Round Water Tanks
Polymaster’s round water tank range is the most versatile above-ground poly storage solution available for Australian homes, rural properties, and industrial sites. Available from 200L to 50,000L across corrugated and smooth-wall profiles, our round tanks are manufactured from food-grade UV-stabilised polyethylene, certified to Australian Standards, and available in 17 Colourbond-style colours.
FEATURED ROUND WATER TANKS
Featured Products
POLYMASTER ROUND WATER TANK SOLUTIONS
Browse Our Full Range of Round Water Tanks
Polymaster’s round tank range covers corrugated rainwater tanks, smooth wall tanks, and industrial process tanks, all manufactured in one piece from UV-stabilised polyethylene with no joins, seams, or part lines.
With over 24 sizes to choose from and the ability to interconnect tanks for unlimited storage capacity, there is a Polymaster round tank for every property size and water storage requirement. Available through more than 1,600 agricultural and plumbing stores across Victoria, South Australia, New South Wales, and South East Queensland.
| Code | Product | Capacity | Diameter (mm) | Inlet Height (mm) | Outlet Size (mm) | ||
|---|---|---|---|---|---|---|---|
 | RWT200 | 200L Round Water Tank | 200L | 600 | 900 | 25 | Download Drawing |
 | RWT600 | 600L Round Water Tank | 600L | 1000 | 950 | 25 | Download Drawing |
 | RWT1000 | 1,000L Round Water Tank | 1,000L | 1000 | 1,500 | 25 | View Product Download Drawing |
 | RWT1600 | 1,600L Round Water Tank | 1,600L | 1250 | 1,500 | 25 | View Product Download Drawing |
 | PCR2000 | 2,000L Round Water Tank (Smooth) | 2,000L | 1175 | 2,185 | 25 | View Product Download Drawing |
 | RWT2270T | 2,700L Round Water Tank (Tall) | 2,270L | 1300 | 1,920 | 25 | Download Drawing |
 | RWT2270LP | 2,700L Round Water Tank (Low Profile) | 2,270L | 1700 | 1,200 | 25 | Download Drawing |
 | RWT3300 | 3,300L Round Water Tank | 3,300L | 1520 | 2,000 | 25 | View Product Download Drawing |
 | PCR4000 | 4,000L Round Water Tank (Smooth) | 4,000L | 1600 | 2,150 | 25 | Download Drawing |
 | RWT4500T | 4,500L Round Water Tank (Tall) | 4,500L | 1700 | 2,100 | 25 | Download Drawing |
 | RWT4500LP | 4,500L Round Water Tank (Low Profile) | 4,500L | 2150 | 1,380 | 25 | Download Drawing |
 | PCR5000 | 5,000L Round Water Tank (Smooth) | 5,000L | 1800 | 2,120 | 25 | View Product Download Drawing |
 | RWT5000 | 5,000L Round Water Tank | 5,000L | 1950 | 1,960 | 25 | View Product Download Drawing |
 | PCR7000 | 7,000L Round Water Tank (Smooth) | 7,000L | 2200 | 2,020 | 25 | Download Drawing |
 | RWT7100 | 7,100L Round Water Tank | 7,100L | 2150 | 2,120 | 40 | Download Drawing |
 | RWT9000 | 9,000L Round Water Tank | 9,000L | 2500 | 2,050 | 40 | View Product Download Drawing |
 | PCR10000 | 10,000L Round Water Tank (Smooth) | 10,000L | 2480 | 2,170 | 40 | View Product Download Drawing |
 | PCR13500 | 13,500L Round Water Tank (Smooth) | 13,500L | 2830 | 2,470 | 40 | Download Drawing |
 | RWT13600 | 13,600L Round Water Tank | 13,600L | 3100 | 2,100 | 40 | View Product Download Drawing |
 | PCR22500 | 22,500L Round Water Tank (Smooth) | 22,500L | 3573 | 2,559 | 40 | Download Drawing |
 | RWT22500 | 22,500L Round Water Tank | 22,500L | 3560 | 2,470 | 40 | View Product Download Drawing |
 | PCR27000 | 27,000L Round Water Tank (Smooth) | 27,000L | 3573 | 3,019 | 40 | Download Drawing |
 | RWT31700 | 31,700L Round Water Tank | 31,700L | 4100 | 2,610 | 40 | View Product Download Drawing |
 | RWT50KL | 50,000L Round Water Tank | 50,000L | 4600 | 3,290 | 40 | View Product Download Drawing |
200L Round Water Tank
RWT200
600L Round Water Tank
RWT600
