Fixture shutoff valves are located next to or underneath the toilet and sink and can shut off the water supply to these particular fixtures if required. You may need to do so if a sink or toilet is leaking or flooding.

Several different systems make up a house's water systems. Fresh water is delivered to a home through water supply pipes from the utility or a well and is then distributed to sinks, toilets, washers, bathtubs, and related fixtures. The drain-waste-vent system carries away used water and wastes to sewers or septic tanks.

An anti-hammer device softens the impact of water rapidly stopping at a point in the water line where an appliance is connected. Appliances rapidly shut water on and off, which causes the water volume to slam into the end of the run and suddenly stop. This creates a hammering affect which can harm the appliance. Modern water systems codes require a