Apex Cold Water Expansion Valve 120kPa Low Pressure - EVT12.2

Model: EVT12.2

Apex Cold Water Expansion Valve 120kPa Low Pressure - EVT12.2

Low, medium and high (mains) pressure hot water systems.  
Use with FV12.2

Low Pressure Cold Water Expansion Valve video  


  • Complies with NZ Building Code G12 (2001)
  • Complies with NZS 4607:1989
  • Manufactured to NZS 4608:1992
  • Energy saving valve - relieves cold water rather than hot, saving electricity
  • Flushing lever/handle to clear foreign matter from valve seat - can also be used as cylinder drain.
  • Silicone rubber washers and non-corrosive valve seat materials mean long life - no heat loop required.
  • Failsafe against cylinder over pressure
  • Special factory settings between 75 and 750 kPa available on request
  • N.Z. forged, high quality, corrosion resistant DR brass body
  • Machined, assembled and 100% tested in N.Z.


  • Refer to Technical Area for installation guide.
  • If 1.0 meter minimum head can't be achieved between EVT and RV then use EVT under-bench model (See VP75U/VP120U)
  • Do NOT apply heat near valve during installation.
  • Pressure limiting valve or pressure reducing valve must be fitted.

Thermal Expansion:
Under normal conditions, a 180 litre hot water cylinder when heated from cold to 65°C will expel 3.6 litres (12.6 meters of 20mm copper pipe) of water due to thermal expansion. The amount of expansion will vary depending on the volume of hot water used and cylinder capacity.
Cold Water Expansion Valve Metric


  • Non-return (mains pressure only): To prevent cross-connection of hot water to cold water supply.
  • Cap: Should second take off not be required.
Apex Cold Water Expansion Valve - EVT7.6
  • Inlet/Outlet/Takeoff: 20mm, 3/4" BSP (male) 
  • Drain: 15mm, 1/2" BSP (male)
  • Length: EVT Low Pressure: 62mm
    EVT High Pressure: 70mm 
  • Standard pressure settings
    • 75 kPa [11psi]
    • 120 kPa [17psi]
    • 500 kPa [72psi]
    • 700 kPa [100psi]
  • Pressure settings between 75 and 700 kPa [11 and 100psi] may be factory set for special applications.
  • Maximum temperature: 99˚C.
  • Minimum temperature: 1˚C.
  • Kilowatt rating: 20kw
Apex Catalogue

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