Shallow Well Sprinkler System: Pressure Tank Benefits

Evaluating Pressure Tank Addition for Direct-Drive Pump

A Flotec 1 HP pump on a shallow well feeds a 4-zone sprinkler system without a pressure tank. Sprinkler heads don't perform to potential despite good pump output.

Pressure Tank Analysis

A pressure tank provides consistent pressure and reduces pump cycling, but does not increase total flow capacity. If the pump's maximum GPM is insufficient for the zone demand, a tank won't fix poor head performance.

First, Verify These Basics

• All mainline valves fully open
• No leaks in mainline or zone piping
• Zone GPM demand vs. pump capacity at 30-40 PSI

When a Tank Helps

If the pump can meet peak demand but pressure fluctuates during zone transitions or due to well recovery variations, a properly sized tank (20-30 gallon drawdown) with a 30/50 PSI switch will stabilize pressure and protect the pump from rapid cycling.