Harwil - Model Q-1 - In-line Flow Switch - Manual

The gasket seal located between the main body casting and the lid casting is a cork-rubber composition which is subject to a slight creep for a short period after application of initial clamping load. All gaskets are properly clamped before shipment; however, during shipping and storage, the gasket may compress, allowing the body-lid clamp bolts to become slightly loose. Tighten these bolts before assembling the flow switch in your system.