Plumbing Pressure Relief Valve Applications
The most common applications include:
Water heaters - storage type hot water heaters utilize T&P or Temperature & Pressure type relief valves which combine protection from both over-pressure and over-temperature, while tankless water heaters use pressure-only relief valves.
Pumps - installed after a pump, relief valves help to protect the equipment and components from excessive pressure caused by blockage in the line, over-pumping (malfunctions/incorrect settings) and other conditions.
Water & well tanks - installed on the supply line leading to a water storage tank, they can effectively protect the tank from excessive pressure.
Plumbing PRV Types
- Water heater PRV's - a general name given to relief valves used with storage and tankless water heaters.
- T&P relief valves - these incorporate protection both from over-temperature and over-pressure. Commonly used with storage type water heaters, indirect tanks and other hot water vessels.
- Cold water water PRV's - a general name for relief valves with no test lever, intended for use on fresh water pump lines, well tanks or next to pressure regulating valves.
