4000SS

Stainless Steel Reduced Pressure Zone Assembly Backflow Preventers

  • Short end-to-end dimensions make retrofit easy
  • Stainless steel construction for maximum strength and corrosion resistance
  • Stainless steel relief valve features balanced rolling diaphragm to reduce maintenance costs and eliminate sliding seats
  • Cam-check assembly provides low head loss

Select options below to identify the UPC, Order Code, and Repair Kit for a specific 4000SS

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