Condensate piping

[Charley L. Bottger]

[quote=Marc D. Shunk]My comments were based on the theory that any condensate snot at either of the yellow arrows would cause AC condensate to back up into the furnace. I know that it remains quite normal for both condensate drains to share common pipework. (quote)

Marc; I understand what you are saying but I most usely find cold water slim (snot) as you call it in the P-traps or the condensate pan themselves where there is water standing not flowing constantly those fittings that you are pointing to would drain dry every time the A/C shut down thus be very hard to impossible to block those lines. Anyway it should be a normal maintenance process to flush bleach down these lines a couple of times every cooling season. That is why a Tee should be installed at the outlet of the A-coil with a stand pipe and cap to allow easy bleach adding. Most present day contractors don't even think along these lines.


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