Originally Posted by Ramzfan
Do you have to go through that whole routine every time you move or hook up?
No! Assuming a normal range of inlet pressures and a quality regulator of adequate flow capacity, it is pretty much a set once and forget exercise. Loosen the locknut, set the pressure and tighten the locknut. Over years the spring inside does tend to weaken a tad, but that is a very long term effect.
One thing I would suggest is fitting one of those conical wire strainers at the supply side of the regulator to prevent any pipeline scale or sludge messing things up but that is good practice anyway.
Only needs checking the pressure once in a blue moon, but of course if the regulator has a gauge on it, you can easy see if the system is OK every time you turn on the faucet at set up.
Reason I suggest setting it with a small flow is that most control systems are happier if they are not in a fully shut down mode so you will get a more accurate and more meaningful setting if the system is actually controlling at the time.
As for suggested pressure - Big advantage of a Watts unit is you get to have a choice. If 20psi gives you enough flow through the shower, then why go higher. Water heaters certainly don't enjoy 60psi. Save the planet one drop at a time.
The main limitation will be if you have a very fine undersink filter that really does need 45psi to get a decent flow through it once it starts to block up a bit.