Well the inevitable happened this evening with a clogged AC condensation line. Came in and living room ceiling was soaked and dripping water. The drain ties in at the bathroom ptrap. Was able to get the clog free and water flowing again by taking it apart under sink and snaking it. The leak was coming from the pipe that appears to be a clean out pipe circled in pic. Is this a normal install as there is no cap or anything stopping the water? It was basically overflowing from the pipe. Could I put a removable cap to seal this so it overflows into pan if it happens again? Just can’t believe there wouldn’t be a cap on this. Thanks.
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AC Condensation Drain Advice
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Originally posted by txtimetravler View PostPretty sure that open PVC is there to pour bleach in…or force air to clean the line.
If that was capped, the clog would have still pushed water up until it leaked out.
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That’s called a breather stack. It keeps water flowing at a better pace than if it is capped, like like a vent on a sink or other plumbing fixtures. it also keeps the equipment from sucking water/air into the pipe above the p trap in some situations. It does need to be higher than the primary pan for the evaporator coil though. Basically higher than where the lines exit the coil box like someone else mentioned. Put a coupling and a few more inches of pipe on there.
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