Vibrating Pipe at Rinnai Intake

Users who are viewing this thread


New Member
Reaction score

I live in an 11-year old house in MA, and over the past week the cold water intake to our Rinnai tankless heater has been vibrating on and off. Sometimes when we're using hot water - dishwasher or laundry - but also other times when everyone's in bed and nothing's running, hot or cold.

I flushed the unit because it was almost due for it anyway but it didn't address the issue. When the pipes start vibrating, closing the laundry room valve if the machine's not running can help to tamp it down. Last night the vibrations made their way up to the primary bedroom toilet and I had to close that off to stop the noise.

We do not have an expansion tank, and we haven't done any work on the house that would have impacted things. Any advice on how to address this would be greatly appreciate - thank you!

NOTE: Video won't upload, so here's a link.
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.

If any particular ad is your REASON for blocking ads, please let us know. We might be able to do something about it. Thanks.
I've Disabled AdBlock    No Thanks