Somewhere in the house, usually when a faucet closes or the washing machine finishes filling, the pipes bang inside the walls. It's startling and it's annoying, but the part to take seriously is that it usually points to high pressure, and high pressure wears on your entire plumbing system.
When water pressure runs too high, everything downstream takes the strain, the joints, the faucets, the supply lines, the appliances, and the water heater most of all, since a tank holding excess pressure day after day tends to wear out years early. Some of the burst lines, blown fittings and early water heater failures in this county can trace back to pressure nobody ever measured. The pressure regulator, or PRV, sits between the street and your home's plumbing and keeps the pressure in a healthy range. Regulators wear out too, and a failing one lets full street pressure into the house without any sign.
This matters for two kinds of homes. The first is a home already showing the signs, the banging, the blasting showers, the appliances wearing out early. The second is a home that never had a regulator at all, which is more common than people think, and adding one is a straightforward upgrade that protects everything downstream. Either way, a licensed contractor puts a gauge on the line, and you get a clear read and your options in plain English. If nobody has ever checked your pressure, it starts with a phone call.
