Skip to Main Content


Screwed End Silent Check Valves

Series 303 Screwed End Silent Check Valves are designed to prevent surge, backflow, and water hammer in liquid service. These check valves are available in cast iron, bronze, or stainless steel; pressure and temperature conditions will dictate the appropriate body material. For air and gas applications, consult factory.


  • Spring closes disc before flow reversal, preventing surge and water hammer
  • Disc begins to open at 0.5 psi (34.5 kPa), and opens 1/4 inch per inch of line size
  • Disc is center guided to ensure alignment in both fully open and fully closed positions
  • Choice of body material, depending on pressure and temperature conditions

Select a Model

Select options below to identify the UPC, Order Code, and Repair Kit for a specific 303

Approval Information

For approval information, please refer to the products specification sheet. For any other information on product certification and documentation information, please visit our certification partner websites: