Cooling Coil Condensate Drain Pipe Sizing
Cooling Coil Condensate Drain Pipe Sizing
(OP)
Is there a standard or code required condensate drain line sizing procedure or chart? I have charts from different manufacturers that I have used for sizing these pipes but none of them say where they got the information from.
I have looked up IMC and IBC but did not see any information.
I have looked up IMC and IBC but did not see any information.





RE: Cooling Coil Condensate Drain Pipe Sizing
RE: Cooling Coil Condensate Drain Pipe Sizing
RE: Cooling Coil Condensate Drain Pipe Sizing
RE: Cooling Coil Condensate Drain Pipe Sizing
RE: Cooling Coil Condensate Drain Pipe Sizing
I never use less than a 1" pipe for condensate drainage, because as others have said, debris can clog the line if it is too small.
An 1-1/4" line can handle about 33960 cfm of outside air going from 95/80 to 55/54.
RE: Cooling Coil Condensate Drain Pipe Sizing
Best to you,
Goober Dave
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RE: Cooling Coil Condensate Drain Pipe Sizing
RE: Cooling Coil Condensate Drain Pipe Sizing
CarolinaPE has the sizing right,those are the current values given from the IPC(2009 edition)Section 314.
Btw, do the plumbers a favor and stay away from using 1 1/4",especially if it's PVC,it's increasingly hard to find,and generally costs more then using 1 1/2".
Also keep in mind,that condensate disposal falls under the jurisdiction of the plumbing inspectors,and when combining mulitiple condensate lines to a single source,the condensate system has to be piped in,according to the plumbing code,which means the use use of Wye's and T-Wye fittings,for branch connections.Those fittings are not available in sizes smaller then 1 1/4".
RE: Cooling Coil Condensate Drain Pipe Sizing
CarolinaPE nailed it as it is the same as this table....
agree w/ the clogging thing.... but here is a starting point.
RE: Cooling Coil Condensate Drain Pipe Sizing
I completely disagree with Chicopee (nothing personal). You wouldn’t size drainage to have a certain velocity to purge dust and contaminants… the bigger the better. Go a little larger if you are unsure.