Air Pump System for H2S (sulfur) odor and Ferrous iron problems. A 230 vac Air Pump System with a 10" x 54" vent tank with bubbler stone, a 1" PVC check valve and 1" in/out Sch. 80 PVC head, and the filter is a Clack WS-1 controlled 1.5 cuft Centaur carbon filter with gravel underbed, a 1.05" distributor tube and 1" Noryl by-pass valve and plumbing connectors. Free Shipping. $1300