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MelAuston 10-30-2007 02:16 PM

Repairing black poly pipe
I recently bought a small investment property that has a leak in the line that has the meter at the main running slowly. I turned the shut-off at the house off and the meter continues run slowly. I heard the sound of water running under the house and found a 25 foot length of black poly piping that seems to T off the galvinized pipe that services the kitchen and bathroom and runs in the crawlspace to the washer and utility sink in the laundry room. I say "seems to" because there's no water running at all in the house yet there's a slow, not high pressure flow in that line. I found 2 leaks in the line and opened the spigot in the utility sink to release the pressure. I then replaced about 20 feet of the black poly with new 120 psi black poly from Home Depot using double-end barb connectors. I have been at it for over 6 hours and can't get the joints and the new connections to completely stop dribbling. I have really cranked on the hose clamps (2 on each side of the slice) and still it dribbles. PLEASE HELP ME!! I just want it dry so I can wrap some insulation around it and get on with life.

scrapiron 10-30-2007 08:07 PM

Try heating the plastic with a hair dryer or heat lamp and tightening the clamps while the plastic is warm.

RippySkippy 10-31-2007 01:53 PM

on your clamps do you have them facing opposite directions? As you look at the clamp do they pull opposite of each other? Heating may work as well...if you don't have electricity handy, use a propane torch...gently though....

Marlin 10-31-2007 05:20 PM

Hose clamps on pressure pipe? Bad idea.

Chris Johnson 10-31-2007 08:54 PM

Repipe it properly, don't use barb fittings under that kind of pressure, the question isn't how do I stop it leaking, it is when will it leak again!!

At the T on the galvanized use a PEX fitting and replace with pex pipe to the termination points

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