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Old 01-20-2016, 09:28 AM   #1
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Hidden Shower leak

Hello- Just joined this forum and just bought my first used RV ! My question is I bought a used Four Winds Hurricane 31H Class A Motorhome and Everything seemed fine as I inspected it very carefully before purchase. But I noticed the floor in front of the Shower seemed to have a soft spot but very little area and figured it might be just from floor getting wet when people getting out of shower. However, I also noticed after taking a shower couple of time the floor inside the shower in front of the Drain seemed to be not as solid as the rest of the plastic floor in the shower. I could not see any signs of a leak from inside the coach at all. No water spots or wetness anywhere. My final clue that I think I have an issue is I noticed a small Bubble/Delamination on the outside on the fiberglass right where the Shower floor is. Again no signs of water leak anywhere. But as I am just fulltiming by myself and my Dog I have not had anybody take a look under the coach while the shower is actually being used.
Any suggestions where the leak may be at? Thinking it has to be under the shower somewhere. How can this be fixed ?

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Old 01-20-2016, 02:41 PM   #2
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One place to look is the pipe from the control valve to the shower head, this could have come loose/cracked and would only leak while you are trying to use the shower. You might be able to take the small cover off the control valve and see if you can see a leak.

The next place is the drain, there could be a leak either at the drain itself or the P trap. There is normally an inspection/access cover to look under the shower pan, if not there would be access from the basement.

Jim J
2002 Monaco Windsor 38 PKD
2005 Jeep Grand Cherokee w/5.7 Hemi
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Old 01-20-2016, 08:31 PM   #3
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If your pressurized plumbing is leaking you can accurately determine this by shutting off all faucets, turning on the water pump and listening for it to briefly turn on and back off during the time of one hour. If it does that, you have a water line leak or pump leak. if is does not you have a waste water plumbing leak.
Waste water plumbing leaks, if you can access that specific area, are easy to fix with one of the as-seen-on-TV leak stopping sprays or something like Dicor sealing tape.
Pressurized lines must be repaired by cutting out the bad sectionj and inserting a straight connector or replacing the line.
Repairing the floor is another story.
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"
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Old 01-21-2016, 12:00 AM   #4
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Location: Roseville, CA
Posts: 97
Agree with Jim J.

Had similar problem with my used RV, 1st trip. Small water leak on floor front of shower. Leak was from shower control valve assy (plastic) cracked at valve, leaking down wall. Replaced control valve assy. Fortunately, no water damage. Had access panel in hallway to shower valve. Good luck!
Larry & Sue
2005 Georgie Boy Pursuit 3180DS, 31'5" Class A, 18K GVWR, 208", F53/V10, CHF, TST 507, FMCA, GoodSam
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leak, shower

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