Up graded fresh water pump

[Pete Masterson]

Don't take my comments as a negative on PEX ... I think it's a great
product, especially in an RV. Most of the time you can run (with
bends, etc.) with a single piece of material and not require any
intermediate fittings (the major source of potential leaks). The
stuff is designed to be 'bent' in the 14" or so space between studs
in a home so you don't need an angle fitting. The technique requires
making a loop in the "wrong" direction so that there's slack for
thermal expansion. This looping proved to be difficult with the 3/4
inch PEX in the rather limited confines of the area I had available
(about 10" on either side of the pump) in the coach compartment. It
helped to heat the PEX tubing (in a laundry tub with hot water)
before making the bends. And, like I said, the 1/2 inch material
(probably sufficient for service to your sinks) would be much easier
to bend.

I also highly recommend PEX Connection for the fittings needed. Their
fittings are all compression-type and require no clincher or other
hard to master tool. Just press together and tighten up the ends.
Really very clever.

Pete Masterson
aeonix1@...
'95 Blue Bird Wanderlodge WBDA 42'
El Sobrante, CA




On Feb 26, 2007, at 12:53 PM, Terry Neal wrote:

> Thanks Pete for an excellent report of your pump replacement. I am
> glad
> to hear the PEX comments too. I may wind up replacing all of my
> copper
> pipes with PEX but now I know what to expect if just using the PEX to
> make the hook up to the system. I have only one pump in my system & I
> do want to take out the accumulator tank in any event. I do get real
> hot water quickly at the bath sink & the shower now. Maybe 5-8
> seconds
> delay at the most. I have noticed higher water pressure on the Hot
> side
> vs the Cold side though. Suspect I have some valves that need
> cleaning/replacement.
>
> Terry Neal
> Bozeman, MT
> 82PT40 6V92TA
> 74FC34 6V53T
>
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