Originally Posted by vandersr
I’m not a mechanical guy. There’s not much I can check. Would removing the pressure gauge help push through any debris?
What do you mean by “pressure gauge”? Do you have a pressure reducing valve with a gauge connected to your hose? If so, that could be the problem. There are so many versions of these and many of the cheaper types will restrict the flow a lot — especially if they have collected a little bit of debris in them. Even though the pressure gauge reads 40psi, that has nothing to do with flow restriction. If the pressure reducing valve is restricting flow, it will still read the correct psi, but you will see a very noticeable drop on your pressure gauge when you turn a faucet on in the RV. Take the pressure reducing valve off of the hose and see if anything changes. If you’re afraid to do that, watch the gauge as somebody turns a faucet on inside. If the pressure on the gauge drops more than 10psi, your problem is at or before your pressure reducing valve. If it doesn’t drop that much, the restriction is somewhere after the pressure reducing valve.