Variable capacity tanks with welded legs and round door 400mm dia.at base, 304 stainless steel with pumps and pressure gauge, air tube,airlock release valve, crane arm, metal protected volume gauge. Also included are sample tap, partial and total discharge points with butterfly valves legs thermometer and ladder rest. Optional dimple plate available in 500mm or 750mm circumference. Winch available from 2500lt models and must screen behind the discharge valve.