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greyboy39

P trap directly into main stack

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Had an inspection today with a p trap plumbed directly into the main stack serving the furnace/A/C condensation line. The house was slab on grade built this year. Anything wrong with the configuration? If so, any code cite would be greatly appreciated. Thanks

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Edited by greyboy39
Punctuation error

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It's an indirect drain for non-potable, clear waste water. It's ok. The air gap prevents a sewer back up from fouling the heating/ cooling equipment. The only draw back may be if the heating/ cooling system goes unused long enough for the trap water to evaporate and lose the seal. That's a stretch though.  

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32 minutes ago, greyboy39 said:

Thanks for the clarification Chad. I initially thought it could potentially back siphon as a result of being too near the main stack. 

The air gap isn't big enough. I shouldn't have said "OK".   Honestly, I thought you were asking if it was OK because it was an indirect connection. I just spent 7 or 8 horrible minutes reading the plumbing code. It's all in chapter 8 of the IPC. I'll email it to you if you want.

 

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"Indirect" needs an air gap.

airgap.jpg.c43dfe7ec45eef5606cff536bdc9cc3b.jpg

More and more municipalities are requiring an acid neutralizer for the condensate.

Does that P-trap have a long enough trap arm?

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