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Watts 0066606 ET-30-X Expansion Tank

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Price: $41.95
Item Number: 3612
Manufacturer Name: Watts
Manufacturer Part No: 66606
Watts 0066606 ET-30-X Expansion Tank
Watts 0066606 ET-30-X Non-Potable Water Expansion Tank
Pipe Mount and Free Standing

Series ETX, ETSX Non-Potable Water Expansion Tanks are for use in commercial and residential closed loop hydronic heating system piping to control the thermal expansion of hot water and maintain system pressure below the relief setting of the relief valve.

The pre-pressurized steel tank features a durable expansion membrane that prevents contact of the water with the air in the tank. This rugged diaphragm minimizes loss of the air change and ensures long and trouble-free life for the system.


Model ETX mounts to supply piping and Model ETSX is free standing.


Maximum Pressure:

  • 75psi (5.3 bar) for ETX
  • 100psi (6.9 bar) for ETSX

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