Water heating systems
Hot water storage tanks
Nudge the lever of the temperature/pressure relief valve every 6–12 months to keep it moveable. With glass-lined water cylinders, ask a plumber to change the anode rod every 5 years. These rods help protect a water cylinder from corrosion – especially if the water is hard – and replacing them can extend the life of the cylinder.
Heat pump water heaters
Suppliers and installers typically recommend professional maintenance every two years to keep the system running efficiently.
Instantaneous (continuous flow) water heaters
Systems should be professionally serviced every two years.
Solar water heating systems
Collector panels should be inspected at least yearly for leaks, dirt or salt on the panels and shading from trees. Wash collectors if they are dirty and cut back any shading tree branches. Any broken elements, such as broken glass, should be repaired or replaced immediately. Systems that use a glycol mixture should have the solution checked and possibly replaced approximately every 5 years.