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Specialty Products For Hydronic Systems

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ETV-1 : Expansion Tank Service Valve

The ETV-1 expansion tank service valve simplifies the process of filling, isolating, draining, and servicing a hydronic expansion tank.


  • Features and Benefit

  • Forged brass ball valves with blow-out proof stem
  • 1⁄2” Multi-function 3-way valve enables the contractor to:

– Isolate and drain the expansion tank

– Isolate and drain the closed-loop system

– Fill the closed-loop system

  • 1⁄2” MNPT x FNPT x GHT connections
  • Replaces multiple components and reduces installation time