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Re: Unusual Air and Noise from Bath Sink - AC primary drain
The primary drain line (as you described) needs to be trapped;
M304.8.2 SEAL. The condensate drain system shall provide a seal thatprevents ingestion of air or other gas, through the condensate drip pandrain and overflow connections, from all outside sources, including thecondensate disposal place.Source Standard Mechanical Code 1997
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"If con is the opposite of pro, is Congress the opposite of progress?"
Richard Rushing, HCRI
Duncanville, Tx.
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