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Old 05-04-2014, 09:06 PM   #1
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Pex plumbing in RV's

The plumbing in our new trailer has pex with the cinch clamps. The pex appears to be somewhat different than household pex in size...not certain but perhaps 3/8" as opposed to 1/2"??? I removed the onboard water filter after reading all the horror stories in here and was anxious to test my new connection that I made using Sea Tech compression fittings...all is 100% with my connection but in testing I noticed a very slow drip from one of the cinch clamps at a Tee that FR had installed. So, I want to redo that cinch clamp, but big box stores just carry 1/2" and 3/4" cinch clamps. If in fact the pex that FR uses is a tad smaller and is 3/8", will using the 1/2" clamp from big box store still do the trick? It appears to me that FR set the clamp a bit further back from the end of the hose attached to the tee than normal, so perhaps the clamp isn't biting enough.


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Old 05-04-2014, 10:34 PM   #2
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When I removed the water filter on my V-Lite I used 1/2”. I used the copper crimps because I had the crimp tool, not the cinch tool. Regardless, it was 1/2”. The ring should be 1/8” max from the root of the “T”, it has to clamp down on the barbs to work correctly. I hope this helps, good luck!

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Old 05-04-2014, 10:36 PM   #3
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Home Depot sells a great product called Shark Bite. This is what I have used in the past for pex and it has worked great.
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Old 05-05-2014, 07:08 AM   #4
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X2 on the shark bite fittings i carry an assortment of them and a 5 foot 1/2" section of pex pipe just incase of a leak
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Old 05-05-2014, 08:05 AM   #5
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Originally Posted by spierce617 View Post
Home Depot sells a great product called Shark Bite. This is what I have used in the past for pex and it has worked great.

I wanted to put Shark Bite shut off valves in my camper on certain lines. I bought the valves and took my camper to a RV service center and asked them to install them. The Tech said he would not do it if paid to and not even guaranty any water lines that had the Shark Bite fixtures on an RV. He said that the possibility of the Pex lines and Shark Bite fixtures freezing and thawing and flexing would at some time down the road start to leak. He said that the Shark Bite works fine in a house where the temps are stable and there is no movement and vibration, but that he or his RV center would not mess with them on any RV.
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Old 05-05-2014, 08:20 AM   #6
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As I mentioned in the original leak is at a Tee that FR installed...all I want to do is re-clamp the leaking tube going into the tee. If I was to use shark bite that would mean redoing the tee and the other lines going into it...seems unnecessary when a simple new clamp on the leaking one will do.

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