Marc 88 Posted June 5, 2019 Report Share Posted June 5, 2019 This is a condensate drain for an AC indoor section installed on a shelf in a hallway closet. It's vented on the suction side of the blower. Am I correct in assuming that there is no trap installed within or beneath the slab? Do plumbers ever install traps within or under the slab? Quote Link to post Share on other sites
Les 80 Posted June 5, 2019 Report Share Posted June 5, 2019 relatively common here in mid-Michigan. not common in floor drains, only sanitary. only way to know is visual or a sewer scope. Quote Link to post Share on other sites
Jim Katen 153 Posted June 6, 2019 Report Share Posted June 6, 2019 In my area, that drain is generally trapped. It's easy enough to find out for sure. Quote Link to post Share on other sites
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