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Replacing poly butyl water pipe

Posted by Bruce M on December 6th, 1998 10:40 PM
In reply to Plastic Water Supply Pipe by George on December 4th, 1998 02:58 PM [Go to top of thread]

6 of 12 people found this post helpful

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> My Polybutylene, Poly Butyl, Plastic, PB, Quest/Qwest pipe is leaking or brittle, Find Help Here! by Handyman on 10/26/2004

Hi George
You are right to be concerned about this water pipe. The key concern to you is the chlorine level in your water. I can't recall specifically what the parts per million threshold is, but I think any water with over 7 ppm chlorine is a candidate for poly butylene pipe cement to fail...meaning the pipes joints will eventully burst. I'm not 100% sure on this and am doing if from memory you might want to check.

As to replacing the existing pipe....copper is really your best bet. I know, sweating the joints in a crawl space in between floor joists is not one of life's more pleasant jobs....and I dislike it too. But in the long run, copper will be the most dependable, least likely to fail and virtually maintenace free (provided it doesn't freeze :-)

However, if you absolutley must reinstall plastic, I use CPVC, which is approved in most areas for hot and cold water. It glues up with its own special (yellow) adhesive and goes together just like PVC its quite easy. They make a copper-to-cpvc union that you sweat onto the end of the copper run and then glue your CPVC to the other end.

Hope this helps


Bruce M

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