Do I need pressure regulator for a tankless water heater?

Answer 1

If your house water pressure is not over 80 pounds, you do not need a pressure regulator for the heater. The heater pressure will be the same as the cold water pressure throughout the house. Just in case your question was not worded properly, it may need a pressure/temperature relief valve. Same as normal water heaters.

Answer 2

You dont need a pressure regulator for the heater unless your pressure is high throughout the whole house. 50lbs. to 80lbs. per sq. in. is a normal range. The tankless water heaters need shut offs, hose bibbs, and unions on each line though. A company named "Watts" makes a special piece for this called "Isolator" valves. They have all these features built into one piece per line and simplify installation greatly. They also have the threads for a temperature and pressure valve. Look into them. They are worth their weight in gold when installing tankless heaters. Also, the temperature and pressure valves required for these types of heaters are slightly diffetent than those manufactured for regular tank heaters. If you go to a plumbing supply shop, they can make sure you have the right one. They should also have access to the Isolator valves I mentioned earlier. The T & P Valves for the tankless heaters have a shorter Temperature rod than regular tank heater T & P valves do. Talk to a local plumbing supply shop and they should be able to set you up with what you need. Good luck!

Answer 3

Yes if you are on a well water supply, because with a well and pump the water pressure will fluctuate when the pump kicks in, and no if you are on municipal water supply, but note that if the pressure is too high like above 70-80psi you will need it in this instance, hopes this help.

Answer 4

No because its tankless so water doesnt sit.

Answer 5

depends if its pressurised or open vented. pressurised yes.
very important to find out