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Old 09-01-2016, 04:03 AM   #1
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PEX Type piping heads-up

W have a 2009 Coachman Freelander 27RS through this would apply to anyone.

The wife wanted a one handled faucet assembly on the double kitchen sinks for various reasons. This is something I considered I could do myself with the main problem being access. I did the minimum of disassembly of cabinet to do the job and disturbed anything else as little as possible. Upon testing out the new assembly clamped pipe joints that I didn't even come close to were leaking. I reckon I must have torqued them in some part of the process. To get to some of these to reclamp would have required disassembly of sink and removal of the water heater. I think I solved the problem by installing additional worm drive clamps next to the crimped units. --Boy were those spaces tight and I have the cuts to prove it!

Take away-- If you attempt to make plumbing changes on these units be sure to check with pressure before closing stuff back up --I would have never seen these leaks until the floor rotted.
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Old 09-01-2016, 05:15 AM   #2
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Not sure why your fittings would leak after working around them.
Couple of questions. What type of fittings were used? Plastic or brass? What type of crimp were used? Solid copper or pinch type?
I have replaced the faucets on both sinks and with no leaks. Original fittings were plastic with pinch crimps.
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Old 09-02-2016, 03:45 AM   #3
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They were plastic fittings with metal pinch clamps. Like you I don't know why they would have leaked. I would have attempted to recrimp the clamps but couldn't get a tool anywhere close to a couple.
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Old 09-02-2016, 05:19 AM   #4
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Thanks for reminder about checking for leaks before calling the job complete.
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Old 09-02-2016, 05:40 AM   #5
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Are you using a pressure regulator on your water source? City water pressure can have surges or high water pressure which is to high for motor home.
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Old 09-02-2016, 02:07 PM   #6
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I just replaced my kitchen facet with a nice high goose neck type.
I used a Pex angle stop for the conversion to the 3/8" screw on fitting from facet.
It just pushes on the pex and adds shut off valve under the sink.
Home depot:
SharkBite 1/2 in. Chrome-Plated Brass Push-to-Connect x 3/8 in. O.D. Compression Quarter-Turn Angle Stop Valve-23036-0000LF - The Home Depot

The easy way.
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Old 09-02-2016, 02:38 PM   #7
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Quote:
Originally Posted by Dutchstar08 View Post
I just replaced my kitchen facet with a nice high goose neck type.
I used a Pex angle stop for the conversion to the 3/8" screw on fitting from facet.
It just pushes on the pex and adds shut off valve under the sink.
Home depot:
SharkBite 1/2 in. Chrome-Plated Brass Push-to-Connect x 3/8 in. O.D. Compression Quarter-Turn Angle Stop Valve-23036-0000LF - The Home Depot

The easy way.

X2. Same here. I added the sharkbite shutoff valves when I changed out the kitchen and bath faucets. Also added a similar valve to the toilet supply so I could turn it off if need be.
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Old 09-03-2016, 05:32 PM   #8
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FWIW: Prior MH, 2000 GeorgieBOy Landau, the plastic fittings for the PEX tubing began to fail at about 8-10 years. The plastic became brittle and would crack/leak if the tubing was moved. I replaced all the plastic fittings with brass and used the SS Clamps, not the compression rings. Clamps and tool available at Home Depot. I was able to access all the fittings.
Info on the plastic fittings stated that they become brittle when used with Chlorine. (RV water lines??? )
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Old 09-04-2016, 04:13 AM   #9
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Thanks for all comments.

I use a pressure regulator all the time but I have no idea about the PO. I do know that I had no leaks until I disturbed the piping.

I pulled one of the vertical stubs somewhat sideways to insert the new fitting. This is what I called torquing. It must have broken the original tension seal or water deposit seal that had formed. To me it couldn't have been crimped to the correct spec. These were the multiple wrap crimp clamps.

My problem is that I have lost faith is all the connections and there are lots that you can't see or get to without massive disassembly. Just one more thing to check and be aware of.
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Old 09-04-2016, 05:17 AM   #10
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Quote:
Originally Posted by Dutchstar08 View Post
I just replaced my kitchen facet with a nice high goose neck type.
I used a Pex angle stop for the conversion to the 3/8" screw on fitting from facet.
It just pushes on the pex and adds shut off valve under the sink.
Home depot:
SharkBite 1/2 in. Chrome-Plated Brass Push-to-Connect x 3/8 in. O.D. Compression Quarter-Turn Angle Stop Valve-23036-0000LF - The Home Depot

The easy way.
FYI - Lowes sells a Blue Hawk version of the Sharkbite that is plastic, so it is lighter. It is also much less expensive and includes a release feature as part of the fitting so you do not need the special release tool. I use them all the time and have had great results!
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Old 09-05-2016, 09:50 AM   #11
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Did similar myself. Found water drip from one push on shut off I installed. Tried to remove to fix but had problems. Noticed a little slop in the fitting and was able to push it in a little more. Voila!

Not using these fittings before it seems I had not push the fitting all the way in to seat properly.
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