Originally Posted by
Gary Swart
This is a bit behind the OP, but I'll toss it in FWIW. The problem may not be too much pressure, but every homeowner should know what the pressure is in the home. Too much is damaging to not only the toilet, but dishwasher and clothes washer that have valves that are constantly under pressure. They are not designed to last under high pressure. Your other faucets may withstand the added pressure OK, but pressure over 60 psi is really unnecessary and over 80 psi is really excessive. Pressure gauges are available at almost any hardware store for just a few dollars. If the pressure is over 80 psi, you are really pushing the envelope and a pressure regulator and thermal expansion tank should be added and the pressure adjust to a safe level. Toilet supply valves should always be full on. Shutting a valve partly does not reduce pressure, only flow.