The Stacked Deep Well Pump System Inline – Top Deep Well Pump System has an outlet through which the water from the electric submersible pump exits the well. This connection must have a shut-off valve attached prior to connecting to the water line that goes to the home or other destination. Bison Pumps offers this valve in sizes to match your installation requirement. Our standard version is for 1 1/4” NPT pipe. If yours is a different size let your Bison representative know and they’ll get you a quote for the proper size.