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S518

Dual Chamber Control Valve - Full Port with Mechanical Check

  • Simplified and efficient design is easy and economical to maintain
  • Two-piece assembly opens and closes as commanded by the pilot control system
  • Mechanical check feature provides immediate check action when flow ceases
  • Stainless Steel construction offers superior corrosion resistance for longer life

Select a Model

Select options below to identify the UPC, Order Code, and Repair Kit for a specific S518

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