Looking for the best hot water system in Perth? Heat pump and gas instantaneous units are top picks, offering efficiency and long-term savings. At Marchant Plumbing and Gas, we help you choose the right system for your home or business with no pushy upsells, just honest advice and expert installation tailored to your usage and budget.
Best Hot Water System for Perth Homes
Choosing the right hot water system for Perth’s climate means balancing efficiency, household needs, and your home’s layout. With plenty of sun year-round, a solar plus heat pump combo is ideal for long-term energy savings and a reduced carbon footprint. Gas instantaneous systems, on the other hand, are perfect for homes with high hot water demand, offering fast, reliable supply. If you already have solar PV panels, a heat pump system will reduce energy draw even further. But what’s the best system if your home has space or installation limitations? The answer depends on factors like roof space for solar or ventilation for gas. At Marchant Plumbing and Gas, we take all of this into account. We assess your property, usage, and preferences to recommend the most efficient, cost-effective solution tailored specifically to your lifestyle and Perth’s unique conditions. Trust our local expertise to get your hot water system right the first time.
Heat Pump vs Gas Hot Water Systems
Deciding between a heat pump and a gas system starts with understanding how each performs in Perth homes. Heat pumps have a higher upfront cost but offer significantly lower running costs, especially when combined with solar. They’re also quieter and environmentally friendlier. Gas systems are cheaper to install, reliable in all weather, and provide instant hot water, though they can lead to higher long-term gas bills. Do heat pumps work well during Perth’s colder mornings? Yes, they may slow down slightly but still perform efficiently overall. Consider your household size, available rebates, and energy compatibility when choosing. If you’re still weighing your options, our in-depth guide on heat pump vs gas hot water in Perthbreaks down everything you need to make the right decision. If you want simplicity and immediacy, gas may suit you. If long-term savings and sustainability matter more, heat pumps are the smarter pick.
What Size Hot Water System Do I Need?
Sizing your hot water system correctly ensures comfort and efficiency. As a rule, 30–50 liters per person per day is standard for storage systems. Small homes (1–2 people) typically need 90–130L storage or 16L/min instant systems. Medium-sized homes (3–4 people) should consider 160–250L or 20–24L/min options. Larger households (5 or more) need 300L+ storage or 26L/min instant flow systems. What if you have high appliance usage? Always account for dishwashers, laundry, and baths in your estimate. Choosing the wrong size can lead to either cold showers or higher bills. We assess your home’s layout and usage to recommend the perfect fit.
Hot Water System Installation Cost in WA
Understanding installation costs helps you plan smarter. In Perth, gas instantaneous systems cost approximately $1,800–$2,500 fully installed. Heat pumps range from $2,500–$3,500, especially after applying eligible rebates. Solar systems cost the most, from $3,500–$5,000+, depending on your roof size and tank needs. What extra costs should you expect? These might include switchboard upgrades, valve replacements, or old unit disposal. The good news is, WA government rebates and Small-scale Technology Certificates (STCs) can shave hundreds off your upfront costs. To make sure you claim everything you’re eligible for, read our guide on how to claim government hot water rebates in WA. For a detailed pricing breakdown, see what it really costs to replace a hot water system in Perth so you can budget accurately. We’ll provide a transparent quote and help you apply for every available incentive.
Repair vs Replacement: What’s Better?
Choosing between repair or replacement depends on your system’s condition. If your unit is less than 8 years old, with no rust or major leaks, a repair is often the smarter move. However, if the tank is leaking, the heating element fails repeatedly, or parts are no longer available, replacement is the better option. If you’re unsure which direction to take, read our guide on signs your hot water system needs replacement or just a repair for more clarity. Wondering if it’s worth upgrading to a newer model? More efficient systems, like heat pumps, often lead to long-term savings. Some come with 5–10 year warranties, adding peace of mind. Before making a decision, always have a licensed plumber assess if a simple part replacement like an anode rod or valve could extend your system’s life.
Why Perth Homeowners Trust Marchant Plumbing and Gas for Hot Water Solutions
When it comes to hot water systems in Perth, Marchant Plumbing and Gas is the trusted choice for honest advice, expert installations, and genuine local knowledge. Whether you’re upgrading to a heat pump, switching from gas, or need urgent repairs, our licensed team is relied on across Kallaroo, Roleystone, and Victoria Park. We customise every solution based on your home, budget, and hot water needs. With transparent pricing, fast response times, and quality workmanship, you can count on Marchant Plumbing and Gas to deliver reliable, efficient hot water every time.
Ready to upgrade or repair your hot water system? Call us today or visit us on Google Maps in Kallaroo, Roleystone, or Victoria Park to get started with expert help near you.
Frequently Asked Questions
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Why are hot water system quotes so different between companies?
Some plumbers include hidden fees or upsell units. We offer fixed-price quotes with clear inclusions — no surprises.
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Are heat pump hot water systems really worth it in Perth’s climate?
Yes — heat pumps work efficiently in Perth’s mild climate, especially when paired with solar. They use up to 70% less energy than traditional systems.
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What size hot water system do I need?
It depends on your household size and usage. We’ll assess your needs to avoid under-sizing (running out of hot water) or overpaying for capacity you don’t need.
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Can I just repair my hot water system instead of replacing it?
Sometimes, yes. We never push a full replacement unless it's necessary. If a part can be safely repaired or replaced, we’ll let you know upfront.
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How long does installation take, and will I be without hot water?
In most cases, we can replace your system the same day. You won’t be left without hot water overnight unless major upgrades are required.
Tired Of Unclear Quotes And Pushy Upsells?
At Marchant Plumbing and Gas, we keep it real:
✔️ Honest advice on whether you actually need a new unit
✔️ Fixed-price quotes — no hidden extras
✔️ Heat pump and instant system experts — tailored to Perth homes
✔️ Fast, same-day replacements in most cases
🔧 Call us today for free assessment — get hot water without the guesswork.
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