This contractor grade Zoeller pro sewage check valve prevents back flow for efficient pump operation. 2 clamps and 1 boot are included.; ; Brand Name: Flint & Walling Sub Brand: Zoeller Inlet Diameter: 2 in. Connection Type: Slip Material: PVC Product Type: Check Valve Maximum Temperature: 75 �F Maximum Pressure: 90 psi Packaging Type: Bulk Mounting Orientation: Horizontal/Vertical Fits Pipe Size: 2 in.