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Old 05-10-2009, 04:38 PM   #1
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Converting copper to schedule 40 pvc


I have a double check valve assembly for my sprinkler system, installed by a plumber. I am planning to do all the work after the DCVA myself, in PVC. THe DVCA has a female 1" threaded copper connection on the outlet.

How do I go from that to PVC? Can I screw in a PVC adapter right into the copper (the adapter would be male 1" threaded to female 1" slip).

Thanks.

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Old 05-10-2009, 05:15 PM   #2
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Converting copper to schedule 40 pvc


Using a male adapter should be fine. I have seen problems with female PVC adapters, and some areas do not allow them. They have a habit of leaking and cracking.

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Old 05-10-2009, 05:35 PM   #3
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Converting copper to schedule 40 pvc


Great, thanks.
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Old 05-12-2009, 11:35 AM   #4
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Converting copper to schedule 40 pvc


You mean male on the PVC adapter end, right?

Like...if situation were reversed and the DCVA had a male threaded end, you'd have me convert male to female with copper, then screw in male PVC threaded?
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Old 05-12-2009, 01:21 PM   #5
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Converting copper to schedule 40 pvc


YUP. PVC female adapters are easily over-tightened and crack fast. I hand tightened one and had a leak. When I removed it, crack was apparent and I did not force it by hand.
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Old 05-12-2009, 03:51 PM   #6
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Converting copper to schedule 40 pvc


PVC Female to PVC male....that's ok, right?
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Old 05-12-2009, 07:40 PM   #7
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Converting copper to schedule 40 pvc


If both lines are PVC, they should be glued. Female PVC adapters are a problem. If you want to take the chance of a leak, use the female adapter.
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Old 05-12-2009, 10:01 PM   #8
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Converting copper to schedule 40 pvc


OK, got it.

What about PVC unions. They OK? I want to put them after each of my valves so I can disconnect them and take them inside (along with the whole manifold) for the winter.

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