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Old 07-24-2010, 06:00 PM   #1
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Water gusher

Well, we were at Lake Powell for the last two weeks, as we have been doing every year but two since 1976. Always a great time, but the last day we had a disaster. On my coach there is about a 15 inch section of high pressure, flexible hose from the water pump to the the rest of the water system, which is PEX tubing. Last year I had a little leak develop, due to this hose having a twist in it near the PEX coupling. WRV had used PEX couplings and adapted it for use with the short section of flexible hose. I just replaced the hose. Bad decision. Well, the darn hose sprung a leak about two inches from the pump and emptied the water tank! Luckily? it was only about 20 or so gallons. What a mess! When I got home I emptied out the bay and let it dry for a day or so. Luckily I live in the desert and it is hot right now and no humidy. Anyway, I said why the heck not replace that stupid hose with PEX. Well, it was an easy job and should not have a leak issue. I would recommend doing this if your coach was so built.

To get to to fittings, I had to pull my dump hose container. I then disconnected the PEX fitting closest to the outside and pulled that one section out. I then made up a section of PEX hose at the end which would point to the water pump. You are now dealing with a two piece section, 90 degrees apart. To get a straight shot at the pump, I used my die grinder to remove some metal from the hole in the wall separating the storage area from the water connection area. This hole has power and vent hosing. This should have no stress on any joints and I hope last forever.

2001 34' Alpine Coach
2008 Jeep Rubicon or 2012 Ford F150 4x4 Lariat towds
or a couple of different trailers
Retired in Apple Valley, California
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Old 07-24-2010, 06:25 PM   #2
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I am not familiar (yet) with PEX so my qustion would be did they originally use the 15 inch flexible to hose absorb the pump vibration?

Bob, Sandi & Marmaduke the Big Pug
SW OREGON 2004 Journey 39K, 330 Cat
If towing: a 2006 Mini Cooper or 2015 RAM Limited 4X4
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Old 07-25-2010, 08:07 AM   #3
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Std 1/2" faucet hose connections from Home Depots [or Lowes] work pretty well as a replacement/isolation upgrade. Go with the metal braid if you want max pressure protection and a nice look [smile].
Old Scout
2003 40' MDTS
Garden Ridge, Texas
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Old 07-25-2010, 08:47 AM   #4
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If you now have PEX going directly to the pump you may be unhappy in the long run. Usually a short piece of flexible line is run from the pump to reduce the noise of the pump from being reflected throughout the entire coach plumbing. Our coach originally had hard connections everywhere and we replaced the first section from the pump to the tubing with a braided water hose and added a loop to absorb the noise and vibration. The difference was quite noticeable.
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Old 07-26-2010, 12:18 AM   #5
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Location: Long Beach, CA
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I went from all PEX to a flexible line from Shurflo, designed to cut noise. It was the same thing Home Depot has but cost me about 50% more. Oh well. It works.

It isolates both the incoming and outgoing water lines at the pump. They are 18" lines each and are both looped.
2003 Alpine 40FDTS (400HP)
Long Beach, CA
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