with 1" outlet tap (red handle) for faster water drainage To vent you need our number twice 19, which you need to connect with a piece of hose and attach to the upper tanks. If your tank has a fine thread or a larger diameter at the outlet, Please note: The screw cap with coarse thread, Plastic, blue, with 3/4" IT, (does not fit IBCs with fine thread or cross bar on the front edge thread on the factory tap) If you want to buy several items, place them all in the shopping cart first, This is the only way to optimally combine the shipping costs. Delivery time is about. 1-2 days after receipt of payment with parcel shipping so that nothing stands in the way of a positive evaluation on your part and on our part. You can reach us: Mon.- Fri. from 9 a.m. to 12 p.m. and 1 p.m. to 4 p.m See Sel.