About Pumping Capacities
Capacities are approximate and based on the mill operating in winds as shown below. The short stroke increases pumping elevation one-third and reduces pumping capacities one-fourth.
In 12 MPH winds, capacity is reduced about 20%; in 10 MPH winds, about 38%. If prevailing winds are low, use of a cylinder smaller than shown will permit your mill to operate in lower winds.
Never use pipe smaller than the size specified for the cylinder. For deep wells, use ball valve or Marcy cylinders with ash rod, other type of floating pump rod or fiberglass rod.