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Old 10-11-2012, 06:13 PM   #1
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Replacing Kitchen Faucet

I have a 2001 Alpine Coach. Bought a Moen faucet to replace the kitchen faucet. Had it all ready to connect the water and ran into a problem. The old faucet has copper tubing connecting to plastic tubing with plastic fittings.
The new fittings do not match up to the plastic tubing. Any clues? Any advise would be greatly appreciated.

Al and Barb Johnson
Fulltime in our 2001 Alpine Coach
Presently near Lafayette, LA
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Old 10-11-2012, 06:15 PM   #2
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Any plumbing supply house will have the adapters. Cost about 4 dollars each. You need copper to Pex adapters.
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Old 10-12-2012, 11:26 AM   #3
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On my '04 coach the Pex tubing for the faucets is connected to a Pex Flair-it fitting that has the Pex barb on one end, and a 1/2" male pipe thread on the other, with a taper on the inside to mate with a 1/2" compression fitting. Most kitchen faucets come with a fitting expecting to be connected to a 3/8" compression fitting on a shutoff valve. It is likely to have a 1/2" compression fitting on the other end at the faucet. I just had to replace the 1/2" and 3/8" compression fitting hose with a 1/2" and 1/2" compression fitting hose at ACE or Home Depot.

The Pex Flair-it fittings used on our coaches are not common at hardware stores, but are relatively easy to find at RV parts stores. There are lots of different kinds of Flair-it fittings available to mate with copper piping.

PEX Plumbing & PEX Pipe - PEX Fittings Flair It Bulk - mobilemart.com

PEX Plumbing & PEX Pipe - PEX Fittings Flair It Bulk - MLE ADPTR 1/2" X 1/2" MPT - mobilemart.com
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Old 10-23-2012, 09:46 PM   #4
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RV faucets made by Phoenix Brass for RV's are a match in appearance and fittings that match up with our Alpine plumming. Available direct or in non-appearance matching versions at Camping world. I wish I didn't know this!
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Old 10-24-2012, 02:16 PM   #5
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Easier than the Flair-It type fittings are John Guest type fittings that seal by o-ring & metal grabbers. Sometimes called "stab" or "push" fittings, you press the square end cut of bare tubing into the fitting, encounter the o-ring's resistance, push harder & POP the fitting past the o-ring.
You can get versions of these in other brands at Home Depot & Lowes (H.D. brand in brass is "SharkBite"). You will be looking to cut off the existing Flair-it fitting to a clean square 1/2" o.d. PEX tubing end, then apply a new "push by xxx" fitting, where xxx matches to the gender & thread of your new faucet. The orange apron at H.D. or blue apron at brand L home improvement centers can help if you take in the old PEX pipe end & your new faucet (or use one of theirs for show & tell?). Should be either a straight or 90 degree single fitting that will adapt easily. At most 2 pieces per hot or cold end.
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