A cold water expansion valve looks very similar to a pressure relief valve with either a small lever or ring-pull.
However, unlike a pressure relief valve which is installed directly on the storage tank near the top, a cold water expansion valve is located on the cold pipe on the inlet side of the tank. It acts as a backup to expel water and excess heat and pressure from the tank if the primary pressure relief valve fails to work.
Many hot water systems in Canberra do not have a cold water expansion valve installed as Canberra has very soft water without a lot of minerals present.
Areas with hard water such as Adelaide are required to have cold water expansion valves installed as their mineral-rich water can degrade the internal mechanism of a temperature and pressure relief valve (and other valves) quite quickly.
What do I do if my cold water expansion valve or expansion control valve is dripping?
If you have a cold water expansion valve on your hot water system, check to make sure it’s not dripping. If it is, we recommend calling a plumber to have a closer look and check your pressure and temperature relief valve too.
How 6 Star Hot Water & Plumbing can fix your leaking cold water expansion valve in Canberra
Cold water expansion valves are not necessary in the ACT and Queanbeyan region, and signs of dripping from the valve could indicate other problems with your hot water system.
Call a professional plumber in Canberra and Queanbeyan today on 0448 844 911 for expert hot water advice
Hot water system cold water expansion valves we replace:
Note expansion valves are not typically required by the manufacturer or regulators in Canberra or its surrounding regions.
- AAE – solar – expansion valve
- Apricus – solar – expansion valve
- Aquamax – gas, solar and electric
- Beasley – solar and electric – expansion valve
- Chromagen – solar and heat pump – expansion valve
- Conergy – solar and heat pump – expansion valve
- Dux – electric, gas, Sunpro solar and heat pumps – expansion valve
- Edwards – solar – expansion valve
- Everhot – electric and gas – expansion valve
- EvoHeat – heat pumps – expansion valve
- Hills – solar – expansion valve
- iStore – heat pumps – expansion valve
- Kelvinator – solar – expansion valve
- Quantum – heat pumps– expansion valve
- Reclaim – heat pump – expansion valve
- Rheem – electric, gas, solar and heat pump– expansion valve
- Rinnai- electric, gas, solar and heat pump– expansion valve
- Solahart – solar – expansion valve
- SolarArk – solar – expansion valve
- Stiebel Eltron – electric and solar – expansion valve
- Thermann- electric, gas, solar and heat pump – expansion valve
- Vulcan- electric and gas – expansion valve
Call us on 0448844911
for leaking cold water expansion valve and expansion control valve replacements
and hot water system advice in Canberra and Queanbeyan.