TERA PUMP BPA Free (TM) TRDRUM20 Emergency Drinking Water Drum Siphon Pump Food quality Drinking Water Safe Siphon Pump Quick siphon Drains up to 1 pint per 3 strokes Delivery , Volume : About 21 liter / Min Total Length: 45.7" , Suction tube Length: 33.6" , Discharge Tube Length: 46.4" Suction tube and Discharge Tube Inner Dia: .79" Designed for quick and easy emptying of <span class="a-text-bold"><span class="a-text-italic">15, 30, and 55 gallon drums</span></span> Includes a standard <span class="a-text-bold"><span class="a-text-italic">2 inch NPS bung adapter.</span></span> Siphon to a lower level or pumps to higher level. <span class="a-text-bold"><span class="a-text-italic">(uses gravity to siphon)</span></span> Siphoning is controlled by <span class="a-text-bold"><span class="a-text-italic">air vent </span>on top<span class="a-text-italic"> (increase or decrease siphoning speed by adjusting air vent)</span></span> <span class="a-text-bold"><span class="a-text-italic">Suction tube </span></span>can be cut at an angle to lay flat against the bottom for easier transferring. Inserct suction tube into suply container and screw down threaqded <span class="a-text-bold"><span class="a-text-italic">bung adapter</span></span>. Position <span class="a-text-bold"><span class="a-text-italic">discharge hose</span></span> into receiveing container <span class="a-text-italic">(ex. Drum Barrel)<span class="a-text-bold">For siphoning, be sure level of supply continaer is higher than theat of receiving container. (Siphon uses gravity to work)</span></span> <span class="a-text-bold"><span class="a-text-italic">Grasp top handle and pump up and down.</span></span>When discharge hose is completely full, you may cease pumping to allow siphoning action. Siphoning will slow down and then cease as supply lowers and reciever rises. <span class="a-text-bold"><span class="a-text-italic">To stop the flow at nay time, unscrew cap on the top of the handle counterclockwise. </span></span>When finished, close cap before next use.