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AS

Cast Iron Air Separators

  • Separates air from water in hydronic heating piping systems
  • Continuously purges and vents air in the system when installed with Watts Model ET expansion tank and Model FV4 float-vent
  • Cast iron body construction
  • 1/2 in. female threaded connection for an expansion tank and a 1/8 in. female threaded connection for a float vent

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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