There is an inflow pipe and an intermediate pipe and an outflow pipe forming a passageway there through. The intermediate pipe has an internal surface with a radius of curvature. The outflow pipe is coupled to the intermediate pipe. There is a baffle located within the passageway. The baffle has a lower extent which is a second distance from the first radius of curvature of the internal surface of the intermediate pipe. The second distance is less than the first distance of the radius of curvature of the intermediate pipe.

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 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 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.

A multi-layer water sealing device, includes at least two layers of water seal sequentially arranged from top to bottom. An upper-layer water seal has a floating bell-shaped cover structure, and the floating bell-shaped cover structure includes a water sealing box and a floating bell-shaped cover arranged in the water sealing box. A lower-layer water seal is arranged in a drain pipe below the floating bell-shaped cover, and one side of the water sealing box is extended to form or connected to a communication cavity offset from the drain pipe. The floating bell-shaped cover correspondingly is extended to form or connected to a floating component floatable in the communication cavity and offset from the drain pipe.

A multi-layer water sealing device, includes at least two layers of water seal sequentially arranged from top to bottom. An upper-layer water seal has a floating bell-shaped cover structure, and the floating bell-shaped cover structure includes a water sealing box and a floating bell-shaped cover arranged in the water sealing box. A lower-layer water seal is arranged in a drain pipe below the floating bell-shaped cover, and one side of the water sealing box is extended to form or connected to a communication cavity offset from the drain pipe. The floating bell-shaped cover correspondingly is extended to form or connected to a floating component floatable in the communication cavity and offset from the drain pipe.

Disclosed is a bottle trap having a main body having an open end coupled to a tailpiece pipe and a tapered closed end having at least one face inclined at a first angle with respect to axis of the main body. The bottle trap also includes a cylindrical trap element received on the open end and extending axially into the main body up to at least half the length of the main body. An outlet orifice is configured on peripheral surface of the main body perpendicularly thereto. The outlet orifice is adapted to be coupled to a horizontal drain pipe. Also, a thread-less coupling is configured at the open end and outlet orifice, respectively, for connecting the tailpiece pipe and the drain pipe, respectively, thereto for ensuring a leak-proof coupling. Moreover, at least one sealable drain orifice is configured at the at least one inclined face of the tapered closed end.

Disclosed is a bottle trap having a main body having an open end coupled to a tailpiece pipe and a tapered closed end having at least one face inclined at a first angle with respect to axis of the main body. The bottle trap also includes a cylindrical trap element received on the open end and extending axially into the main body up to at least half the length of the main body. An outlet orifice is configured on peripheral surface of the main body perpendicularly thereto. The outlet orifice is adapted to be coupled to a horizontal drain pipe. Also, a thread-less coupling is configured at the open end and outlet orifice, respectively, for connecting the tailpiece pipe and the drain pipe, respectively, thereto for ensuring a leak-proof coupling. Moreover, at least one sealable drain orifice is configured at the at least one inclined face of the tapered closed end.

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.