Arcamper wrote:
I ask that same question and then did a little testing of my own. I put a gauge on the camper side of the regulator shown. I had 70 psi going in and 38 psi coming out. Good, until I turned on the sink. It dropped to 28 coming out. Then turned on the bathroom sink and it dropped to 18. Turned on the shower and it dropped to maybe 5 and was not enough water to do anything with. This is probably why so many think it's just a restrictor. So I bought the Watts adjustable, set it to 40 and did the same test. With 70 on the faucet the camper pressure never dropped below 35 with 3 faucets on and all had useable flow. That was enough for me to justify the cost. Mine is 10 years old and has never been rebuilt and works flawless.
Good test, thanks.
I found that the output quantity varies greatly with the input pressure. Higher input doesn't always increase output quantity, under some conditions I wasn't able to get enough flow from my shower. Moved on to a real regulator.