BASED IN WHITIANGA & SERVICING THE COROMANDEL PENINSULA
Electric Hot Water Cylinders by Johno the Plumber in the Coromandel Peninsula
Electric Hot Water Cylinders (HWCs) are the most common method of hot water heating in New Zealand. At Johno the Plumber, we specialize in the installation, maintenance, and upgrade of electric hot water cylinders, ensuring you have a reliable and efficient hot water supply.
How Electric Hot Water Cylinders Work
Electric HWCs store hot water in a thermally insulated container until it is needed. The basic principles are:
- Storage: Hot water is stored in the cylinder and kept hot by an electric element.
- Density Difference: Hot water, being less dense than cold water, rises to the top of the cylinder where it is drawn off for use.
- Replacement: Cold water enters the cylinder at the bottom, replacing the hot water that is used.
Common Systems in New Zealand
In many older homes, we find the classic low-pressure open-vented HWCs. These systems use a Pressure Reduction Valve, often referred to as an "AJAX" valve, to set the incoming water pressure. The valve reduces the pressure to 3.7/7.6/12.2 meters of head. When these systems fail, it is usually the ideal time to upgrade to a mains pressure HWC or consider alternative fuel sources.
Maintenance and Upgrades
Electric HWCs are relatively maintenance-free, but occasional thermostat and element replacements are necessary. Over time, HWCs can split, leading to costly repairs depending on the location and system type. Regular upkeep of valves is crucial to ensure the system operates efficiently and safely.
Pressure Systems Explained:
- Low Pressure (Open-Vented Systems): Pressure provided by a cold water storage header tank (3-12 meters head, 30-120 kPa).
- Low Pressure (Pressure-Reducing Valve Systems): Pressure reduced below mains pressure (3-12 meters head, 30-120 kPa).
- Mains Pressure Systems: Working pressure equal to the incoming supply (120-1400 kPa, typically 350-700 kPa).
Why Upgrade to Mains Pressure?
Upgrading from a low-pressure system to a mains pressure HWC offers numerous benefits:
- Improved Water Pressure: Enhanced shower experience and better overall water flow.
- Increased Efficiency: Modern systems are more energy-efficient, reducing your power bills.
- Reliability: New systems are less prone to failures and require less maintenance.
Contact Johno the Plumber
If you are considering upgrading your hot water system or need advice on the best options available, contact Johno the Plumber. We provide expert consultation, installation, and maintenance services tailored to your needs. Let's discuss your queries and find the best solution for your home.
With Johno the Plumber covering all three trades he is the One Stop Coromandel Shop for all your Plumbing, Gasfitting, and Drainage needs.
One Phone Number, One quote, One Invoice and most importantly One person who knows all aspects of your job from start to finish.
Give Johno a call today............0800 NEED JOHNO
