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Old 06-18-2015, 07:45 PM   #1
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PVC to ABS in a pressurized line?

What's the best way of going from PVC to ABS on the waste line from a sewage pump?

All the piping and fittings for the pump, check valve and ball valve are in PVC, but all the rest of the pipe in my house is ABS.

I live in Ontario Canada where as far as I know, transition cement is okay, but I've read that its not in many other places which leaves me questioning if I want to go there.

Fernco banded couplings seem like an option, but have a maximum pressure rating of 4.3PSI....is this enough for my application?

Alternatively, I'm not sure if male/female threaded fittings can be used to make this transition?

Any thoughts?
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Old 06-18-2015, 08:09 PM   #2
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Obviously you done some research and appear to be on the right track.

I Don't know about Canadian code. Oatey makes an abs to pvc transition cement. Don't know if that's a violation of code or not. I like using the proper transition coupling as you have mentioned. Just a thought.

Please wait for the plumbers to respond, they will know for sure. Thanks.
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Old 06-18-2015, 08:27 PM   #3
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Use a all rubber fernco coupling.
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Old 06-18-2015, 10:57 PM   #4
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Locally we use transition glue or "fernco" couplings. I have seen the pipe separate from ferncos though but haven't seen glue joints separate- but the glue is not approved every where. You can buy the check valve with the rubber fernco connectors built into them too
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Old 06-19-2015, 05:34 AM   #5
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Male adapter in 1 material, female adapter in the other.
My electrical answers are based on 2017 NEC, you may have local amendments.

Location: Coastal South Carolina
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Old 06-19-2015, 10:33 AM   #6
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I think you will be fine with a banded coupling. As long as there is something else that's vented and draining in to the system by gravity, then water will simply back up that drain rather than build up any appreciable pressure.
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