Thermann G-Series 26L natural gas hot water, installed like-for-like in Sydney
Fixed installed price for a planned like-for-like replacement: Thermann G-Series 26L, natural gas, installed outside, in the same position. This is the price our online tool shows for this setup.
Enter your postcode to confirm we cover your area. Then choose this option, add your details and pay the deposit through Stripe. The deposit comes off your final invoice in full. Nothing is charged until you choose to pay the deposit.
Five stars, wherever Sydney leaves reviews.
Why All Day for a new hot water system
Plain prices, a licensed plumber at the door and a real person on the phone, day and night.
Thermann manufacturer warranty: 12-year heat-exchanger parts warranty; 3-year parts and labour warranty; eligible domestic installations; manufacturer conditions apply. Your rights under Australian Consumer Law apply as well.
What the price covers
This price suits you if
- You have a natural gas continuous flow hot water system now.
- It is installed outside, against an outside wall in the open air.
- The new unit goes in the same position (like-for-like).
- It is a planned replacement in our Sydney service area.
- We'll confirm the exact version from your photos after booking. Your price stays the same.
If your setup is different (a different gas type, model, size or position), use the tool for your own price or call us on 1300 301 354.
What's included
- Supply and install a new Thermann G-Series 26L (natural gas, continuous flow) in the same position.
- Suitable existing gas isolation valve reused, only if it checks out on site.
- Suitable existing cold-water isolation valve reused, only if it checks out on site.
- Suitable existing gas and water connections reused, only if it checks out on site.
- Installation by a licensed plumber (LIC: 339748C), with $20 million public liability cover.
- Lifetime All Day Workmanship Guarantee on our installation work.
- Thermann manufacturer warranty: 12-year heat-exchanger parts warranty; 3-year parts and labour warranty; eligible domestic installations; manufacturer conditions apply. Your rights under Australian Consumer Law apply as well.
Not included
- Before we order, a licensed plumber confirms your existing gas supply suits this heater's input. A major upstream gas-line upgrade is not included in this price, and if one is needed we price it with you before any extra work starts.
- Moving the unit to a new position, or anything a licensed plumber finds on site that is different from what you told us. We explain it and you approve it before any extra work goes ahead.
What our hot water customers say
“Johnny from All Day Plumbing did a great job replacing our old hot water system. He arrived on time, explained everything clearly and had the new unit installed quickly. The workmanship was excellent and everything was left clean and tidy. Highly recommend Johnny.”
“I had two amazing plumbers named Deniz and William fix my hot water system with zero hiccups. Would highly recommend these two and the entire company. They were efficient, affordable and just all round good people that take pride in their work. Any water related problems, these are the people to go to.”
“Would like to say a big thank you to Jacob, incredible service and work. Did an amazing job recommending a hot water heater for my home and replacing it perfectly!”
How booking works
- 1Tap "Check my postcode and book" and enter your postcode. No name or phone number needed yet.
- 2See your installed options and choose this one.
- 3Add your details and pay the deposit securely through Stripe.
- 4We call you to arrange the installation time (within 20 minutes during the hours above).
- 5The balance is paid after installation.
Deposit refunds: refundable in full if we can't do the job, if the scope or price changes and you'd rather not go ahead, or if you change your mind before we start. We'll also refund your deposit if we can't honour an agreed installation time. The deposit doesn't reserve an installation date or time.
CHECK MY POSTCODE AND BOOKSydney metro, from our base in Seven Hills
We install across the Sydney metro area from our base in Seven Hills. Online booking covers 247 postcodes: most of 2000 to 2234, plus 2250, 2555 to 2571 (Macarthur) and 2745 to 2783 (Penrith and the Blue Mountains). The price is the same in every postcode we cover.
If the tool doesn't cover your postcode, it says so and we check it with you, with no automatic travel charge. Or call us on 1300 301 354.
Common questions
How much does it cost to replace a Thermann G-Series 26L natural gas hot water system in Sydney?
With All Day Plumbing, a like-for-like outdoor replacement is $2,131.21 including GST, installed (price checked 12 November 2026).
Does the price change with my postcode?
No. It is the same anywhere in our service area. Your postcode only confirms we cover you.
Is the price fixed?
Yes, for a standard replacement in the same position. A licensed plumber confirms the details on site before any work starts, and any change needs your approval.
How does the deposit work?
You pay a deposit online through Stripe when you book. It comes off your final invoice in full.
