Gipsyking
New Member
Hi Everyone,
We recently had a new Rinnai tankless water heater installed with a recirculation line which has a couple of check valves (see photo). The tankless water heater works very well. For some reason though, our sprinkler system has been creating a lot of loud banging noises in the pipes around the water heater every time the sprinkler system comes on or changes zone. Not sure if this is water hammer or some other issue. We have already replaced all the sprinkler zone valves to new valves which are soft open and close and that did not solve the issue, although it did reduce the intensity of the banging a bit.
For now we have shut the sprinkler system off. Really appreciate any leads here on how to troubleshoot the issue. We never had this issue with our old hot water heater which was a regular 'ol tank without a recirculation line. I also want to avoid paying $2k which is the cost quoted to install a separate water meter for the sprinkler system so it doesn't touch our mainline going into the house at all.
Thank you so much.
We recently had a new Rinnai tankless water heater installed with a recirculation line which has a couple of check valves (see photo). The tankless water heater works very well. For some reason though, our sprinkler system has been creating a lot of loud banging noises in the pipes around the water heater every time the sprinkler system comes on or changes zone. Not sure if this is water hammer or some other issue. We have already replaced all the sprinkler zone valves to new valves which are soft open and close and that did not solve the issue, although it did reduce the intensity of the banging a bit.
For now we have shut the sprinkler system off. Really appreciate any leads here on how to troubleshoot the issue. We never had this issue with our old hot water heater which was a regular 'ol tank without a recirculation line. I also want to avoid paying $2k which is the cost quoted to install a separate water meter for the sprinkler system so it doesn't touch our mainline going into the house at all.
Thank you so much.