This gallonage meter is used to automatically shut off incoming water based on the amount of filtered water.Features: Up to 3,800 gallon capacity Settings in 100 gallon incrementsAccuracy +/- 10%Operating Pressure: 15 to 125 psiBurst tested to 500 psi1/4" Jaco tube connectionsManufactured with NSF listed materials**Picture is representative and may vary slightly from the actual product