Quote:
Originally Posted by paulwadley
The tankless hot water systems needs between 50-55 psi water pressure to work properly. When I hook up to city water, I use an adjustable water pressure valve set set to 55 psi and have the temp set to 106. I then turn on the hot water only. Works great at that point.
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The adjustable regulator will not increase low pressures they only reduce higher pressures to the set pressure. If the spigot only has 45psi you'll only have 45psi in the RV regardless what the regulator is set at.
Id think that if the RV is equipped with a water heater that needs 50-55 psi they would put in a pump that puts out that much, but it is a RV so ANYTHING is possible.
Also tankless water heaters doesn't mean instant hot water. RVs typically have long runs of small diameter uninsulated piping so it takes a bit for the hot water to reach a faucet.