- Energy rating
- 4 star
- Suited to
- 3–5 people
- Pressure
- Full mains
- Control
- Adjustable
Thermann · Gas storage
Thermann 4★ 170L Gas Storage Hot Water System, Natural Gas
The Thermann gas storage hot water system is suited to families of three to five people, with an adjustable thermostat for safety and efficiency and full mains pressure.
A larger 170L tank for a busy household, with a small footprint that makes replacement straightforward and full mains pressure for strong flow across the house.
- 4 star efficiency
- Full mains pressure taps
- Small footprint — easy replacement
- Adjustable thermostat for safety and efficiency
- Includes a Pressure and Temperature Relief (PTR) valve
Why this unit
What makes this Thermann tank a good pick
The reasons are practical rather than marketing.
Supplied and installed by our own licensed plumbers and gasfitters.
Household
Sized for a family
At 170 litres it suits families of three to five, covering back-to-back showers in a busier home.
Control
Adjustable thermostat
An adjustable thermostat lets the delivery temperature be set for safety and efficiency.
Fit
Easy replacement
A small footprint makes it a straightforward like-for-like swap for an ageing gas tank.
Build your order
Add the Thermann 4★ 170L to your order
Pick the model and add any extras your property needs — professional installation is included on every system. The total updates as you go, and we confirm everything with you before any work is booked.
Detail
Specifications, delivery and care
The figures and terms below apply to this model. Open whichever section you need.
| SKU | 7485 |
|---|---|
| Type | Gas storage |
| Capacity | 170L |
| Energy rating | 4 star |
| Pressure | Full mains pressure |
| Control | Adjustable thermostat |
| Suited to | Families of 3–5 |
Delivery areas
We deliver hot water systems, parts and accessories across New South Wales and to selected areas throughout Australia. Availability can vary with your postcode and the size of the product, so contact us first if you are outside the standard delivery area.
Delivery timeframes
Estimates only, and they can be affected by courier delays, weather or other events outside our control.
- Sydney metro: 1 to 3 business days
- Regional NSW: 2 to 7 business days
- Interstate: 3 to 10 business days
Delivery charges
Shipping is calculated at checkout from your delivery location, the size and weight of the product, and any installation requirements. Some products and promotional offers include free delivery within selected metro areas.
Installation deliveries
Where installation is booked with your purchase, our team contacts you to arrange a date and time once the order is confirmed. Scheduling depends on technician availability and your location.
On arrival
Please inspect your order when it arrives. If it looks damaged, incomplete or incorrect, tell us within 48 hours and include photographs where you can.
Returns
We comply with the Australian Consumer Law. Nothing here limits your rights under the Competition and Consumer Act 2010 (Cth).
Change of mind returns may be accepted at our discretion when the request is made within 30 days of delivery, the product has not been installed or used, it remains unopened in its original packaging and it is in resalable condition. Return shipping for approved change of mind returns is generally the customer's responsibility. Special order and custom products cannot be returned for change of mind.
If a product is faulty, damaged or not as described, contact us as soon as you can. Depending on the circumstances we may repair it, replace it, provide a refund or arrange collection. If you receive the wrong product, contact us within 48 hours and we will arrange a replacement or collection at no extra cost where the error is ours.
How to request a return
Contact our team with your order details, explain the reason, send photographs if we ask for them, and wait for return instructions before sending anything back. Returns sent without prior approval may not be accepted. Approved refunds go back to the original payment method, usually within 5 to 10 business days of the return being received and inspected.
Full terms are on the shipping and return policy page.
A gas storage tank keeps a volume of water hot, so care is mostly about the valves and the anode that protect the tank.
- Lift the temperature-and-pressure relief (TPR) valve lever every six months to clear it, and check it reseats and stops dripping.
- Have the sacrificial anode checked within the warranty period — it is what protects the tank from corroding.
- Keep the area around the unit and its flue clear.
- Book a service if you notice longer recovery times, discoloured water, a drop in pressure or any smell of gas.
If something is not right, our phone line is attended 24 hours on 1300 096 668.
How it works
From first call to hot water back on
The same four steps apply whether you are replacing a failed unit or planning an upgrade.
Tell us what is happening
Call or order online with your suburb and the system you have now. Photos of the unit and its data plate help a great deal.
We scope and quote
We confirm the model, the installation and any extras the site needs, then come back to you before anything is booked.
We supply and install
We bring the unit, disconnect the old system, install and commission the new one, and check the valves are working as they should.
We clear the site
The old unit is taken away where you have asked us to, the work is tested in front of you, and you get the paperwork and warranty details.
Related products
Other systems we supply and install
These are the units we are asked about most often alongside it.
Common questions
Thermann 4★ 170L questions
Thermann gas storage cylinders carry a manufacturer's warranty — commonly up to 10 years on the cylinder, with shorter terms on parts and labour. We confirm the exact warranty for this model in writing before you order, and we handle any warranty claim for a system we installed.
Gas storage is sized by tank volume and first-hour delivery — how much hot water you get in the first hour of heavy use. A 130–135L tank suits smaller households; 160–170L and the larger first-hour units suit families of four to five. Tell us your household size and we will confirm the right size before you order.
We supply and install as one job. Installation is included on every system here, so one licensed team handles the unit, the fit-off and the removal of the old system. If you have your own plumber and want supply only, ask us and we will sort that out.
In most like-for-like swaps, yes. We confirm the footprint, the clearances and the flue when we scope the job so there are no surprises on the day.
Most gas storage units are installed externally. If the only practical position is indoors, we will confirm an internal model with the correct flue rather than fit an external unit inside.
A tempering valve is mandatory on storage type systems, so it applies here. The rest depend on the site: removal of the old unit, an isolation valve, a pressure limiting valve where mains pressure runs high, or additional pipework. We confirm the final list with you before any work is booked.
Ask about this system
Questions about this Thermann system?
Tell us about your household and what is there now, and we will confirm whether this size suits, what the installation involves and which extras you actually need before you order. If your hot water is out right now, calling is faster.
A straight answer on fit
We will say if a different system suits your property better, rather than selling you this one.
Phone attended 24 hours
Hot water emergencies do not keep business hours, so neither does the line.
Based at Lidcombe
93B John St, Lidcombe NSW 2141, servicing Sydney and Greater Sydney.
Thermann 4★ 170L Gas Storage Hot Water System, Natural Gas enquiry
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