If a home has a water pressure higher than 80 psi, what device should be installed?

When the water pressure in a home exceeds 80 psi, a pressure reducing valve should be installed to help regulate and lower that pressure to a safer level. Excessively high water pressure can lead to various problems, including stress on pipes, fixtures, and appliances, which can ultimately result in leaks or premature failure. By installing a pressure reducing valve, homeowners can ensure that the pressure remains within the optimal range, generally considered to be between 40 and 60 psi. This device effectively protects the plumbing system and contributes to the longevity of appliances such as water heaters and dishwashers, which can be damaged by high pressure.

Other devices listed may have their own specific functions. A booster pump, for instance, is typically used to increase water pressure when supply pressure is too low, rather than to decrease it. A pressure gauge measures the water pressure but does not regulate it, therefore it wouldn't solve the problem of excessive pressure. A flow restrictor is intended to limit the amount of water flow, which does not address the root cause of high pressure in the system. Hence, installing a pressure reducing valve is the most appropriate action in response to high water pressure.