This all started in May... one night our pipes started banging so loud it felt that our townhouse was going to burst. We tried to shut off the main water supply to our house and the noise seem to quiet down but the noise did not stop but only seemed as if the sound was below the main shut off rather than above. The next morning we called a plumber and was informed it must be our Pressure reducing valve that needed to be replaced. So we replaced it at the tune of $500. and the noise seemed as if it stopped. However, a day later we heard the noise again - not as loud but we could still hear it. We would explain the noise as if it was a clanging in the pipes. We called the plumber back and he came back to the house - checked the prv - it was ok, set the pressure to 55 psi, and checked the balls in the cold pipe leading to the water heater. Everything seemed fine. The plumber left and really did not do anything different and the noise went away. A few weeks later we started getting some rumbling in our pipes but nothing to kept us awake at night. But a few weeks later - that noise went away too.
Now on Dec. 1st. We got the awful noise in our pipes just continues banging and what could be described as water hammering. The county came out to check our meter (o yah - the put a new meter in back in May) and the meter was fine but when the guy from the county came out he checked our water pressure and he explained that he turned the water on it would register 55 psi but when he flushed a toilet it dropped to 0. He said we needed to replace our PRV.
So we called the plumber back and they replaced it for free since it was covered under warrenty. A day later we heard the noise again - called the plumbers back and yet when he came back the next day the noise stopped and we didn't hear it for a while.
Now about two weeks later we hear what we would describe as a roaring in our pipes. We read something about flushing out our water heater - so we did. The noise kept on going. Now we get the roaring (the plumber actually heard the noise for the first time last week and he described it as blowing in the pipes) followed by clanging. We hear the noise a lot at night but we also hear it throughout the day. We have replaced all of our toilets with flowmasters.
The plumber was here last week and put a gage on our water heater as we were talking the psi raised to 90 and then the noise started. He quickly turned the valve off to the cold water side of the water heater but the noise kept going. He turned the main shut off valve off (we have the old fashion I think called gate and not a lever) and yet the noise continued for a little bit.
O yah - I forgot to mention that at times the cold water pipe on the water heater will get burning hot even up before the valve.
We are at the point of putting on an expansion tank on the water heater - and replacing the gate valve with a lever. We really don't know what else the problem could be that is causing this noise in our pipes.
Please help us figure this out. Again - the noise can happen at any point of the day not necessarily related to water running.
We have caught a little bit of the noise on youtube however at times the noise can get louder and with more banging