Water pressure

[Trooper25D]

When using city water, how can equal water pressure be acheived throughout the trailer? The tub faucet (closest) and the kitchen faucet (furthest) seem the have the least amount of pressure/water flow. The br faucet (right next to tub) seems to have the best pressure/highest flow. Note; I'm not running all at same time. All faucets could be off and the kitchen faucet is a little more than a dribble. I just replaced the cheap RV faucet with a mid quality home faucet (Price Pfister) with no improvement. Flow may even be less than before, although the sprayer has good flow through it. I've thought about a clogged line, but that has been ruled out. The br plumbing is apprx. 7' from city inlet; kitchen is 14' - 16' away. (not very far at 45# of pressure)
Help! You're input is always appreciated.
Thanks,
David

[Trooper25D]

When using city water, how can equal water pressure be acheived throughout the trailer? The tub faucet (closest) and the kitchen faucet (furthest) seem the have the least amount of pressure/water flow. The br faucet (right next to tub) seems to have the best pressure/highest flow. Note; I'm not running all at same time. All faucets could be off and the kitchen faucet is a little more than a dribble. I just replaced the cheap RV faucet with a mid quality home faucet (Price Pfister) with no improvement. Flow may even be less than before, although the sprayer has good flow through it. I've thought about a clogged line, but that has been ruled out. The br plumbing is apprx. 7' from city inlet; kitchen is 14' - 16' away. (not very far at 45# of pressure)
Help! You're input is always appreciated.
Thanks,
David

[Gary RVRoamer]

David specified using city water, so the pump doesn't enter into it (though he could still use it if desired).

Your problem is almost certainly flow rather than pressure. Pressure will equalize in any system (the laws of physics), though in practice there can be some variation due to local turbulence.

How did you rule out a clogged or constricted line? Does the water flow well when the line is disconnected from the faucet? Run it into a bucket and measure the gallons per minute, then do the same running it through the faucet.

Rv plumbing is medicore at best. The lines are undersized (relative to standard house plumping) and the distribution system is often poor. It might be possible to run a new 0.5 inch water line from near the city inlet to the galley and tub area sto feed the faucets there. That would likely fix the problem.

[jrcnlc]

Are you using pressure regulator if so what kind.Is it both hot an cold or just hot.

[Ray,IN]

Small diameter(3.8"ID) water lines and water pressure regulated, spell low flow. RV pressure regulaters themselves greaty reduce the volume as well as the pressure. Add this up and you have a normal condition for many RV's. Read up on water flow rates (internet search) through the different size pipes and you'll soon reach this conclusion yourself.

[Retired and Happy]

Please give a comparison between running city water and running your pump with city water disconnected or shut off. Same symptoms for the same fixtures?

[Steady Eddie]

"I just replaced the cheap RV faucet with a mid quality home faucet (Price Pfister) with no improvement. Flow may even be less than before, although the sprayer has good has flow through it."

David---
Is the new faucet a "water-saver" model?
The bubbler thing in the very outlet could
be the bad guy, for that faucet.
Try a 5/8" supply hose instead of a 1/2" hose.
There is sometimes a screened inlet filter in the inlet hose fitting and (depending on brand)
there could be another one on the intake side
of the water heater. One or both of these filters could be plugged.

[Bob (WA0MQE)]

You didn't mention whether you use a regulator at the city water connection. This is highly recommended of course, because one never knows what the pressure is. I recently replaced the inexpensive standard regulator with a higher quality adjustable one that also has a pressure gauge. Providing the pressure is high enough at the city water connection I can now adjust the pressure up to the max of the city supply pressure. This makes a big difference on the pressure at the faucet's inside the rv.

[Steady Eddie]

Yes, there are some very good "whole house"
water pressure (adjustable) regs out there.
We have camped in campgrounds where the
water pressure at the hose bib was over 100 PSI.

This is what DW calls "old man stuff"--I try to
always shut off the water supply before bedtime,
and if we leave the campground. I do it when walking the dog lastly at night and turn it back
on when walking the dog in the morning.
We've suffered through two Pex tubing fitting failures--not pretty--and the Newmar is rated for 60 PSI-input water pressure--but I will not
take the chance and have a pressure regulator
(a CW brass cheapy) at the hose bib, and live
with it.