wash basin or other plumbing fixture includes a housing, an inlet extending into the housing and an outlet extending out of the housing. The water trap also includes a weir inside the housing between the inlet and the outlet, and a trap chamber defined by the space within the housing on an upstream side of the weir. The trap chamber is designed to retain liquid following a drain cycle from the wash basin or other plumbing fixture.

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 waterless urinal for a vehicle, the urinal including a fluid bowl having a drain, and a waterless urinal cartridge disposed within the drain. The cartridge includes a housing having a waste reservoir disposed within the housing that holds a predetermined volume of urine, and a drainage aperture configured so that an amount of urine exceeding the predetermined volume of urine flows through the drainage aperture to exit the housing. A cover is coupled to the housing and forms part of a surface contour of the bowl, the cover includes a sealing fluid reservoir and fluid passages for directing urine from the bowl to the sealing fluid reservoir. The sealing fluid reservoir is in conmmnication with an internal cavity of the housing, the waste reservoir includes at least one fluid flow control feature configured to restrain urine movement within the waste reservoir in response to a change in vehicle dynamics.

A drain trap assembly comprises an upper housing and an access fitting removably attached thereto. The upper housing includes a main body defining an open bottom end, an inlet pipe extending through the main body in a vertical direction and exiting through the open bottom end, and an outlet pipe extending from an annular sidewall of the main body. The access fitting is removably attached to the main body for selectively covering the open bottom end and defines a fluid reservoir in communication with the inlet pipe and the outlet pipe.

A drain trap assembly comprises an upper housing and an access fitting removably attached thereto. The upper housing includes a main body defining an open bottom end, an inlet pipe extending through the main body in a vertical direction and exiting through the open bottom end, and an outlet pipe extending from an annular sidewall of the main body. The access fitting is removably attached to the main body for selectively covering the open bottom end and defines a fluid reservoir in communication with the inlet pipe and the outlet pipe.

A trap seal protection device may provide an evaporation barrier for a drain and reduce odors and gases emitting from the drain. The trap seal protection device includes a housing including a flange engaging a radial surface of a drain assembly to support the housing relative to the drain assembly, a gasket coupled to the housing, the gasket having an outer diameter engaging an inner diameter of the drain assembly, a seal member positioned within the housing and selectively forming a seal against the housing. The seal member is movable to permit fluid flow through the trap seal protection device, wherein an axial distance between the flange and the seal member is greater than the outer diameter of the gasket.

A trap seal protection device may provide an evaporation barrier for a drain and reduce odors and gases emitting from the drain. The trap seal protection device includes a housing including a flange engaging a radial surface of a drain assembly to support the housing relative to the drain assembly, a gasket coupled to the housing, the gasket having an outer diameter engaging an inner diameter of the drain assembly, a seal member positioned within the housing and selectively forming a seal against the housing. The seal member is movable to permit fluid flow through the trap seal protection device, wherein an axial distance between the flange and the seal member is greater than the outer diameter of the gasket.