Code requirements for excess pressure in domestic water systems

摘要

Most model plumbing codes require pressure reducing valves (PRVs) on domestic water systems where the water pressure exceeds 80 pounds per square inch. When higher pressures are exposed to plumbing systems there is the possibility of pipes or china fixtures rupturing and causing injuries to people and water damage to the building. In most cases, high water pressures can waste water, because higher pressures generally force more water out of the faucet or fitting. There are many applications where PRVs may be required to reduce high pressures and to maintain a constant lower pressure for proper operation of a system or piece of equipment.