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303

Screwed End Silent Check Valves

  • 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/Certification Information

For product-specific approval information, please refer to the product’s specification sheet or ask a Watts representative. For general information regarding any approval certification partners identified in the specification sheet, please visit our certification partners’ websites:


ASSE CSA FM Approvals NSF
UL ULC USC WQA