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midlifeboat

05:45AM | 05/16/05
Member Since: 05/15/05
1 lifetime posts
Bvplumbing
I am installing shut off values and flexible hoses for the hot and cold supply lines in a cabin. The plumbing is all 1/2 inch PVC, so I have a union to go from PVC to copper which screws into the shut off valve. I was told to use Teflon tape, which I did, but it's still leaking. Tape is wrapped the correct way and we have tightened as much as possible.

Is it necessary to use a rubber washer (not sure of the right term) between them to help with the seal? Is that what we are missing?

Thanks

RayVinZant

07:04PM | 05/19/05
Member Since: 08/29/04
227 lifetime posts
Here's what I do. I start the teflon tape at the end furthest away from the front of the thread, wind towards the end that threads into the fitting, then wind back towards where I started and cross over my end. This prevents any end from catching on the threads I'm inserting into. Then I use a little teflon pipe dope on the outside of the teflon tape to allow the tape to slide in the threads without slipping. This procedure virtually guarantees you won't have a leak.

Good Luck

Raymond VinZant Plumbing Prof.
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