Originally, oil pumps from the various manufactures like Alemite, Balcrank, Graco and Lincoln came as full-length pumps. Normally these pumps would fit either a 55 gallon drum or a typical 36″ tall oil tank. But as many more tanks started being built at various other sizes it became apparent that oil pumps could not come as one length fitting all situations.
So the various manufactures started producing what most of us in the industry call stub pumps. These stub pumps are now the industry standard and they require adding on an additional length of pipe to complete the pump set up. They are most often called down tubes but they are also referred to as suction tubes.
Normally made of black pipe or PVC their diameter depends on the bottom diameter of the receiving oil pump. The most popular down tube diameter sizes are: 3/4″ 1″, 1 1/4″, 1 1/2″
Downtube length will vary depending on the container that the pump is going into.
The downtube is threaded on one end and that is the end that will be screwed into the lower portion of the oil pump. The other end should be cut at a slight angle so it can easily suck up the oil within the tank.
You can make these down tubes yourself or you can purchase them from Wiley Equipment Company. Just simply give us a call and tell us the height of the container the pump will go into. And what oil pump you wish to buy and we can make the proper length for you.
Give us a call. 1-800-490-5389