Epping, Eastwood, Denistone & Ryde
How much does a new hot water system cost in Sydney? With GT Plumbing, a like-for-like replacement starts from $1,265 for a 50L electric unit, $1,610 for a 250L electric, $1,595 for gas continuous flow, $1,955 for gas storage and $3,150 for a heat pump, supplied and installed, including GST and removal of your old unit. Call 0451 001 503, 24/7.
We keep an eye on what the big Sydney hot water retailers charge and set our prices below them, so you get a local, licensed plumber without paying more for it. Prices below are current for October 2026.
- Supplied and installed, including GST
- Old system removed and sent for recycling, not landfill
- Manufacturer warranty plus our 12-month workmanship guarantee
- Often installed the same day, depending on stock
- Licence 369979C · 211 five-star Google reviews
Hot water system prices
Electric storage
| System | Size | Supplied & installed |
|---|---|---|
| Rinnai Hotflo | 50L | $1,265 |
| Rheem | 50L | $1,325 |
| Rinnai Hotflo | 125L | $1,435 |
| Rinnai Hotflo | 160L | $1,520 |
| Rinnai Hotflo | 250L | $1,610 |
| Rheem | 250L | $1,900 |
| Rinnai Hotflo | 315L | $1,790 |
| Rheem | 315L | $2,040 |
| Rinnai Hotflo | 400L | $2,085 |
| Rheem | 400L | $2,630 |
Stainless steel electric (our recommendation)
| System | Size | Supplied & installed |
|---|---|---|
| Rheem Stainless Steel | 125L | $1,845 |
| Rheem Stainless Steel | 160L | $1,925 |
| Rheem Stainless Steel | 250L | $2,050 |
| Rheem Stainless Steel | 315L | $2,200 |
Gas storage
| System | Size | Supplied & installed |
|---|---|---|
| Rheem external | 135L | $1,955 |
| Rheem external | 170L | $2,135 |
| Rheem 5 Star | 265L | $2,130 |
| Rheem Stellar | 330L | $2,260 |
| Rheem Stellar | 360L | $2,330 |
| Rinnai Hotflo external | 135L | $2,350 |
| Rinnai Hotflo external | 170L | $2,450 |
Gas continuous flow (instantaneous)
| System | Size | Supplied & installed |
|---|---|---|
| Rinnai Infinity B16 | 16L | $1,595 |
| Rheem continuous flow | 26L | $1,605 |
| Rheem continuous flow | 12L, 16L or 20L | $1,625 |
| Rinnai Infinity B26 | 26L | $1,705 |
| Rinnai Infinity B20 | 20L | $1,805 |
Heat pump
| System | Supplied & installed |
|---|---|
| Rheem AmbiPower MDc-180 | $3,150 |
| Rheem AmbiPower 280e | $3,600 |
| Rheem Ambiheat HDc270 | $4,100 |
Prices are for like-for-like replacements and include GST and removal of the old system. Need a different brand or size? Call us for a price.
Compliance items that may be needed
Plumbing rules have tightened, and some installs need extra parts to meet the current standard. We only fit what your property actually needs, and we’ll tell you before we start.
| Item | Price (incl. GST) | When it’s needed |
|---|---|---|
| Tempering valve | $185 | Units not preset to 50°C that feed bathrooms or hand basins |
| Pressure limiting valve (PLV) | $110 | When mains pressure is too high for the new unit |
| Duo valve (15mm) | $90 | Isolation and non-return valve on the cold supply |
| Cold water expansion valve | $110 | In areas with high water pressure |
| Concrete base | $80 | When the unit needs a new level base |
| Safe tray and Mildred valve | $440 | Internal installs above a floor or ceiling |
| New power point (GPO) | from $220 | New gas continuous flow units, installed by our licensed electrician |
Why we recommend stainless steel
If you’re open to it, we suggest a stainless steel tank. There’s no glass-lined steel inside to rust over time, and many of our customers, especially families and people with sensitive skin, prefer it for water quality. It costs a little more up front, and we’re happy to talk you through whether it suits your home. Read more about water and sensitive skin.
Your old unit is recycled, not dumped
When we take out your old hot water system, it doesn’t go to landfill. The steel, copper and brass are sent for metal recycling, and we drain and handle the old unit safely on the way out.
What affects the final price
- Like-for-like or a change. Our prices are for swapping like for like. Changing from a storage tank to continuous flow, or from electric to gas, needs extra work and is quoted on site.
- Where it’s installed. Laundry, apartment and cupboard installs usually need an on-site quote.
- Compliance parts. Some homes need a tempering valve, PLV or other parts listed above.
- Access and parking. We need free parking close to the installation.
- Site check. Final prices are confirmed on site before any work starts. No surprises on the invoice.
Have a written quote from someone else?
Send it to us. We’ll meet or beat any genuine like-for-like written quote from a same-day hot water provider. Text a photo of your current system and the quote to 0451 001 503.
Common questions
How much does it cost to replace a hot water system in Sydney?
With GT Plumbing, a like-for-like replacement starts from $1,265 for a 50L electric unit and $1,610 for a 250L electric. Gas continuous flow starts from $1,595, gas storage from $1,955 and heat pumps from $3,150. Prices include supply, installation, GST and removal of the old unit.
What extra costs might apply?
Only parts your property needs to meet current rules, such as a tempering valve ($185), pressure limiting valve ($110), duo valve ($90) or expansion valve ($110). A new power point for gas continuous flow is from $220. We tell you before any work starts.
Can you replace my hot water system today?
Often, yes. Most common electric and gas units are available the same day. Call 0451 001 503 and we’ll confirm stock and timing.
Do you recommend stainless steel hot water tanks?
Yes, if it suits your budget. Stainless tanks have no glass-lined steel to rust, and many customers prefer them for water quality.
What happens to my old hot water system?
We remove it and send it for metal recycling, so it doesn’t end up in landfill.
What warranty do I get?
The full manufacturer warranty on the unit, plus our 12-month workmanship guarantee on the installation.
Do you price match?
We’ll meet or beat any genuine like-for-like written quote from a same-day hot water provider.
No hot water? Call GT Plumbing on 0451 001 503. We answer 24/7 across Ryde, Epping, Eastwood and the North Shore. See our hot water repairs and installation page or our full plumbing price list.