Connection: 1 1/2 female threaded fitting (to be connected to male threaded pipe or hose connector at the bottom of the pump). Base diameter: 6.3 inch. Base contains 0.2 x 0.5 inch holes for mounting bolts. Size: 26 x 9 x 9 inch. Top diameter: 6.3 inch.
Suitable for most cast iron hand pumps with 0.2 x 0.5 inch mounting holes at the bottom.