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Instant Gas Hot Water Systems

Continuous hot water without a storage tank

An instant gas hot water system heats water as it passes through the unit rather than storing a set amount in a tank, so you're not limited to however much hot water a tank can hold. For a busy household all trying to shower in the same window before school and work, that's usually the biggest reason people switch. Getting the size right matters, so Andrew looks at how much hot water your household actually uses rather than guessing.

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Know the signs

Signs You Need a New Instant Gas Hot Water System

There are usually a few warning signs before an instant gas hot water system needs attention. Any one of these is worth getting checked before you're left with a cold shower and no warning.

01

No Hot Water, or the Pilot Won't Stay Lit

If the pilot light keeps going out, or you're getting no hot water at all, that's usually a sign the unit needs a proper look before it fails completely.

02

Water Temperature That Fluctuates

Hot water that swings between too hot and too cold, especially when more than one tap is running, often points to a unit that's struggling to keep up.

03

Rust or Discolouration Around the Unit

Rust streaks or discoloured water can point to corrosion inside the unit or its fittings, and it's worth getting checked before it turns into a bigger problem.

04

The Unit's Getting On

Instant gas systems don't last forever. If yours has been running for years without a service, it's worth having Andrew take a look before it lets you down.

Not Quite Ready for a New System?

If you're not sure whether it's time for a repair or a full replacement, Andrew can take a look and give you a straight answer either way.

Either Way, We Can Help
  • Why it happens

Why Perth Hills Households Choose Instant Gas

Instant gas heats water as it passes through rather than storing it in a tank, so there's no hot water sitting around losing heat when nobody's using it. That said, bottled LPG is the reality for a lot of Perth Hills properties rather than mains gas, and the ongoing cost of LPG can make instant gas one of the pricier ways to heat water, especially once demand ramps up. Because of that, we don't automatically recommend instant gas for a typical family home.

  • The repair

Where it makes a lot of sense is lower-demand situations, a granny flat, a small unit, holiday accommodation, or a household of one or two people with shorter showers. The compact size and continuous flow work well there without needing a bigger storage tank. We install and service instant gas systems from Rinnai and Bosch, and we'll size the unit to match how many people are actually using it. If you're leaning toward gas mostly because it's what you've always had, it's worth comparing against a modern electric storage system with app-based controls, particularly with solar PV, since that can end up being the more cost-effective option for a lot of Hills homes.

Why Call AH Plumbing & Gas

Local Expertise

We're not a national call centre. Andrew and the team live and work across the Perth Hills, so you're getting someone who actually knows the area.

Licensed & Insured

Gas Licence 13486. Fully licensed, insured and qualified for gas hot water work.

Upfront Pricing

You'll know the cost before any work starts. No surprises on the invoice.

Compare the Other Hot Water Systems

Not sure this is the right fit? Here’s how it stacks up against the other systems Andrew installs across the Hills:

  • Gas Storage hot water: a traditional storage system that keeps a tank of hot water ready to use.
  • Electric Storage hot water systems: a simple and reliable option that doesn’t require a gas connection. Add an app-based timer and solar PV, and you can make the most of your available solar power.
  • Heat pump hot water systems: highly energy efficient and generally cheaper to run, but with a higher upfront cost and more moving parts than a standard electric system. Andrew can talk you through whether the energy savings and long-term running costs make sense for your home.
  • Instant electric hot water systems: provides hot water without gas or a storage tank, and can be a practical option for smaller homes, kitchens, bathrooms or additions.

What the Perth Hills Locals Say

“Best. Shower. Ever. We had been without hot water since the storm, about a week, hideous. Andrew managed to secure the last hot water system model in the state for us, otherwise we would have had to wait much longer, so grateful. Andrew and his team were extremely professional, fast and the whole process was painless. Highly recommend Andrew, AH Plumbing & Gas Service.”

Alicia Watson · Perth Hills

“Andrew was an absolute star: communications were clear and friendly, and his service was prompt and outstanding quality. Not only did he fix the problem he was called out for quickly and at a reasonable price, he helpfully explained a few other things to us and solved some unrelated issues whilst he was here. Legend! Highly recommend.”

Peggy Illingworth · Perth Hills

“Always friendly, reliable, professional and gets the job done. Reasonable and honest prices for his services. Grateful we found Andrew and would highly recommend to anyone!”

Danika Rychter · Perth Hills

“Another life-saving episode with AH Plumbing & Gas, showed up on time/early and fixed the problem right away with great advice. Thanks so much.”

Julia · Perth Hills

“Andrew combines excellent communication and professional skills with very reasonable fees.”

Geraldine Box · Perth Hills

Frequently Asked Questions

How quickly can Andrew fit a new instant gas hot water system?

It depends on stock and what’s already on the calendar, but Andrew will give you a clear timeframe when he quotes the job.
Yes. Andrew installs and services both, though bottled LPG comes up often given how much of the Hills isn’t on mains gas.
Most instant gas units are rated for a good number of years, though how long yours lasts depends on water quality, usage and how well it’s been maintained. Andrew can give you a better sense of where your unit sits when he has a look.
Often, yes. Andrew will tell you plainly whether a repair makes sense or whether you’re better off replacing it, rather than pushing a new unit when a fix would do.
Rinnai and Bosch.
Cost depends on the system and what’s involved on the day, so Andrew will talk you through pricing before any work starts.
Not usually, particularly if you’re on bottled LPG. Instant gas tends to suit lower-demand spots better, like a granny flat or a small unit. For a typical family, we’ll often point you toward an electric storage system instead, especially if you’ve got solar PV. Andrew can talk you through what makes sense for your place.
Yes. Any gas fitting work Andrew does comes with a compliance certificate as standard.
Instant Gas Hot Water Systems

Instant Gas Hot Water Systems Across the Perth Hills

Whether an instant gas system makes sense often comes down to what's already connected at your place, mains gas or bottled LPG, and that varies from block to block rather than suburb to suburb. Either way, Andrew can fit and service the unit, he'll just confirm what you're working with when he has a look.

Need an Instant Gas Hot Water System Installed or Repaired?

Call Andrew 0402 780 719
Request a Callback
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