Let’s face it, there are few things more sacred than a hot shower on a freezing winter morning. Your hot water system quietly plays a massive role in keeping your household running smoothly, from warm baths to clean dishes and laundry. Without it, well, let’s not go there. Instead, let’s discuss how when it’s time to replace or upgrade it, you want the job done right.
Perhaps you’re switching systems, or upgrading and replacing an old unit. Either way, you might want to know what to expect during the professional installation process. How do licensed installers handle everything from preparation and safety checks to system testing and handover? We’ll answer this and more, so you can feel confident and informed every step of the way.
First up is the initial site inspection, and it’s more important than most people realise. Before anything gets installed, a licensed plumber will visit your property to assess your current set-up. Where they determine the best location for your hot water system is may differ from where your current one is installed. Furthermore, they will check for compliance with plumbing and electrical standards, as well as identify any potential installation challenges.
Additionally, while you may have already made a decision, a hot water system installer can discuss your preferences and needs. You have four types when choosing a hot water system:
Your plumber will help you weigh up the pros and cons of each, taking into account your household size, energy usage, budget, and property layout. For example, it might turn out you have an ideal property for a ground-mounted solar hot water system set-up.
Once you’ve decided on which type of system you want and installation day rolls around, the first thing your installer will do is shut off your water supply (if you’re switching from or to a gas or electric system, the power or gas too). This is crucial for safety as it ensures there’s no risk of leaks, shocks, or other hazards while the work is being carried out.
Expect a short interruption to your services during this installation, but discuss with your installer a good time to minimise disruption to your day.
With everything safely shut off, it’s time to say goodbye to the old and in with the new. Your installer will start by draining any remaining water from the tank, then carefully disconnect the system from its plumbing and power or gas connections. Safety precautions should be taken here to prevent any gas leaks if gas heaters are disconnected from the main gas line connection.
On the subject of safety, as older units can be heavy, corroded, or still under pressure, removal needs to be done with care. Once removed, the old system is either taken away for disposal or recycled, if possible.
(Tip: Ask your installer if they offer eco-friendly disposal or recycling options—many do!)
With the old unit out of the way, the installer prepares the area for the new hot water system. This can mean adjusting pipework, modifying the base or supports, or upgrading valves and fittings to meet current plumbing standards.
If you’re switching to a different type of system—let’s say from electric to gas, or to a heat pump, there may be additional set-up required, such as venting and/or electrical work. Rest assured, a good installer will ensure everything is compliant, safe, and ready for the new unit.
With the site prepped, it’s time to install the new unit. Your professional plumber will position and secure the system in its designated spot. They will ensure proper clearance and accessibility for future servicing and maintenance.
Once in place, they will connect it to your energy source. This could be gas for modern gas water heaters, electricity for electric heaters, or a heat pump set-up. Next, they carefully fit the pipework. Finally, your plumber will install a pressure relief valve to ensure safe operation under varying water temperatures and pressure levels.
Once everything is connected, your installer should thoroughly check for leaks and verify that all fittings, joints, and valves are secure. The system needs flushing to clear any debris and ensure clean operation. Then, it’s time to make sure everything is in working order. This starts with water pressure testing to check consistent flow.
Finally, the power or gas supply is turned on, and the thermostat is set to a desired temperature (usually around 60°C for storage systems). This confirms proper operation of your new hot water system, and is safe and ready to warm up your next hot shower.
With everything up and running, your installer completes any final compliance checks, issues the necessary certification for local regulations, and registers your warranty. They should also tidy up the site, including removing old parts, packaging, and tools. Everything should be left neat and ready to go. Before leaving, they’ll walk you through how to operate and maintain your hot water system.
On the subject of maintenance, it’s worth knowing that a little upkeep can go a long way in extending the life of your new hot water system. Make time for regular checks, including:
This helps spot issues early before they become costly problems. One of the best things you can do for your hot water system’s efficiency and longevity is to schedule routine servicing every couple of years with a licensed plumber.
Installing a hot water system may seem straightforward, until you factor in all the details: you need to adhere to local building codes, the correct handling of gas or electricity sources, and warranty protection. Licensed professionals bring expert knowledge, ensuring every connection, valve, and orientation is done safely and legally.
Moreover, some systems such as tankless, solar hot water, or heat pumps, require specialised installation techniques. This could be precise venting, optimal collector placement, or careful integration with existing plumbing and solar infrastructure. DIY is not advised here as a mistake here could shorten your system’s lifespan or void expensive warranties.
By hiring a professional, you ensure your system performs efficiently, operates safely, and maintains full warranty coverage. Most importantly, they provide you with that priceless peace of mind.
Same Day Hot Water Service offers expert, friendly advice, professional set-up, and guaranteed quality. We give you the confidence that your hot water system (and hot showers) run reliably for years to come.
Most hot water system installations take between 2 to 4 hours, depending on the system type and site conditions. For example, the electric water heater installation process can take longer if a licensed electrician is needed.
Yes, someone over 18 should be present to provide access and approve the final set-up of your hot water system.
Yes, switching to electric models from gas systems is possible but may require electrical connections or upgrades or gas disconnection by a licensed professional for your new electric water heater installation.
In many cases, yes—especially if you book with Same Day Hot Water Service. Our professional technicians provide an optimal performance the same day no matter the installation complexity.