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How To Clear An A/C Drain Line Easily


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Those are nice to have on an AC service truck for the easier clogs. Sometimes it's still necessary to replace condensate traps or 3/4 PVC lines when the clog is stubborn. I've rarely found the plumber's provided 2" drain opening to clog. That's why it's best to have it close to the evaporator coil.

Marc

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I used to have a two heat pump system and the second floor unit condensate drain clogged frequently. Could never figure out why. It was 3/4 inch plastic pipe. I cut a section of bicycle inner tube about 3 or 4 inches either side of the shrader valve. You could position it with the valve over the pipe end, secure the tube by hand, and apply a low pressure shot from a portable compressor. It usually took between 20 and 40 psig to clear it. Good to go till next year. Never saw any crud accumulation on the coil.

//bb

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