DetailsGallonage Meter - 100 - 1,800 Gallon Auto Shut Off - Variable setting up to 1,800 gallons. Once the setting is reached the valve closes and won't allow more water to flow. Great way to let you know when your filters have reached their maximum life and they are due to be changed. Comes with 1/4" Jaco Tube connectors. #WM-2000-W Easy installation and use.