Rheem vs Solahart vs Dux vs Rinnai: Hot Water Brands in WA

Look, when your hot water system finally gives up the ghost, picking a new one feels like a guessing game. You're standing there with cold water dripping and a dozen names you half recognise. Rheem, Solahart, Dux, Rinnai, Bosch, Vulcan—they all make gear that works. The real question is what's right for your place, your power setup, what you can spend. We put this comparison together to cut through the noise for homeowners around WA.

First, choose the type, then the brand

Sorting out the fuel type and system style should come before you even look at brand names, because honestly most makers focus on certain categories anyway. Your main choices are gas, electric, solar and heat pump, each with its own pros and cons. We cover the specifics in our guide on electric vs gas vs solar hot water, but here's the quick rundown:

• Continuous-flow gas heats water as it passes through, no tank needed, which gives you basically endless hot water if your house is on ATCO natural gas.

• Gas storage keeps a cylinder hot and ready to go. It's a pretty solid middle-of-the-road choice for a lot of homes.

• Electric storage is the cheapest thing to put in and really straightforward, though what you pay to run it hinges almost entirely on your electricity tariff.

• Solar uses collectors on your roof and can slash your running costs to almost nothing in a sunny place like Perth.

• Heat pump systems use electricity but they're incredibly efficient, pulling warmth right out of the air, and like solar they might get you some federal STC help with the cost.

The major brands compared

All of them have decent parts availability and service networks over here in WA, and that's a bigger deal than people think. A brand that someone can actually get parts for locally means your repair happens in days, not weeks.

Which brand suits which home?

You're on natural gas and want endless hot water

For this setup, continuous-flow gas is just the way to go. Rinnai and Bosch are the big names here, Rheem makes good ones too. Since these units heat water only when you turn the tap on, even a family with four teenagers won't run out. We handle everything through our gas hot water service, from picking the unit to getting it installed.

You want the lowest running costs and have roof space

Solar hot water is a classic Perth solution for a reason—our sunshine does the heavy lifting. Solahart and Rheem are the brands most people land on for solar. A heat pump is the other one to look at if you want low running costs but don't have the roof space or don't want collectors up there, because it draws heat from the surrounding air instead. Either of these options might qualify for federal STC support, which we explain in our solar and heat pump hot water section.

You want a simple, low-cost replacement

Going with an electric storage unit from Dux, Rheem or Vulcan is the most affordable path upfront and honestly it's about as simple as it gets. The catch is the ongoing electricity cost, which really depends on what tariff you're on. People with smaller households or rental properties often go this route because that low purchase price is what matters most at the time.

You want a reliable middle-ground all-rounder

Gas storage from Rheem or Dux gives you a tank of hot water always ready, and the running costs are usually lower than standard electric. For homes already on natural gas, it's a sensible default that suits a lot of families.

What actually matters more than the badge

Brand loyalty is fine but a few other things make a way bigger difference to how your system performs day to day:

• Correct sizing: Too small and you're always running out; too big and you've wasted money on something you don't need. Pick based on your household, not just the cheapest price tag.

• Right type for your energy setup: A brilliant gas unit does nothing for you if there's no gas connection at your place.

• Warranty and local support: Look at the cylinder warranty and the parts coverage, and make sure someone in your area actually services that brand.

• Quality installation: Even a top-quality unit will fail way too soon if it's put in badly. In WA, any hot water or gas work legally must be done by a licensed plumber (and a gas fitter if it's gas).

• Water quality: Perth's water is moderately hard, and that scale builds up inside storage tanks no matter whose name is on the outside, so regular servicing is non-negotiable.

What about running costs?

The sticker price is only half the story, maybe less. What a system costs to run over ten or fifteen years is what really hits your wallet, and that depends far more on the system type than on which brand you pick:

A cheap electric system can end up being the most expensive choice once you add up years of power bills, it happens more than people expect. That's why solar and heat pump setups, despite costing more at the start, make so much sense for households who plan to stay put. And the federal STC support for eligible systems helps close that upfront gap.

A quick word on warranties and servicing

Most decent brands back their cylinders with solid warranties, though the parts and labour cover is usually shorter. Regardless of what you go with, keeping up with servicing is the thing that actually protects your investment. Flushing out sediment, checking the sacrificial anode, testing the temperature and pressure relief valve—these jobs extend the life of your system, and skipping them is honestly one of the top reasons units pack it in years before they should. Have a chat with your plumber about what servicing schedule your chosen system needs so you get the full lifespan out of it.

The bottom line

There's no single winner for WA. Rinnai and Bosch are the go-to for continuous-flow gas, Solahart and Rheem own the solar space, and Dux, Rheem and Vulcan make reliable affordable storage. The right pick is the one that lines up with your energy connection, how many people are in your home, and what you can spend—installed properly by a licensed plumber. If you're going round in circles, a quick conversation about your specific house is worth more than any spec sheet. Check our hot water systems service for supply, install and repairs.

Not sure which system suits your home? Call our licensed Canning Vale plumbers for straight advice on the right brand and type for your household.

Frequently asked questions