Continuous Flow
Continuous Flow Hot Water in Adelaide
Continuous flow gas units heat water on demand - no tank, no standby losses, endless hot water. We match you with three CBS-licensed plumbers (gas-fitter registered).
When you need a continuous flow plumber
Continuous flow gas units are the modern Adelaide favourite for households on the gas network. No tank, no standby heat losses, endless hot water on demand. Premium efficiency, premium price, premium reliability.
Signs you need this service
- Existing tank is too small for household demand.
- Want to reclaim laundry or external storage space.
- Replacing an old gas tank and want to upgrade efficiency.
- Need 6-star energy efficiency for a renovation or new build.
What a matched plumber does
- Wall-mount install with new flue where needed.
- Brand options: Rinnai Infinity, Bosch Highflow, Rheem Stellar.
- Sizing matched to peak demand (kitchen + shower + laundry simultaneously).
- Certificate of Compliance via the Office of the Technical Regulator.
Continuous Flow - indicative cost
Indicative$2,400 – $3,800
Typical Adelaide job: $3,000
Indicative range drawn from real Adelaide jobs. Your 3 matched plumbers quote the exact fixed price before any work starts.
See all Adelaide cost guidesHow the matching works
1. Tell us the job
One short form, about two minutes. Add photos if you have them.
2. Get 3 local matches
CBS-licensed independent plumbers who cover your Adelaide suburb.
3. Compare and choose
Three itemised quotes, side by side. No obligation, no fee to you.
What to know about continuous flow in Adelaide
Continuous flow units heat water only when a hot tap is opened. There's no tank, no constant reheating, no standby losses. For an average Adelaide household, that's $80 to $130 a year saved compared to a gas storage tank.
Sizing matters. The unit rating (typically 16, 20, 26, or 32 litres per minute) needs to match your peak simultaneous demand. A 26 LPM unit handles two showers and a sink. A 20 LPM unit suits a smaller household. Network plumbers always size correctly - undersized continuous flow units are a common complaint in older installs.
Every continuous flow install requires a Certificate of Compliance via the Office of the Technical Regulator and a tempering valve at the bathroom outlet (max 50°C). Network plumbers always include both.
South Australian regulation
Continuous flow gas units require Gas Fitter registration, a Certificate of Compliance via OTR, and a compliant tempering valve at the bathroom outlet per AS 3498.
Continuous Flow in Adelaide - questions
Like-for-like replacement of an existing gas tank: $2,400 to $3,200. New install requiring gas line and flue work: $3,000 to $3,800. Includes Certificate of Compliance and tempering valve.
Continuous flow is generally 15-30% more efficient than a gas tank because there are no standby losses. Annual running cost for an average household: tank $400-$550, continuous flow $300-$420. Heat pump is still cheaper to run, but more expensive upfront.
Possibly - continuous flow units draw gas at higher peak rates than tanks. Older 1/2 inch supply lines may need upgrade to 3/4 inch. Network plumbers always check the existing gas supply before quoting.
No - that's the whole point. As long as the unit is correctly sized for peak simultaneous demand (e.g. two showers + dishwasher), hot water is endless. Undersized units can struggle in mid-winter mornings - your plumber will size correctly.
It runs on gas, so it's independent of your solar PV. Some households pair continuous flow gas with PV for the rest of the house. Heat pump is the better match if you want PV to power your hot water.
Related plumbing services
Compare 3 free quotes for continuous flow in Adelaide
Tell us the job once. We match you with 3 independent local plumbers within 24 hours. No call centres, no obligation, no nasty surprises.
Every plumber CBS-licensed under the SA PGE Act 1995