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JulieB888's avatar
JulieB888
Explorer
Jan 02, 2017

Leaky Water Pipe

Hello kindly folks,
I have an urgent issue with a leaky water pipe. It appears that the seams in between the two pipes that meet in my cupboard are wearing thin and need to be reinforced. My first question is: what is the best material to use to seal it? I am thinking liquid silicone but I know that it's highly toxic and I wonder if its safe for a drinking water pipe.

My other problem is that I am living in the RV so I am not sure how I can use it because I am pretty sure that the area needs to be perfectly dry first. Any suggestions would be highly appreciated!

Thank you!
  • What color is the plastic? Black, gray,red or blue? If it's black and about 2" in diameter,it's a drain line and maybe a bit a sealant might help. If the pipes are about 3/4" in diameter and red, it's the hot water line. If it's blue it's the cold water line . If it's gray it's a cold water supply line.I don't think any sealant would work on the red, gray nor blue lines. Which one is it?
  • I just called five different hardware stores looking for eternabond, they don't seem to carry it here, and I can't order onine easily because I live in my RV. Can anyone recommend a different brand?
  • Julie B888,
    Not sure if I can help you but let's maybe try to clear up some terminology here. The connection between the two pipes are called the joint. If the pipes are PEX, there are no "seams".
    What brand of rv is this and the age? Forget about silicone of any sort to repair the leak. If you do find silicone where the leak is, someone has done a hokey bandaid temporary repair at best. A thought that came to me is that the piping might have frozen at some point and has compromised the joint where the pipes come together. If the pipe is pex maybe the metal crimp piece has loosened and is causing a leak. If that's the case then you need to go to Home Depot or an rv place and get a Flair-It or Shark Bite fitting and replace the old leaking one. First things first, what rv are we talking about and it's age? Are the pipes some plastic type material or is it metal?
  • Now I really wish I could post a photo, any idea if that's possible?

    The area from which it is leaking already has some kind of silicone-like material around it, but it has clearly worn thin.
  • If the leak is between the joint where the pipes come together then my first inclination would be to try to tighten the connecting nut by twisting it tighter after you turn off the water pump or city water supply. If it helps but still leaks a little, use maybe a pliers on the nut for leverage. This is assuming, of course, that you have PEX piping which is a rigid material but slightly bendable.
  • Ernie, I am not sure how to upload a photo on this forum. It seems that I only have the option to provide a link. But I can tell you that the problem is the connection between the two pipes and not with the cabinet; the cabinet is merely absorbing the leaks. It is possible that the pipes had frozen, the problem is clearly the seams.

    Thank you Omjones, I will try out that tape. I hope that an easy solution like that is all i need
  • Based on your explanation I can't tell what the problem might be. Is it the connection between the two pipes or is there some friction from the pipes rubbing against the cabinets that is wearing through the plastic lines. Might the water lines have frozen and maybe causing the seams to give way ? A picture would help a lot. My first thought as a repair would be to cut out that section of pipe and replace it with Shark Bite fittings or some similar material.
  • Maybe you might be able to wrap it with eternabond tape. It seems to be good for leaks of all kinds.
    john 'I am Canadian'