The Direct Fill Link is smaller and less cumbersome to handle than traditional watering guns. Its ergonomic streamlined design makes it comfortable and easy to use. Unlike traditional watering guns, the handle is designed to completely halt the flow of water to the battery watering system when it is not being operated. There is no chance that the battery will continue to be filled if the user walks away while filling. The flow indicator is encased in PVC pipe making it extremely durable. The flow rate is fast enough for the largest batteries, yet gentle enough to fill accurately each and every time. The Direct Fill Link reduces water pressure to 10 PSI and will handle incoming pressure up to 90 PSI. Connect it to a standard garden hose, watch for the flow indicator to stop spinning, then disconnect it from the system.