Your Homes Plumbing System. Bathtubs and lavatories can have overflows installed. These two fixtures are often used without close observation. A person preparing to take a bath will typically turn on the water and leave while the tub is filling up. If left for a long time, the tub water may rise to a height where the overflow will take the excess water to the drain, preventing flooding of the area. Many tubs are capable of supplying water at rates greater than the flow rate of the overflow. With such fixtures, overflowing and flooding may not be prevented.
The bidet is a small bathing fixture used by both sexes. It is not designed for the elimination of human waste, but for cleaning the perineal area, and other body parts, including feet. It is typically equipped with a water spray that directs water upward in a jet towards a body part.
Most bidets present back-siphonage problems because the spray nozzle is located below the flood-level rim of the fixture. The water supply to a bidet should have protection against backflow. The temperature of the discharging water from a bidet should be limited to a maximum temperature of 110 F (43 C) by a water temperature-limiting device. This temperature device is required because of the potential for scalding sensitive parts of the body.
Where a lavatory does have an overflow installed, the cross-sectional area of the overflow should have a minimum of 1-1/8 inches (726 mm). This minimum prevents the overflow from being too small, which could promote bacterial and micro-organism growth. The overflow should be able to prevent overflowing of the sink for a minimum of five minutes when tested from the onset of water flowing into the overflow’s opening.
Bathtubs are made from many different types of materials, including enameled cast-iron, porcelain-enameled steel, and plastic. Plastic tubs are made from materials such as ABS, PVC, fiberglass, fiberglass-reinforced plastic, acrylic, and cultured-marble acrylic. Bathtubs that are equipped with shower fixtures should be manufactured with slip-resistant surfaces. Bathtubs should have a drainage outlet (tailpiece) with a minimum diameter of 1-1/2 inches (38 mm). Every tub should be equipped with a stopper. The bathtub should have an overflow outlet installed. The overflow prevents flooding if the tub is being filled while unattended, and prevents overflow of the water when a person enters a tub that is full.
Many injuries in a dwelling are related to accidents in the bathtub or shower. The minimum opening requirements for access and egress allows an adult enough room to safely step into and exit the shower area without having to twist or turn through a narrow opening. The shower opening (or access and egress opening) should be at least 22 inches (559 mm) of clear and unobstructed finish-width. The 22-inch width is based on the approximate shoulder width of an average-sized adult. This minimum opening dimension also provides comfortable access to service the valves, showerheads and drain. It allows for emergency response and rescue access, and emergency egress.
The Barrie Home Inspector is trained to inspect your homes complete plumbing system. He will inspect your supply lines to waste drains and check all your plumbing fixtures. Protect your next real estate purchase by having a professional home inspection.