Rydalmere, NSW 2116 — Servicing all Sydney suburbs
Mon–Fri 7am–5pm · Sat 7am–12pm info@southernstarplumbing.com.au
Hot water · Repair, replace, upgrade

Hot water repairs & installation across Sydney.

Electric, gas, heat pump or solar — we repair, replace and upgrade hot water systems for Sydney homes and businesses, with honest advice on what actually makes sense for your household.

Priority bookings All brands serviced Heat pump experts

HomeServices › Hot water systems

Repair before replace

Unlike installers who only quote new units, we’ll fix what’s fixable. Thermostats, elements, anode rods, TPR valves, pilot assemblies — often a $300 repair beats a $3,000 swap.

All brands, all fuels

Rheem, Rinnai, Dux, Bosch, Aquamax, Sanden, Reclaim, Vulcan, Thermann — we carry parts for the systems Sydney homes actually run.

Honest sizing advice

Too small = cold showers. Too big = wasted energy bills for 10 years. We size the system to your real household usage, not a brochure.

Hot water unit options

The Sydney hot water system options, in plain English

Most Sydney homes are weighing up four real choices: keep your existing gas or electric system running longer with a repair, swap like-for-like, move to a modern heat pump, or go full solar. There’s no single right answer — it depends on your gas connection, roof, household size, and what the system will be doing for the next 10–15 years.

  • Gas instantaneous — continuous flow, never runs out, great for bigger families with natural gas
  • Gas storage — cheaper to buy, simpler to replace like-for-like
  • Electric storage — the classic 50L/250L/315L tank — cheapest to install, dearest to run
  • Heat pump — ~4× the efficiency of electric storage; federal and NSW rebates still in play
  • Solar hot water — best running cost, highest upfront, best for sunny north-facing roofs
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Plumber diagnosing hot water unit

When a repair is smart — and when it isn’t

A system under 8 years old with a failed thermostat, element, TPR valve or gas valve is almost always worth repairing. A system older than 12 years with a rusted tank, or any unit leaking from the base, is telling you to budget for replacement — a patch will rust through again within months and can flood a cupboard while you’re at work.

  • Under warranty — always repair and claim the part (we’ll handle the paperwork)
  • Tank leaking from the base = replace, no debate
  • Pilot won’t stay lit = usually a $180–$380 thermocouple
  • No hot water at all + 15+ years old = price a replacement
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<24hr
Typical turnaround for storage unit swap
Rebate
Heat pump & solar rebates claimed on your behalf
10 yr
Warranty on most new installs we fit
All of
Sydney — from Rydalmere to the Shire
FAQs

Common questions about hot water systems

If you can’t see your question here, call us — we’re happy to talk it through.

My hot water just stopped — is it urgent?
Not usually unsafe, but we’ll treat it as a priority booking and do our best to fit you in quickly. Before you call, check: is the pilot light out (gas)? Has the circuit breaker tripped (electric)? Is water leaking from the base of the tank? The answers change what parts we load on the van and whether we need to turn off water to the unit in the meantime.
How long does a replacement take?
A like-for-like storage swap is typically 2–4 hours on-site. An instantaneous-to-instantaneous swap, similar. Moving from gas storage to heat pump, or upgrading the pipework, is half a day to a full day depending on location and electrical work needed.
Do you claim the rebates for me?
Yes — for heat pump and solar installs we do the STC paperwork and discount it from your invoice so you see the savings upfront rather than chasing them later.
What’s the best brand?
We recommend based on your setup, not sponsorship. Rinnai and Rheem lead on gas reliability; Sanden and Reclaim are the most respected heat pumps; Dux and Rheem electric tanks are the workhorses. We’ll steer you to the right one for your house.
Can you install one I buy online?
Yes, but please talk to us first — cheap units from overseas often don’t have Australian compliance certificates and can’t legally be connected. We’ll save you a bad purchase.
Do you do commercial and strata?
Regularly — restaurants, cafes, aged-care, offices and strata buildings. Scheduled maintenance plans available.
Further reading

From our blog

Ready for a straight answer on your hot water systems job?

Call us on 0432 304 609 or send through a quick note — we service every suburb of Sydney from our Rydalmere base.