We installed a water heater and we attached the nipples using sealing tape. The nipples leak where attached to the heater. The threads are clean and even on the nipples and feel the same on the inside of the water heater. What could be causing them to leak?

There is problem with our hot water system, not getting hot water while as cold water is OK. Starting hot water there is lot of explosion sort of sounds from water cylinder and hot water will start dribbling and stops after some time.

I just bought a water heater and completely installed it. When I turned on the water supply, a very very very slow drip can be observed where the cold water nipple screws into the water heater. I shut off the water, relieved the pressure and unscrewed the nipple. I then re-apply the teflon tape...

I need to know basic water heater tank maintenance

What I have is this. An oil fired boiler that generates hot water for my house baseboard heating system. Contained within the boiler is a tankless heater that is heated by way of the firebox in the boiler. The tankless heater is used only for domestic hot water. It has a separate CW supply to the...