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Old 08-25-2016, 09:53 AM   #1
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PEX Water Line leak

Recently, I noticed water leaking out of the low point drain of my Coachmen Apex. After investigating it, it turns out the water is not leaking from the drain itself, but it seems to be the PEX water line under the floor that goes to the bathroom sink. The other side of the line comes out near the hot water tank on the other side of the camper.

My question is this: If I remove the leaky water line, how difficult is it to feed a new line under the floor? It seems to me it's worth a shot, but don't want to be stuck with no water on our next trip.

Thanks in advance.
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Old 08-25-2016, 10:05 AM   #2
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Not that this answers your question, but recently had same sort of leak in my bathroom. Saw dripping outside. Turned out not to be line but a plastic right angle fitting in between 2 pex lines very slowly dripping. Cheap plastic Ts and 90s . I bought a pile of shark bites and replaced them all. Wasnt going to deal with more leaks due to those cheap parts. Just something to check before you assume it's the pex itself.
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Old 08-25-2016, 10:14 AM   #3
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I didn't realize Shark bites and PEX were compatible. I have used the SB in traditional copper plumbing in my house, so I am familiar on how good they are.


This is great news as we are taking delivery of a "new to us" Palamino 340RK soon and during PDI I noticed PEX everywhere with all original fittings.
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Old 08-25-2016, 10:23 AM   #4
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SharkBite Push-To-Connect Fittings - How to Install PEX Tubing, Copper Tubing, and CPVC Tubing - SharkBite


No issues with SB and Pex!
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Old 08-25-2016, 10:29 AM   #5
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Yeah, I've already replaced some of the cheap fitting with Sharkbite. They're great.

I was hoping it was just another fitting that needs replaced, but the water is seeping from under the floor. I just don't know if I can easily feed a new PEX tube under the floor where the current on is. Seems like it should work, but if not, I don't know how I would fix it. It seems to be the only option other than ripping up the floor.
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Old 08-25-2016, 12:27 PM   #6
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I changed out the FR water filter (with the $30 cartridges) for a better filter system and reasonable filter prices. I bought several small sections of PEX and a PEX clamp, plus rings. To make a VERY long story short; just go with Shark Bite fittings. Getting the PEX connectors crimped properly so they don't weep slightly is a major task. Shark Bites are more expensive, but they do the job the first time without leaks.
Sorry, I don't know how you can run a new line in your particular unit.
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Old 08-25-2016, 12:28 PM   #7
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Connect new tube to old and pull it through? A dowel in both tubes and some tape. I've pulled new wiring this way.
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Old 08-25-2016, 12:31 PM   #8
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if the line goes straight across, get a 1/2 inch barbed coupler fitting at the hardware and stick it into the old and new pieces and pull it through it might help to have someone push as you pull it keeps it from pulling apart.
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Old 08-25-2016, 12:52 PM   #9
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I did not think of connecting the new line to the old line. I'll give that a try this weekend. Thanks everyone!
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Old 08-25-2016, 01:19 PM   #10
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Quote:
Originally Posted by rslavonic View Post
Recently, I noticed water leaking out of the low point drain of my Coachmen Apex. After investigating it, it turns out the water is not leaking from the drain itself, but it seems to be the PEX water line under the floor that goes to the bathroom sink. The other side of the line comes out near the hot water tank on the other side of the camper.

My question is this: If I remove the leaky water line, how difficult is it to feed a new line under the floor? It seems to me it's worth a shot, but don't want to be stuck with no water on our next trip.

Thanks in advance.
I'm not sure why you'd want to pull out the old and replace. I'd find the cause of the leak and address it. If it's a bad joint, redo it. If it's a split in the pex, cut out the bad and splice in a new piece with your favorite method. I doubt you can just pull it out. It's going to be held in place at various points along its path.
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Old 08-25-2016, 02:05 PM   #11
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I'm not sure why you'd want to pull out the old and replace. I'd find the cause of the leak and address it. If it's a bad joint, redo it. If it's a split in the pex, cut out the bad and splice in a new piece with your favorite method. I doubt you can just pull it out. It's going to be held in place at various points along its path.
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Old 08-25-2016, 02:16 PM   #12
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Okay, I didn't realize it's held in place at various points. Thanks for that warning. But there is no way to get to it under the floor without pulling it out. It's below the floor of the camper and above the grey water tank. Anyone know how to access?
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Old 08-25-2016, 02:21 PM   #13
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Okay, I didn't realize it's held in place at various points. Thanks for that warning. But there is no way to get to it under the floor without pulling it out. It's below the floor of the camper and above the grey water tank. Anyone know how to access?

Cut it out on both sides of the tank and replace ~~ or drop the tank. You do not want to pull the floor.
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Old 08-27-2016, 11:40 AM   #14
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I ........
Sorry, I don't know how you can run a new line in your particular unit.

I don't know either but this is what I would do. If you have both ends of the affected line put a SharkBite coupler on the old line attach the new line to it and see if you can pull it through

If that doesn't work see if you can push the new line through the old route and if all else fails surely with some additional lenth of pex you could reroute the line, stick it in a foam pipe cover for protection and weatherproofing and call it successful
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Old 08-27-2016, 11:55 AM   #15
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I spoke to an RV Repair center about 'Sharkbites' for connections to install in my unit and was told that they would NEVER use them as they will come loosen do to the vibration and movement of the RV Unit. They said that it was 'my' unit and I could install them myself, but if the unit came to them with a 'leak' and there were 'sharkbites' on it, they would remove them and not reinstall them or not work on the unit at all because of them or imply any warranty work because of them.... (they must have had a really bad experience with them)

Do not slam or spam me on this, this is what I was told at this certain RV Repair Center.
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Old 08-27-2016, 01:50 PM   #16
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I spoke to an RV Repair center about 'Sharkbites' for connections to install in my unit and was told that they would NEVER use them as they will come loosen do to the vibration and movement of the RV Unit. They said that it was 'my' unit and I could install them myself, but if the unit came to them with a 'leak' and there were 'sharkbites' on it, they would remove them and not reinstall them or not work on the unit at all because of them or imply any warranty work because of them.... (they must have had a really bad experience with them)

Do not slam or spam me on this, this is what I was told at this certain RV Repair Center.
May as well get in the soup with you on this one. Sharkbites are great for some applications, but when you have all of the jostling going on in an RV, I would not recommend them (note: crash helmet on for all the flack). I recently installed a reverse osmosis system that used shark bites and installed a pressure pump along with it. At least 4 of the connections leaked. And yes, the pipes were cut off square. If there was any side tension, they could leak. Research indicated the solution was compression fittings. Took the advice from more than one source and no more leaks.

I have used sharkbites under a residential kitchen sink with success. I was always concerned when when bumping the fittings. For the RV, I have used Pex fittings and a crimp tool-no leaks. But, I believe compression fittings would also do the job.
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Old 08-27-2016, 02:06 PM   #17
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I have used Sharkbites on my previous tt and my current tt with no problems. Both tt's have traveled all over the country on all kinds of roadways and some places that I would not call a roadway. I also have used them on my home water lines with no problems. Just saying..........................

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Old 08-29-2016, 07:58 AM   #18
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I was able to get my leak fixed this weekend. There was a very small hole in the hot water line. Not sure what could of caused that? I attached the new line to the old one using a coupling and some gorilla tape. I pushed the line while someone at the other end kept it from getting caught up on something.

I did use sharkbite fittings, so we'll see what happens. I'll report back if they cause me any problems.

Thanks again everyone for your help!
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Old 08-29-2016, 12:48 PM   #19
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Super!
Hope that is the end of that problem for you!

Thanks for updating us.
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