yes mate..... it converts to roughly 84??? and the extractor is placed at the top of the box,,,Yeah probably didnt explain venting well enough ,, it actually vents into the large main pipe that the smaller sink wastes run into idea being pipe should only hold water when sink is in use.....Was the best i could do at the time, and has really helped odur issues??? does this sound bout right??? Actuall grow space is in my garage and kitchen pipes run in there seemed the best option????
Am also a little worried with how cold they are getting in the night<when lights out> with the garage itself not being insulated it gets a little cold in there???
Thanks for intrest,,, and more advice???