We never leave town without a brass regulator. There is always a spare in the storage area. If you are in an area with really bad water they will sometimes get a build up and you will loose a lot of pressure. I am glad this topic came up because I need to get a couple for our smaller summertime camper.
2011 Eagle 330RLTS with just about every option.
Dodge SRW 1 ton Cummins powered.
I was born with nothing and I still have most of it left.