I think my plumber is on vacation for the holidays ( well deserved ) so in the meantime, I will toss a couple questions at you fine folks.. I am installing two sinks in my basement darkroom, one 9 foot SS that will be 36” high in terms of low point and a 6 foot SS that will be the roughly the same. They will be divided by a wet basin transition area that will hold both my Job CPP3 and 16x20 print washer, 9 footer on the left, 6 footer on the right. Right below that wet transition area is my hot / cold water inlet and drain pipe, it will also house my sump pump and related infrastructure. The drain pipe comes in at about 21” off the deck and there is 28” of clearance between the floor and the underside of the wet basin. I have hunted high and low for answers but I am trying to figure out venting for the two sinks. I am not sure what is code for my area, I am sure the plumber will know once he gets back to me but I am at the point in that the rest of the wet side design will need to reflect the venting needs and I am ready to move on it. Typically what are people running into here with basement installs and sump pumps, are you going through the major hassle of connecting to an existing vent stack like I would have the plumber do in the crawl space ( $600-$1,000 ) or are air admittance vents doing the trick? The water distribution is pretty straight forward but this drain venting thing has me stumped.