How Much Does a New Hot Water System Cost in the Adelaide Hills in 2026?
A new hot water system in the Adelaide Hills in 2026 sits anywhere from $1,400 for a basic electric storage swap-out to $5,500+ for a top-tier heat pump install with rebates. Here's exactly what drives the number and what a fair quote looks like.
Adelaide Hills hot water system price ranges in 2026
| System type | Supply & install |
|---|---|
| Electric storage (160–315L) | $1,400 – $2,400 |
| Gas storage (135–170L) | $1,800 – $2,900 |
| Continuous flow gas (Rinnai / Rheem) | $2,100 – $3,400 |
| Heat pump (with STC rebate) | $3,500 – $5,500 |
| Solar with gas boost | $4,200 – $6,800 |
These ranges assume a like-for-like replacement of an existing system. Add $200–$800 for relocation, slab cutting, gas line extension, frost protection or upgraded tempering valves.
What should be included in a fair quote
- Removal and recycling of the old unit
- Supply of the new unit and tempering valve
- Pressure and temperature relief drain line to compliant termination
- Gas compliance certificate (gas systems)
- Plumbing compliance certificate
- Manufacturer warranty registration
Which system suits your household?
- Heat pump — lowest running cost, big STC rebate, quiet
- Continuous flow gas — never runs out, compact, mid-range
- Solar with gas boost — best long-term ROI if roof aspect suits
- Electric storage — cheapest upfront, simplest install
- Heat pump — slower recovery, needs ventilated location, can struggle in cold Hills mornings
- Continuous flow — needs adequate gas line size
- Solar — high upfront, dependent on roof aspect
- Electric storage — highest running cost on flat tariff
"If your existing system is older than 8 years and starting to leak, replace it. A failed unit at midnight costs the same as a planned replacement — plus the water damage."
— Sam, Topline Plumbing & Gas
FAQ
Can you install same-day if mine has failed?+
Usually yes — we stock common Rheem, Rinnai, Bosch and Dux units in the van for callouts across the Adelaide Hills.
Do you handle the rebate paperwork?+
For heat pumps and solar, yes — we register STCs and the rebate is deducted from your quote upfront.
Gas or heat pump — which is cheaper to run?+
Heat pumps win on running cost by 30–50% for an average household, but break-even on capital cost takes 3–5 years. In the cooler Hills climate, factor in slower morning recovery.
Need a real Adelaide Hills plumber on the job?
Licensed plumbers & gas fitters. Call Sam direct or request a written quote.
