Beckson's siphon pump features a 2" IPS Bung standard adapter and 4 ft discharge hose. Siphons downhill if source is higher than receptacle at 5 gallons / minute. Also acts as a positive displacement hand lift pump at 28 oz / stroke. Constructed of rigid & flexible PVC. Non-corrosive and non-rusting. Solvent welded for ?no-leak? construction. Valves and seals of Viton. Rigid PVC check valve.