[cavediver]

Originally Posted by JRTJH

I'm no plumber, so someone jump in here if I don't explain this correctly. "Satisfactory shower head performance" depends on two factors. First is pressure. Typically any pressure greater than about 35 or 40 PSI is suitable. The second, and just as important, maybe even more important is volume. If you don't have sufficient volume of water flowing through the pipes, it will just trickle out of the shower head no matter if the pressure is 40 or 80 PSI.

Now, most "non-adjustable" tube type (CHEAP) pressure regulators, the $5 plastic ones and the $10 brass ones, usually restrict water flow so much that the volume of water flowing into the trailer is less than 3 or 4 GPM. That sounds sufficient, but when flowing through a 25' half in hose, into the city water connector, through several valves, fittings, being split so half goes to the cold water side and the other half goes to the hot water side and is further restricted by the valves there, it doesn't take much volume reduction to make an otherwise suitable shower turn into a "dribbler".....

I'd suggest getting a good, high volume pressure regulator, one that flows 6 or 8 gallons per minute and adjust it to 40 PSI. You'll likely see a much improved shower experience with a quality shower head. Oh, and don't think that Keystone installs quality shower heads in most of their trailers. A trip to an RV store for an Oxygenics head will almost always bring a smile in the shower.

Think of it this way. Aupply 400 PSI of water pressure through a "pinhole" at the faucet, connect a 25' hose and all you'll get out the other end is a dribble. Now, increase that pinhole to a 1/2" hole and you'll get enough pressure at the other end of the hose to knock the decals off your trailer..... It takes both pressure AND volume to be "workable" for most open ended water functions such as a shower head.

You are correct. I think Volume is more important, it works like electricity volts =pressure amps = volume. I've run into lots of people that want an air compressor that pumps 165 psi or higher. I have a compressor that will pump 275 psi, it will fill a tire in three days. You need volume. There are lots of restrictions in your trailers water system. The lines from the pec tubing to your shower might be 3/8" or smaller and that could be the problem. Plus many 90s it all adds up to pressure and volume loss.

Jack