Membrane metering pump for dosing 16% alumina sulphate solution, capacity 0-400 lh, with ball check valve, tropicalized motor 110-230 V, 60 Hrz, with the following accessories: anti-siphon foot valve , Discharge shut-off valve, 3 meters reinforced polyethylene suction hose, 10 m reinforced polyethylene discharge hose, 4 zipper clips. With Operation and Maintenance Manual in Spanish. Include membranes, joint sets and the set of suction and discharge valves