Reliable Material: Our water flow sensor is in a league of its own. Crafted from high - grade brass, this sensor is a paragon of durability and reliability. Brass, renowned for its corrosion - resistant properties, can withstand the test of time and the harsh environment of water systems. You can have complete peace of mind, knowing that it won't succumb to wear and tear easily. Replace Part Number: Our water flow sensor replacement part numbers are 2022107584, 2GWH-24 Fit for: Fits for Girard Tankless Water Heater GSWH-2 Easy Installation: All you need to do is unscrew the screw, and you can successfully remove the old water flow sensor. Then, replacing it with our new sensor is just as easy. The straightforward installation process saves you time and money, allowing you to get your water heater back up and running in no time. So, whether you're a seasoned DIYer or just starting out, our water flow sensor makes the replacement process a simple and stress - free experience. Package Included: 1 Water Flow Sensor