If you don't have regular maintenance on your AC then algae will grow in the drain pipe and clog it. Using the vac works but I've heard from the AC tech to pour a pint of vinegar ( another tech said bleach) in the white PVC stand off port once a month. We opted to have regular maintenance.
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LI SNOWBIRD LI, Tall Trees
"Every heart sings a song, incomplete, until another heart whispers back. Those who wish to sing always find a song. At the touch of a lover, everyone becomes a poet."
Plato
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