mdk0420
Well-Known Member
Hello all. An issue arised after getting my combi boiler fully operational. Whenever the washers are running I they cause a dramatic water hammer effect while they fill up. I'm guessing this is caused when they open and close the valves to fill it with the right temp water. When I say dramatic, I mean the pipe shakes like crazy and my relief valve and backflow preventer start spitting. I have a pressure reducer set to 60 psi. Never had this issue until I ran the hot water through the tankless water heater and got rid of the 50 gal tank heater I used to have. There wasn't any expansion tanks even on the hot water heater, but maybe the volume helped distribute it. There doesn't seem to be anything specific about needing an expansion tank on a tankless water heater however I'm thinking of putting one on it to see if it'll help the issue. Im not getting one off those stupid arrester canisters. They tend to fail over the course of just a couple of months. I want a relatively maintenance free solution.
Do you think the expansion tank will mitigate or solve the issue? Or won't it make any difference?
I can't repeat this issue through the shower or other regular faucets no matter what combination of smacking faucets closed.
This happens to both washers (mine and my tenants, they feed off a separate hot water heater that's also not protected by an expansion tank).
The specific area that gets hit and starts shaking is right at the pressure reducer which is near the entrance of the main to the house.
Any other suggestions? Again looking for mostly maintenance free solution. It looked bad enough that if I wasn't here it would've probably started damaging things. All the pipes are really secured except for the piping that first comes into the house.
Do you think the expansion tank will mitigate or solve the issue? Or won't it make any difference?
I can't repeat this issue through the shower or other regular faucets no matter what combination of smacking faucets closed.
This happens to both washers (mine and my tenants, they feed off a separate hot water heater that's also not protected by an expansion tank).
The specific area that gets hit and starts shaking is right at the pressure reducer which is near the entrance of the main to the house.
Any other suggestions? Again looking for mostly maintenance free solution. It looked bad enough that if I wasn't here it would've probably started damaging things. All the pipes are really secured except for the piping that first comes into the house.