Described is a fluid control valve suitable to permit only gravitationally induced flow. The valve includes an inlet section in the form of a self-supporting trough-shaped section and an outlet section. The outlet section is formed from a flexible resilient material connected to the inlet section. The outlet section includes a sealing area with side gussets that hold a set of sealing surfaces of the sealing area apart from each other, where the sealing area is connected with the inlet section at its upper edge.

Described is a fluid control valve suitable to permit only gravitationally induced flow. The valve includes an inlet section in the form of a self-supporting trough-shaped section and an outlet section. The outlet section is formed from a flexible resilient material connected to the inlet section. The outlet section includes a sealing area with side gussets that hold a set of sealing surfaces of the sealing area apart from each other, where the sealing area is connected with the inlet section at its upper edge.

The present invention is related with the accessory manufacturing industry for products such as faucets, showers, floaters, toilet seats, among others. It is more specifically related with the manufacturing of valves for dry urinals that allow the passing through of the urine and prevent the return of unpleasant odors. The invention consists in an assembled valve for the urinal's exit with a more efficient seal, characterized for including in a main body with bonding means, a superior one to fixate to a urinal and an inferior one to fixate to the plumbing that will hydraulically connect the main body of the valve to the drain exit. In the superior ending, this main body includes a pierced disc, where the urination will directly impinge, in the interior, slightly beneath half, the structure includes a disc with a centered orifice, this disc in its inferior face has a tubular projection that will be obstructed or liberated by the valve component of the valve's assemble; such inferior internal disc in its upper part has a very opened conic configuration.

The present invention is related with the accessory manufacturing industry for products such as faucets, showers, floaters, toilet seats, among others. It is more specifically related with the manufacturing of valves for dry urinals that allow the passing through of the urine and prevent the return of unpleasant odors. The invention consists in an assembled valve for the urinal's exit with a more efficient seal, characterized for including in a main body with bonding means, a superior one to fixate to a urinal and an inferior one to fixate to the plumbing that will hydraulically connect the main body of the valve to the drain exit. In the superior ending, this main body includes a pierced disc, where the urination will directly impinge, in the interior, slightly beneath half, the structure includes a disc with a centered orifice, this disc in its inferior face has a tubular projection that will be obstructed or liberated by the valve component of the valve's assemble; such inferior internal disc in its upper part has a very opened conic configuration.

Disclosure provides mechanical odor trap mechanism that can be coupled anywhere in the plumbing of a urinal system below the operative base. A receptacle is provided to receive and discharge the fluid from the urinal via a floatation device that is configured to float in the presence of fluid and settle down into the discharge opening in the absence of fluid to sealingly close the opening and block the escape of odor. A self cleaning urinal system can be configured to implement such mechanical odor trap mechanism and further be configured with spraying mechanism disposed at an elevation to spray water and/or air jets to wash away splattered fluid residue. A feces, urine and wash water separating toilet pan can be provided with a lid configured to sealingly close the opening for feces to enable washing without the user shifting positions and also to block odor.

Disclosure provides mechanical odor trap mechanism that can be coupled anywhere in the plumbing of a urinal system below the operative base. A receptacle is provided to receive and discharge the fluid from the urinal via a floatation device that is configured to float in the presence of fluid and settle down into the discharge opening in the absence of fluid to sealingly close the opening and block the escape of odor. A self cleaning urinal system can be configured to implement such mechanical odor trap mechanism and further be configured with spraying mechanism disposed at an elevation to spray water and/or air jets to wash away splattered fluid residue. A feces, urine and wash water separating toilet pan can be provided with a lid configured to sealingly close the opening for feces to enable washing without the user shifting positions and also to block odor.

A system and method for inserting removable drain valve within an inlet opening of a drain basin and then sealing the drain valve within the drain basin. The removable drain valve has a cylindrical housing with a check valve disposed with an outlet of the drain basin to allow drain water to flow out from the outlet of the drain basin while blocking flow from the outlet of the drain basin to the inlet of the drain basin.

A system and method for inserting removable drain valve within an inlet opening of a drain basin and then sealing the drain valve within the drain basin. The removable drain valve has a cylindrical housing with a check valve disposed with an outlet of the drain basin to allow drain water to flow out from the outlet of the drain basin while blocking flow from the outlet of the drain basin to the inlet of the drain basin.

A backflow prevention apparatus is provided with a check valve and a float-type backflow prevention valve, these being installed in this order as one proceeds from upstream to downstream. The check valve comprises a valve seat; a valve member that closes the valve at the valve seat due to an upwardly directed restoring force; and a restoring force exerting member that exerts an upwardly directed restoring force on the valve member. The float-type backflow prevention valve comprises an annular valve seat; a float that rises in accompaniment to a rise in a water level of wastewater to close the valve at the annular valve seat; a guide member that guides movement of the float in a vertical direction; and a constraining member that constrains a lowermost position to which the float can move.

A drainage fitting (10) is described. The drainage fitting (10) comprises a housing (12) adapted to be inserted into a drainage outlet, the housing defining a housing inlet (14) and a housing outlet (16) and a one way valve (18) adapted to be received within the housing (12). The one way valve (18) has a body defining a valve inlet (22), a valve outlet (24) and a valve passageway (26), the passageway (26) providing fluid communication between the housing inlet (14) and the housing outlet (16). The drainage fitting (10) further comprises a fitting insert (28) adapted to be located in the housing inlet (14), the fitting insert (28) defining an insert portion (30) adapted to extend through the valve inlet (22) and into the valve passageway (26). In the presence of a negative pressure differential, air can pass through the valve (18) to relieve the pressure differential, but in the event of a positive pressure differential, the insert portion (30) prevents the one way valve from inverting to relieve the pressure differential.