77F-CSI

Steel, Flanged, Wye-Pattern Strainers

  • Cast steel body and flanged connections for durability and long life
  • Machined seat allows self-aligning screen to help ensure a perfect fit
  • Cast steel retainer cap with PTFE gasket and blow-down connection for greater reliability
  • Install in horizontal or vertical pipe with the blow-off connection at the lower end of the screen retainer cover

Select options below to identify the UPC, Order Code, and Repair Kit for a specific 77F-CSI

Approval/Certification Information

For product-specific approval information, please refer to the product’s specification sheet (see literature section above) 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