A drain valve structure contains: a body and a stop assembly. The body includes: an accommodation holder, a fixing holder, and a connection seat. The accommodation holder has a threaded groove, a through hole, and a threaded section. The fixing holder includes a first coupling segment, a connecting section, a second coupling segment, and a stepped orifice. The connection seat is connected with the second coupling segment and has an extension, a fitting segment, and an opening. The stop assembly includes a first ring, a second ring, and a third ring which are made of non-metal, the first ring is fixed on an inner wall of the threaded groove of the threaded section, the second ring is fitted with an inner wall of the stepped orifice of the fixing holder, and the third ring is fitted with an inner wall of the opening of the connection seat.

Water shortage is a serious problem all over the world. Everyday people use toilet many times and waste lots of water. Some toilet water tank uses half tank of water to flush the pee, but toilet still uses lots of water. In some area without water supply, restroom is very dirty without flush water. This invention can solve those problems with very low cost.

Currently, sewage water is discarded after people take shower, wash hands, clothes or food. If the discarded sewage water is collected, filtered and purified, it can be used as toilet flush water. The key factor for this invention is that the water for flushing the toilet does not require high purified quality, so the cost of filtration and purification is very low. This invention could save 30%-60% of the water used in daily life. For the existing building, this invention requires minor modification to separate the water pipes for toilet flush from other usage on both supply and discharge.

This invention also provides a cheap solution for the movable restroom or restroom without water supply pipe system. With two water tanks, one for water supply and one for sewage water collection, the toilet can be flushed with the discharged sewage water after simple filtration and purification with the initial water filling in the water tank.

A toilet installed in a bathroom includes a toilet bowl and a tank coupled to the toilet bowl. The tank can contain fluid for the toilet bowl. A rear surface of the tank is flush against a wall of the bathroom such that there is no gap between the tank and the wall and a bottom surface of the tank is flush against a floor of the bathroom such that there is no gap between the tank and the floor. The tank extends longitudinally above and below the toilet bowl and laterally outward past the toilet bowl such that a first side surface and a second side surface of the tank define outermost side peripheries of the toilet.

A drain box having a housing, a splash containment therein with a lower portion within a housing drain aperture, and a discharge conduit having a lower portion positioned within the splash containment in position above the drain aperture and extending upward through splash containment aperture, and an upper portion extending upward through a housing upper aperture and terminating above the housing upper portion for connection to an appliance discharge conduit. The conduit being attached to the housing to prevent a lower discharge conduit end from moving downward toward the drain aperture to less than a predetermined minimum distance above the housing drain aperture.

A compact residential house is disclosed which includes a pre-fabricated installation panel serving as an outer wall of the residential house and a lifeline system pre-installed on an outer surface of the pre-fabricated installation panel, the lifeline system including a grey water system.

An impact reducer for drainage stacks includes a first pipe section with a first internal passage having at least five alternating bends along its longitudinal axis, a bypass vent in a second pipe section having a second internal passage parallel to the longitudinal axis and a clean out plug in a third pipe section having a third internal passage at a radial angle with the longitudinal axis. First and second end fittings are located on the impact reducer for connecting the device to a drainage pipe. The impact reducer adjusts the turbulent flow of water falling in the drainage stack, converting the turbulent flow to laminar flow before the lower bend fitting of the drainage stack, which protects the lower bend fitting from impact shock.

The present inventive concept relates to a system (100) comprising: a water recirculating device comprising: a heating arrangement (112) arranged in a recirculating path (108); a mixing valve arrangement (122) in liquid communication with an external ON water path arrangement (114), said mixing valve arrangement (122) accepting as inputs hot and cold water from a hot and cold water source respectively, said mixing valve arrangement (122) being configured to form temperature regulated water (120) by combining said hot and cold water, said mixing valve arrangement (122) comprising a user input interface configured to control a proportion of said hot and cold water directed to said external water path arrangement (114); and a reference temperature determining arrangement (130) configured to determine a reference water temperature of said temperature regulated water (120); wherein said heating arrangement (112) is configured to adjust a water temperature of treated water towards said reference water temperature.

The presently disclosed technology generally provides a modular support system for plumbing connections. In one example, the system includes a frame, a connector that fits entirely in front of a support stud, and an optional housing. The frame includes symmetrical sides, each including a rail assembly. The connector includes first opposed sidewalls, each having a pair of boxways that receive the rails on any side of a frame unit to form a sliding joint between the frame and connector. Second opposed sidewalls include flexible tabs that engage frame corner flanges to prevent rearward disengagement of the connector from the frame. The housing includes structure for connection with the frame. The housing can be rotated for connection with the frame to receive vertical or horizontal plumbing lines. Connectors can connect the frame units in vertical or horizontal relation, or on either side of a building stud, or to brackets.

A bathroom module includes a shower area that includes a shower head, a control valve assembly, and a drain. The module also includes a toilet area including a toilet assembly and a transition area disposed between the shower area and the toilet area. The module also includes a shower area front wall and a shower area side wall, the shower area disposed along a first side of the shower area front wall and a first side of the shower area side wall. The module also includes a toilet area front wall and a toilet area side wall, the toilet area disposed along a first side of the toilet area front wall and a first side of the toilet area side wall. A grooming area includes a sink assembly that comprises a faucet, and the grooming area is disposed along a second side of at least one of the shower area front wall, the shower area side wall, the toilet area front wall, and the toilet area side wall.

Known walk-in bathtubs with doors typically use two dedicated pumps to help quickly empty the bathtub. Because space is limited under such bathtubs, the use of two pumps takes up a lot of the available space and is relatively expensive. According to the invention, there is provided a drain system for use with a walk-in bathtub that only requires one pump. The system includes: a motorized pump; and a controllable three-way valve having: an inlet for receiving fluid; a first outlet operatively connectable to the motorized pump for generating a whirlpool in the bathtub; and a second outlet operatively connectable to the motorized pump for pumping fluid out of the bathtub.