Water pressure regulator
I just purchased a 2012 class a motorhome and was wondering if a 40 psi water regulator is required as in a travel trailer.
Forum Discussion
teddyu wrote:All58Parks wrote:teddyu wrote:
Does anyone realize that a typical RV pressure regulator only works when there is flow through the line. At a static head (no flow) the RV pressure downstream of the regulator goes to the service line pressure until flow is established, then the pressure is reduced. I do not use one. My system is designed for the typical CG water pressure. When I check-in I always ask how their water pressure is. If they say high, I fill my tank and use the pump. JM2¢...
Not quite accurate. A functioning PRV (Pressure Reducing Valve) will hold the maximum setting even with no flow. A valve with a dirty or worn valve seat will perform as you say. I use these all the time in my line of work, and have tested and serviced many over the years.
I believe there is a distinction between the inline RV pressure regulating valves and the pressure reducing valve you described. The external spring in the PRV regulates the diaphram openning to maintain a set pressure. The internal spring of the typical RV pressure regulator acts more like an excess flow check valve than a pressure reducing valve. Big difference in functionality and cost. JM2¢...
Teddy, If what your saying is that the pressure will equalize through a typical RV regulator when there is no flow, that is wrong.
My apologies if I'm misinterpreting you.
60 PSI without regulator:
45 PSI with regulator:
