20 Gallon Applicator Sump tank. This tank is designed to be used in portable and both stationary situations. This tank comes standard with a 5" vented lid and features a 3/4" drain fitting. The Ace 20 Gallon Sumped Rectangular applicator tank has a specific gravity rating of 1.7 and is constructed from medium density polyethylene with U.V. inhibitors. Dimensions 14 x 28 x 12