Hot Water Systems Sydney

If your hot water stops suddenly, leaks, or the tank bursts, turn off the system at the power or gas supply, then shut off the water valve if it is safe to do so. Once that’s done, call us at 02 9199 7430, and our team will guide you on what to do next while a licensed plumber is on the way.

Acting fast reduces damage, prevents electrical hazards, and helps us restore your hot water sooner.

This usually happens when the thermostat, tempering valve, or mixing valve is failing, causing the system to lose control over temperature regulation. In older units, mineral buildup inside the tank can also interfere with consistent heating. Continuous flow systems may show this behaviour if the burner isn’t igniting properly or if water flow rates fluctuate.

It’s a safety-related issue and a common sign that the system needs servicing or a component replacement. If you need help, our licensed plumber can test each part, identify the exact cause, and restore stable, safe temperatures.

Most systems need replacing when they become unreliable, leak, take too long to heat, or can no longer hold temperature. If your unit is over 10 years old, repairs often become less cost-effective than installing a new system.

A quick assessment from our plumbers will tell you whether repair or replacement is the better option.

For guidance, call us at 02 9199 7430.

These noises often come from sediment buildup inside the tank. As the water heats, trapped sediment moves and hardens, creating banging or rumbling sounds. In older systems, expanding metal components or a failing heating element can also produce similar noises.

A noisy hot water system is usually a sign that the tank needs flushing or that internal parts are wearing out. We highly recommend addressing it early to help prevent further damage and extend the system’s lifespan.

Turn off the water supply to the system, then call us immediately at 02 9199 7430. Even a small leak can escalate quickly, cause water damage, or indicate that the tank is beginning to fail. Minor leaks may come from valves or fittings, while water pooling around the base often means internal corrosion.

Our expert Sydney can inspect the system, repair the fault where possible, or recommend a safe same-day replacement if the tank has reached the end of its life.

This usually happens when the system can’t maintain stable pressure or flow. Older continuous flow units may shut off if the water flow drops below the activation threshold. For tank systems, failing valves, ageing pipework, or pressure imbalances can cause temperature changes whenever another tap is used.

It’s a common issue in older Sydney homes and apartments.

Our plumber can test the system to identify whether the cause is flow-related, valve-related, or due to a failing unit.

Yes. Graham & Sons Plumbing handles hot water repairs and replacements for strata buildings, rental properties, cafés, restaurants, hotels, schools, and commercial sites across Sydney.

You get clear communication, proper reporting, upfront quotes, and reliable repairs carried out safely and professionally.

We work directly with property managers, landlords, and building managers to resolve issues quickly so residents and businesses aren’t left without hot water.

A system usually needs replacing when it becomes unreliable or shows signs of wear that repairs can’t resolve. Most units last around 8–12 years, and once they reach this stage, breakdowns become more common.

You may need a replacement if you notice:

• Leaks or water pooling around the tank
• Inconsistent or rapidly changing temperatures
• Slow heat-up times or frequent loss of hot water
• Rusty, discoloured, or metallic-tasting water
• Loud banging, rumbling, or unusual noises
• Repeated repairs within a short period
• A system that is more than 10 years old

Graham & Sons Plumbing has inspected and replaced hundreds of hot water systems across Sydney, and our expert recommendation is straightforward: if your unit is ageing, inefficient, or failing repeatedly, upgrading early prevents sudden breakdowns and reduces long-term running costs.

Our plumbers can assess your system and give you honest guidance on the best path forward.

Yes. Same-day replacement is one of our core advantages. If your system has failed, is leaking, or is no longer safe to use, our plumbers can supply and install a new unit on the spot in most Sydney suburbs.

We carry common system types and sizes in our vehicles or source them quickly through trusted suppliers, allowing us to complete the job without delay. You get a safe, compliant installation and reliable hot water restored as soon as possible.

The best system depends on your household size, energy usage, available space, and long-term running cost goals. Each option has strengths, and the right choice varies from home to home. Here’s a simple breakdown:

• Gas: Great for families who need consistent hot water and quick recovery times. Works well for medium to large households with gas access.
• Electric: Reliable and affordable upfront. A practical option for smaller homes or apartments where installation space is limited.
• Heat Pump: Designed to reduce running costs. Works efficiently in Sydney’s climate when positioned correctly. Ideal for homes wanting lower bills without installing solar panels.
• Solar: Strong long-term savings for homes with good roof space and sunlight exposure. Not suitable for shaded properties or roofs with limited access.

We have installed every type of system across Sydney, and our honest recommendation is simple: the right choice comes down to performance, running cost, and practicality for your property.

We assess your home, water habits, and budget to guide you toward the most suitable option, not the most expensive one.

Yes. Modern heat pumps perform well in Sydney’s winter conditions. They are designed to operate efficiently in temperatures far lower than what Sydney experiences, and most units maintain steady performance even on cold mornings.

Heat pumps do make some sound, similar to a small outdoor air-conditioning unit, but a properly installed system should not be disruptive. Most noise issues occur when the unit is placed too close to walls, bedrooms, or narrow spaces where sound can echo.

Correct positioning makes the biggest difference. During installation, we assess airflow, clearance, and surrounding structures to minimise noise and ensure the system runs smoothly.

Many Sydney homeowners are surprised at how quiet modern heat pumps are once they’re installed in the right location.

The right size depends on how many people live in your home and how much hot water is used during peak times. Choosing the wrong size often leads to cold showers, high energy bills, or a system working far harder than it should.

