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M300NA

Stainless Steel Double Check Detector Assemblies with Bi-Link Check Valves for High Flow Fire Systems

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

Select a Model

Select options below to identify the UPC, Order Code, and Repair Kit for a specific M300NA

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