1651 Venting an Island Sink if Below Floor Trap Not Permitted - Plumbing - Venting -

Image Text: Fixture outlet pipe (tail piece) > island sink > vent > if the code-allowable tail piece length does not permit the trap to be located below the floor, a LOOP or CIRCUIT VENT arrangement will have to be provided > vent > wall > floor framing > cleanout > foot vent > drain