Dielectricunion
New Member
I installed an Rinnai gas tankless for a friend of mine last year. He said when they turn on the shower every morning, it lets out a loud deep rumble from the exhaust (PVC). He described it as sounding like a didgeridoo. I did not check the gas pressure when I installed it but it is hard piped in 3/4" and not far from the gas meter. I can't recall the exact model number but I think it was a 8-ish GPM. Apparently, everything else is working as it should.
Any idea what would cause this?
Any idea what would cause this?
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