How to cut new thread in PVC elbow, Leak in threaded PVC plug


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Old 09-12-17, 08:29 AM
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How to cut new thread in PVC elbow, Leak in threaded PVC plug

I have a leak in a threaded PVC plug with a 1/2" thread. The plug is in a 2" diameter 90 degree PVC elbow in a pool skimmer line (See attached pictures).


The existing thread in the elbow has play and the plug can't be tighten.


One way to fix it would be to enlarge the 1/2" threaded hole to 3/4" and use a 3/4" plug. Can anyone tell me how to drill a larger threaded hole? I don't know what tool I would need to do that.


Are there any other ways of fixing this leak?


Thanks

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Old 09-12-17, 08:37 AM
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What if you wrapped it with a lot of Teflon tape?
 
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Old 09-12-17, 08:40 AM
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Thank you for your suggestion. I am not sure it will work with the play it has, but I will try before looking at more complicated options.
 
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Old 09-12-17, 09:02 AM
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I imagine that you can add some glue.
 
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Old 09-12-17, 02:26 PM
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Try a flat rubber washer that fits tightly over the threads of the plug, and use lots of teflon tape on the plug threads.
 
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Old 09-12-17, 03:11 PM
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Drill out the 1/2 inch hole

Hi,
If you want to drill out the existing 1/2 inch hole and increase the size to 3/4 inch, drill the hole out with a 29/32 inch bit, then cut new threads with a 3/4 inch 14 pipe tap. Make sure there is enough PVC in the side of the pipe for the new threads. Use soap water as a lubricant while performing these procedures. To guarantee no leaks when installing new plug, use teflon tape and a good pipe dope. Good luck with your project.
 
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Old 09-12-17, 03:50 PM
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Never seen that type of fitting, looks home made.

Just cut it out and put in a new Tee, bush it down to the correct size and do it right.
 
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Old 09-12-17, 05:25 PM
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Why not just buy a new fitting meant for the pool skimmer?
 
 

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