BAC RS-335 Remote Sump Tanks can easily be added to cooling towers, closed circuit cooling towers, or evaporative condenser systems. Adding a remote sumo tank can simplify water treatment for multiple cells and facilitate the dry operation of closed circuit cooling towers and evaporative condensers by eliminating the need to drain the cold water basin when switching from wet to dry operation. Model: RS-335, Serial No: 944117. Maximum Storage Volume(Gal): 335 Gallons. Minimum Operating Level: 8 1/2. Net Available Volume(Gal): 257 Gallons. Shipping Weights(LBS): 470. Maximum Weight(LBS): 3410. Suction MPT(in): 4.