Had a plumber come out and replace a bad pressure reducing valve and install an expansion tank to the water heater. A few weeks later I started to hear a knocking/tapping sound coming from the area of the PRV.
I was able to get video of the sound coming from the area of the PRV, https://photos.app.goo.gl/8o3jvtpaQeBDtoLz7.
Had the plumber come out and he replaced the pressure reducing valve and right after he replaced it he heard the knocking sound. Plumber checked a few things around the house but he was stumped. I have no noticeable leaks in the house and when it does make that sound we are not using any water in the house (shower, laundry, dishes, etc). Is it another bad PRV or is the pressure set to high, plumber set it to 75psi.
I was able to get video of the sound coming from the area of the PRV, https://photos.app.goo.gl/8o3jvtpaQeBDtoLz7.
Had the plumber come out and he replaced the pressure reducing valve and right after he replaced it he heard the knocking sound. Plumber checked a few things around the house but he was stumped. I have no noticeable leaks in the house and when it does make that sound we are not using any water in the house (shower, laundry, dishes, etc). Is it another bad PRV or is the pressure set to high, plumber set it to 75psi.