3 Inch vs 4 Inch Submersible Pump: Which One Fits Your Borehole?

A 3 inch submersible pump fits boreholes as narrow as 3.5 inches in diameter, while a 4 inch submersible pump requires a minimum borehole diameter of approximately 4 inches—though the pump body itself typically measures around 3.85 inches. Choosing between the two depends on your borehole size, requ