My hvac guy has installed Fujitsu mini split ac drain line to attic waste gas vent pipe but skipped the p trap. Just wondering if indoor could bring in waste line gas from the vent pipe when not in use.
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My hvac guy has installed Fujitsu mini split ac drain line to attic waste gas vent pipe but skipped the p trap. Just wondering if indoor could bring in waste line gas from the vent pipe when not in use.
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