We returned to install delta single handle shower cartridge in the master bathroom on the left hand side as you're facing of the shower. Turn to the water off to the house after taking a pressure reading, which was at a hundred psi. The gold of the customer and informed them of the high pressure issue. They agreed to have the cartridge replaced without the prv. Being replaced. Turn to the water off to the house and drained partially replaced the cartridge.And set it to the maximal temperature. I then turned the water back on and turned the.Recirculation, pump back on and allowed all of the air to prime out of the lines. Checked, to make sure that all the fixtures we're running properly. thank you for choosing and trusting t e with your plumbing needs