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I am installing a laundry tray pump under a sink using pvc to pump sink waste up to my home waste pipe (about 4’ up). I want to be able to easily disconnect the pump “box” if I need to service the pump so I do not want to cement all of the pvc fittings. Here’s the set up: 2” pvc pipe from pump discharge to a 2” drain intake in the wall…this is only a distance of about 15”. I was thinking of cementing everything but cutting the 2” pvc pipe going into the wall in half and coupling it with 2” rubber no hub. The thing is that this line will probably always be filled with 4 feet of water (pump has a check valve)…so I am afraid the no hub will leak. Is there a more correct way of doing this?
 

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The rubber coupling would probably be fine, they are used on sump pump check valves all the time. If you are still concerned just buy a PVC union and glue it on the pipe. They have three pieces and seal like a garden hose with a nut that has a washer pressed against the other half.
 

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