I bought the metal regulator sold through Camping World without the gauge but went back and bought 2 of the gauges. I'm a gadget freak so I put one in front of the regulator to see what the park pressure is and one on the other end to tell me what the regulator is doing. They have a regulator with a built-in gauge and another one that is adjustable. I think they are made by Marshall. Don't trust the regulator that is built into the trailer plumbing. It can go bad and that is why it is best to have one attached to the park faucet then attach your hose. It not only protects your trailer plumbing but also your hose from excessive pressure.
'01 2500hd ext. cab, 8.1 litre gas, 5 sp. Allison auto
3.73 rear end
Mag-Hytec rear diff cover
Amsoil Dual by-pass oil filtration system
Amsoil synthetics all around
265 watt AM Solar, Inc. system