2-1/2" to 4" Second Check Backflow Repair Kit for 757 and 757DCDA

This second check repair kit provides all the parts necessary to repair or replace the second check on a 2 1/2 to 4 inch double check valve assembly backflow preventer, model 757, and double check detector assembly backflow preventer, model 757DCDA. This kit consist of a first check module, check module O-ring, and red silicone disc elastomer.

Features

• Factory replacement kit
• No special tools required for servicing
• All parts are made of high quality materials
• Serviceable in the field