tankless heater

For background, this is on a house overseas, where I have no access to licensed professional plumbing services. I'm on my own with this one. The house is 4500 s.f. with 4 bathrooms. It originally had 2 tank heaters hooked into the same hot water lines, spaced at opposite ends of the house. When...

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...

I hired a plumber to install a Navien 240a2. When I run the hot water in one my showers or faucets and then inspect the unit, the line labled "HOT" feels cold and the line labeled "COLD" feels hot to the touch. The red valve is connected to a terminal that is labeled HOT The showers and...

Hey all, Do you think I descale the entire hot water system - tankless heater and pipes - by running CLR solution or Vinegar through it using the circulatory pump? In this configuration the circulatory pump would suck CLR solution through all the pipes and the heater from a bucket on the...

Hello from Oil City Pa. I have a small dilemma. I have purchased a Rheem RCBH199DVLN natural gas tankless hot water heater. I am wanting to plumb it in-line with my out door wood boiler to my air handler. I am wondering if I need an expansion tank? I do not know my house PSI as it is a natural...

A few years ago, we replaced our conventional water heater with a tankless system. Because the water quality where we live is very poor, we also had a Falsken Water Systems filter kit (“The Heater Treater”) installed at the same time. The unit is connected to the feed water line and basically...