I use a 40 psi reg when I hook up to city water. The pressure is always low to take a good shower.When I use the water pump in the RV It is a lot better. My question is if I am using the RV pump and h...
If you really want to use a pressure regulator than get an adjustable one. Crank the pressure up to where it matches the output of the pump, your plumbing can obviously handle more than 40 psi. I've used a 40 psi regulator, actually more than 1 now in the trash. Put it on, seems okay and in very short time seems like the pressure has dropped in half.