rinnai tankless

I have a client who got convinced to install a tankless water heater (Rinnai RL75iN) instead of a boiler. Now he has called me. The system isn’t quite keeping up set at 140, and he can’t afford to install a boiler at the moment. I’m trying to help him out. Does anyone know how to get that Rinnai...

I've had issues with two different Rinnai tankless water heaters leaking from the heat exchangers over the past several years. I'm now on my second Rinnai tankless water (an RL94i) within the period of only 9 years. The first unit, which was installed when the home was built, started leaking...

Hello, We have had a mysterious problem for the last two months at our house. There has been a persistent flow of some sort of sediment that is clogging everything on the hot water side. Our setup: City water --> softener --> tankless heater We also have a recirculation loop with a small 6...

Hello, Amateur plumber here. I installed a Rinnai tankless water heater a couple months ago and it’s awesome. The only problem that I can figure out is that when we use the shower or washing machine(both pull a lot of hot water), the water heater has a massive, loud, house shaking vibration for...

Hi, My question is, is there way to have both a dedicated hot water loop AND use a thermal bypass valve? I'll explain: My not-so-great contractor built my brand new house with a dedicated hot water return loop (on a Rinnai RUR) that only covers one area of the home. Then the hot water...

Hi I have a Rinnai tankless water heater all of a sudden when filling the the tub the flow has dropped way down and and it it’s not as hot as it should be. When I pull up the codes in the control r app it’s all zeros. I replaced the Water Flow Servo & Sensor gas pressure is where it should be...

Help! The plumbers installed our outdoor tankless Rinnai between two batons(board and baton) on the side of our house near our master. We can hear the tankless, and the one inch gap between the back of the heater and the house seems to cause an echo effect. Is there anything I can use to...