Using a Pump with Rain Barrels: Pressure and Volume Limits

To run a sprinkler from rain barrels, you need a pump delivering at least 30 psi—typically a $200+ direct-drive model with a pressure switch. Two 55-gallon barrels hold only 110 gallons, enough for about 160 sq ft at 1 inch of water. They'll empty in minutes. For larger areas, add more barrels and use drip irrigation or soaker hoses with a lower-pressure pump.

Rain barrels are best for hand-watering or drip systems. Sprinklers demand more pressure and volume than barrels can practically supply.