940GS-04

Stainless Steel Non-Surge Check Valve (4 inches and Smaller)

  • Controls pipeline surges caused by flow reversal by slowly opening and closing at separate adjustable rates
  • Valve closes when downstream pressure is greater than upstream pressure
  • Valve opens when upstream pressure is greater than downstream pressure
  • Lightweight Stainless Steel construction reduces corrosion, diaphragm wear, and labor frequency and costs

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