Umm, yea, I have a customer who has built an addition (metal building on slab) and is finishing the interior. The "plumber" has roughed in everything to stub-outs (drains only). I'm there to finish the interior. Arrive today for a pre-job walk-through and notice the drain stacks to the individual fixtures (namely, the vanity, toilet, kit sink, and laundry tub) have no vents. The stubs are just capped PVC about 3 feet from the slab. I ask where's the vent stack? Customer says the plumber told him it was a "ventless" system.
Now, I realize he's been hosed, but what advice do I give on remedying the problem? I was ready to set the shower unit tomorrow, but...if the drain is not vented (every thing's creted in now, of course), any fix would likely require the floor under the shower to be broken out so the plumbing can be redone... Correct? Any chance I've been living under a rock for sometime and there's some new "ventless plumbing system"---and I'll look stupid for telling him his plumber screwed him? And is there a fix that won't require the slab to be torn up?
For the record, I once built a small (600sf) house and vented all plumbing fixtures (1.5 baths and kitchen) through a single 1-1/2" vent leg on the upstairs bathroom.. Totally wrong, but the system 'worked' fine.
But I don't want to experiment with any half-baked remedies with my customer... The kit sink, vanity and laundry can still be properly vented--up and out--but what of the toilet and shower?