M300

Stainless Steel Double Check Detector Assembly Backflow Preventers with Tri-Link Check Valves for High Flow Fire Systems

  • Can be installed under continuous pressure service to protect against backpressure and backsiphonage
  • Extremely compact design is significantly lighter than traditional designs
  • Patented tri-link check provides low pressure loss
  • Entire valve body and closure sleeve manufactured from 304 stainless steel

Select options below to identify the UPC, Order Code, and Repair Kit for a specific M300

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