16 FEATURES
a supplementary CoC is necessary. This includes all previously mentioned tests, along with all of the safety tests conducted at the distribution board. Additionally, if any modifications are made to the electrical circuit, thermostat or element, and the geyser was not previously protected by an earth leakage, it is essential to install a new earth leakage or rewire the geyser circuit to include earth leakage protection. Obtaining this certification is vital to ensure that your geyser meets all the relevant safety and performance standards.
Understanding these electrical requirements will not only help in maintaining efficiency and safety in your home’ s plumbing but will also ensure compliance with local regulations, giving you peace of mind.
With technical input from ECASA, IOPSA, Ariston and ISS Western Cape PA
Image supplied by Kwikot
Geyser coming off assembly line.
• Insulation Resistance: Ensure that insulation resistance is not less than 1MΩ between the live conductors and the earth conductor to verify no damage to the conductors occurred during installation.
• Earth and Bonding: Properly earth and bond hot and coldwater pipes to maintain a resistance not exceeding 0.2Ω, keeping electrical potential at zero volts across exposed conductive parts.
• Earth Continuity Resistance: Ensure that the earth continuity resistance to the geyser terminals aligns with Table 8.1 in SANS 10142-1, ensuring proper earthing and effective circuit breaker operation.
• Voltage Tests: After circuit activation, measure the no-load voltage at the geyser terminals and calculate the full-load voltage to confirm that voltage drop does not exceed 5 % at the consumption point.
Certification of Compliance( CoC) If your geyser is part of a new installation, it should be covered by the initial CoC. If you need to replace the geyser or any of its components, such as the element, thermostat or switch disconnector in an existing installation, The anatomy of a geyser.
What to do for geyser maintenance:
• Inspect and replace the anode if required
• Inspect the T & P valve for signs of corrosion or damage and replace if required, depending on the type of valve; test the functionality by opening the knob or lever
• Inspect the inside of the tank and remove and flush sediment build up
• Inspect the flange, pipes and fittings for any signs of leaks and tighten or replace if required
• Check the thermostat and heating elements to ensure they are working properly
" A water heater should be inspected and maintained at least once a year to ensure optimal performance and longevity."
Image supplied by Ariston www. plumbingafrica. co. za @ plumbingonline @ plumbingonline @ PlumbingAfricaOnline July 2025 Volume 31 I Number 05