Two Basement Sink Install w/undersink pump - venting

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djbarber2

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Currently roughing in two basement sinks (one for bar, one for workshop)...they will be on opposite sides of a wall. Trying to figure out how to vent this arrangement properly. I plan to have each sink on their own p-traps and separate drain lines into each side of the pump. I will vent the pump to attic, however, I've seen various codes that require the sinks drains to also be vented. I've attached a sketch of what I am thinking (circles are where pipes go into the wall). I would attach a double-Y at the pump drain and attach both sinks to it (with p-traps up stream), then I would provide a vent to the third leg of the double-Y which would then wye into the main vent stack coming from the pump. Let me know if I'm missing something..not sure if this "double venting" is really required.
 

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Terry

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The sewage pump needs a vent, and any fixtures dumping into the sewage pump need to be vented, the same as any other plumbing.
 
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