Manufacturer Name: Lochinvar & A.O. Smith Product Number: 100208661 OEM Part Number: 100208661 Product Description: Flow Switch W/3" Paddle Weight:1.44lbs/653.17g The Lochinvar & A.O. Smith 100208661 Flow switch with a 3” paddle ensures that water flows through your equipment in the right manner.y. This flow switch detects changes in water flow and turns the system on or off as... https://www.partshnc.com/kitswitchflow-w3-paddle-3