Leaky PVC coupling

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  #1  
Old 05-31-19, 09:25 AM
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Leaky PVC coupling

Hey all, will someone please advise on an easy (if it's possible) fix for a very, very slow leak coming from a PVC sleeve coupling in the main drain line under my house? One side of the sleeve is dripping. I'm pretty good with repairs but I don't have PVC experience and I would prefer not to cut out the sleeve for such a slow leak unless it's absolutely necessary.

Is there some kind of PVC glue for this?

Thanks for advice.
 
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Old 05-31-19, 09:32 AM
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I don't know of any way to stop the leak, you need to cut out a section and glue in new.
 
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Old 05-31-19, 09:42 AM
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Ok, thanks. I was hoping the magic of chemistry had come up with something.
 
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Old 05-31-19, 09:45 AM
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I can cut it out with a saws-all, but the line is being supported along it's length too. Do you have to be super careful about vibrating and flexing the line any, or is it pretty low risk that you'll pop another joint somewhere?
 
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Old 05-31-19, 10:06 AM
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Daubing the joint with PVC cement might seal it up if the leak is very small and it is not under pressure. Dry it as much as possible (with a hair dryer) before applying cement. Use a stiff bristle brush to jam the cement (and melting PVC) into the joint. The more of the PVC surface you "melt" with the cement the better the fix will be.

An inspector let me do this once to seal up a joint in a vent line that weeped slightly under pressure while being tested (after the test pressure was eliminated).
 
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Old 05-31-19, 11:06 AM
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Is this a pressure line or waste line?
 
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Old 05-31-19, 11:15 AM
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When you say a "sleeve coupling" do you mean a PVC coupling which is a white hard plastic glued fitting or do you mean a rubber Fernco sleeve which is black flexible rubber and held in place with hose clamps?
 
  #8  
Old 05-31-19, 12:23 PM
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It's a waste line only and the coupling is a PVC sleeve. Somebody in the past repaired another part of the line with one of those rubber sleeves, so I'm tempted to go that route now. I think I'll try the cement first.
 
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