: I live in a mobile home park where water pressure sometimes exceeds 100 psi. I've been told I need to install a pressure reducing valve to protect the plumbing in the home. The home installation guide that came with my home said water pressure should not exceed 80 psi.

: The house is connected from the water meter to a main cut-off under the house by what looks like a 1" black plastic flexible pipe.

: My question is, if I do this myself, should the pressure reducing valve be after the main cut-off or before it and if it should be before it, can I just cut the plastic pipe and clamp it in the gap I made for the cut?

: Thanks,
: Tom

Tom,
I would put the prv after the main shutoff.
Terry