Here is a simple guide most Sydney households can follow:

• 1–2 people: 50 to 125 litre system
• 3–4 people: 160 to 250 litre system
• 5–6 people: 250 to 315 litre system

Bigger households or high hot-water use: 315 litres or continuous flow gas

Our team of experts can assess your shower habits, appliance use, and household routines before recommending a size. Our goal is to match you with a system that delivers consistent hot water without unnecessary running costs.

High hot water bills usually point to an efficiency issue, a failing component, or a system that no longer suits your household size. Common causes include:

• An ageing system that uses far more energy to heat the same amount of water.
• Sediment build-up in the tank, forcing the system to work harder.
• Faulty thermostats or elements are causing overheating or constant reheating.
• A system that’s too small, leading to frequent recovery cycles.
• Heat pumps or solar systems installed incorrectly reduce their efficiency.
• Leaking valves or connections, losing hot water without you realising.

If you need help, we can run a quick efficiency check to pinpoint the cause and recommend practical fixes that lower your running costs, not just temporary solutions.

Most standard hot water installations in Sydney are completed within 2 to 3 hours. The exact time depends on whether we are installing a brand-new system or replacing an old one.

We arrive fully prepared, so the process is smooth, safe, and efficient. In most cases, your hot water is restored the same day with minimal disruption to your home.

No. We do not charge a call-out fee. You only pay for the work once you approve the quote.

This keeps the process fair and avoids the “$200 just to knock on the door” frustration many Sydney homeowners experience.

Most Sydney homeowners expect to pay nothing or very little for a call-out. That’s why we keep it simple and charge $0.

You only pay for approved work after we assess the issue.

It depends on the work required, but you’ll always receive a clear, fixed quote before anything begins. We discuss the price with you upfront, offer options to suit different budgets, and never add hidden fees later. Every job has a fixed rate once we confirm the issue.

Yes. For many jobs, we can provide an estimated range over the phone. If the issue needs proper inspection first, we send a plumber at no call-out cost and explain your options onsite.

You approve the quote only when you’re comfortable.

Some companies use high call-out fees or pressure tactics to inflate small jobs. We, at Graham & Sons Plumbing, avoid that completely, and we charge fair, fixed prices and explain the cost before work starts, so small jobs stay small.

Yes. The price you approve is the price you pay. We do not change the cost midway or surprise you at the end. If anything unexpected appears during the job, we stop, show you the issue, and discuss your options first. You stay in control the whole time, and nothing moves forward without your approval.

Always. You can ask questions, compare options, or take your time deciding. There is no push to “book now” and no awkward sales approach.

Our role is simply to give you clear information so you can choose what feels right. Many Sydney customers tell us this is one of the reasons they feel comfortable calling us.

You can pay by credit card (Visa, Mastercard, AMEX) or other convenient methods. Invoices include full details of the work, pricing, and warranty information.

Yes. We treat your home with the same care we would treat our own. Our plumbers clean the work area, remove any waste, and leave the space tidy before they go. You won’t be left sweeping, mopping, or dealing with mess. The job isn’t considered finished until everything is clean, safe, and ready for normal use.

Yes. Our company and all our plumbers hold the correct licences to carry out plumbing, drainage, and gas work in NSW. We continuously train our team so every repair meets current regulations and industry standards.

Always. Every job complies with Australian Standards and the Plumbing Code of Australia.

We are also members of the Master Plumbers Association, which reflects our commitment to quality and professional conduct.

Yes. All work we complete comes with a warranty. The warranty length depends on the type of job, and we note it clearly on your invoice.

Our plumbers are fully certified and follow the Plumbing Code of Australia, as well as all technical and safety standards for any plumbing work. We are also members of the Master Plumbers Association, which reflects our commitment to professional, high-quality service.

If something doesn’t seem right after the job is done, you can call us anytime. We stand behind our work, and we’re here to fix any issue covered under your warranty.

No. All work is carried out by our own licensed in-house plumbers. Many Sydney residents worry about subcontractors turning up with different standards, different pricing, or no accountability. With us, you get one consistent team, clear communication, and the same high level of workmanship every time.

You always know who is coming to your home, how the job will be handled, and that it is backed by our warranty and service standards. No surprises, no mixed crews, no uncertainty.

Yes. We operate every day of the week, including weekends and all public holidays. Plumbing problems don’t wait, and we never want you feeling stuck because it happens outside “business hours”. When you call, our team treats it as a priority, and we make sure help is on the way as quickly as possible.

You get real support from people who understand how stressful these moments can be, and we stay available so you are never left dealing with an emergency on your own.

You can call us anytime at 02 9199 7430. We operate 24/7 for plumbing emergencies and urgent repairs across Sydney.

Whether it is late at night, early morning, or during a holiday, you will always reach a real Sydney plumber who can respond quickly and guide you through what to do until we arrive. Your safety and peace of mind come first, no matter the time.

In most areas of Sydney, we can arrive the same day, often within the hour, for urgent issues. Once you call, we prioritise your job and update you with accurate arrival times.

Yes. Our plumbers arrive in full uniform, so you know exactly who is at your door. It reflects the level of professionalism we hold ourselves to. You can expect a clean appearance, respectful communication, and a team that treats your home with care from the moment they walk in.

Yes. You can call us anytime at 02 9199 7430, and our team will give you clear, honest guidance so you understand your options before booking. No pressure, no rushed answers, just straightforward help from licensed Sydney plumbers who want to make things easier for you.