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91

Cast Iron or Cast Aluminum Bronze Compact Wafer Silent Check Valves

Series 91 Cast Iron or Cast Aluminum Bronze Compact Wafer Silent Check Valves are designed for liquids and gases where flow reversal can cause surge and water hammer.

Features

  • Compact, lightweight wafer design saves space
  • Disc is fully guided at top and bottom to ensure alignment and sealing at any installation angle
  • Sizes: 2 to 6 in. (50 to 150mm)
  • Disc begins to open at 0.5 psi (34.5 kPa), and opens 1/3 inch per inch of line size for enhanced flow

Select a Model

Select options below to identify the UPC, Order Code, and Repair Kit for a specific 91

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