City Water Valve Assmbly Question

[sladew]

Folks,

I have a plumbing question to ask…. I have a 1978 31’ International LY.
I am in the midst of replacing some failed water valves in the back of my coach that allow once to drain the freshwater tank. I noticed that there are a series of valves coming in from the city water connection. They appear to be first a water pressure reducer, a water pressure regulator (big cast bonze valve) followed up by a pop valve. All of my friends that have non-airstream trailers have none of this functionality. Their trailers simply have the water pressure reducer built into the city water hookup on their trailer.

When I am hooked up to city water, I attach a pressure reducer to the city water hookup and then attach my hose to it so that I reduce the amount of pressure on my hose connecting my coach with the city water hookup and the coach itself. If I were to install the pressure reducer and the pop valve in the system, is there really a need for all of the other components included in the “stock” airstream configuration from 1978? It seems that it adds quite a bit of complexity to the system. Again, I am thinking of replacing all of this hardware with a pressure reducer and a pop valve that will dump the water onto the ground if it exceeds a given pressure. Would this be a mistake? What functionality would I be leaving out? Should I reinstall all of the old hardware? What purpose does it serve?

Thanks,

Slade Weaver