Siphons downhill if source is higher than receptacle @ 5 gallons/minute. Also acts as a positive displacement hand life pump @ 28 oz./stroke. Constructed of rigid & flexible PCV with a rigid PVC check valve. Non corrosive, non rusting. Solvent welded for "no leak" construction. Valves and seals of Viton™. Barrel - 38" L x 1-1/2" Dia.; hose 48" L x 1" O.D., .75" I.D. Be sure to remove pump from container when not in use to prevent unintentional siphon action or unauthorized use. 2" standard adapter.