1,000L Round Water Tank
RWT1000
1,600L Round Water Tank
RWT1600
2,000L Round Water Tank (Smooth)
PCR2000
2,700L Round Water Tank (Tall)
RWT2270T
2,700L Round Water Tank (Low Profile)
RWT2270LP
3,300L Round Water Tank
RWT3300
4,000L Round Water Tank (Smooth)
PCR4000
4,500L Round Water Tank (Tall)
RWT4500T
4,500L Round Water Tank (Low Profile)
RWT4500LP
5,000L Round Water Tank (Smooth)
PCR5000
5,000L Round Water Tank
RWT5000
7,000L Round Water Tank (Smooth)
PCR7000
7,100L Round Water Tank
RWT7100
9,000L Round Water Tank
RWT9000
10,000L Round Water Tank (Smooth)
PCR10000
13,500L Round Water Tank (Smooth)
PCR13500
13,600L Round Water Tank
RWT13600
22,500L Round Water Tank (Smooth)
PCR22500
22,500L Round Water Tank
RWT22500
27,000L Round Water Tank (Smooth)
PCR27000
31,700L Round Water Tank
RWT31700
50,000L Round Water Tank
RWT50KL
Not sure which tank is right for your property?
Our team can help you match the right size and profile to your water storage requirements. Call us on 1800 062 064 or use our instant quote tool.
ROUND WATER TANK APPLICATIONS
Which Round Water Tank Is Right for Your Property?
Polymaster’s round tank range covers more applications than any other single product line in our catalogue. Here is how to match the right tank to your situation.
Residential and Urban Properties
For homes with limited yard space but a need for reliable rainwater storage, the compact corrugated range from 200L to 3,300L delivers practical capacity without dominating the backyard.
The low-profile variants, RWT2270LP and RWT4500LP, are purpose-built for sites with height restrictions, such as under a deck or verandah.
For households looking to connect to internal plumbing for toilet flushing and laundry, tanks from 5,000L upward paired with a pump system give you the capacity for consistent household use.
Rural and Agricultural Properties
For farms, acreages, and rural properties where rainwater is the primary supply, tanks from 9,000L to 50,000L provide the storage needed to see through dry periods and extended periods between rainfall events.
Multiple tanks can be interconnected to increase total holding capacity without limit.
The 31,700L and 50,000L models are among the most popular choices for rural properties where water security is critical.
Builders and New Developments
The smooth wall range is a popular choice for builders and developers on new residential projects.
The clean, modern profile suits contemporary builds and is available in 17 Colourbond style colours for a considered finish.
The PCR10000 is a practical size for new residential developments where BASIX or council water storage requirements need to be met.
Highest Quality and Standards
Every Polymaster round water tank is independently certified, Australian-made, and built to perform reliably across residential, rural, and industrial applications.
Food Grade Polyethylene
Certified to AS/NZS 4020, the Australian standard for products in contact with drinking water.
ISO 9001 Quality Management
Polymaster holds ISO 9001 certification, the international standard for quality management systems.
Australian Made
Designed, engineered, and manufactured right here in Australia, built for our climate and our conditions.
Independently Certified
Certified to AS/NZS 4766:2006 for polyethylene storage tanks.
WHY CHOOSE POLYMASTER
Australian-Made Round Water Tanks Built to Last
Polymaster has been manufacturing round poly water tanks in Australia for over 30 years. Every tank in our range is manufactured in one piece, with no joins, no seams, no part lines, and we do not remove the top of the tank for transport. That one-piece construction is not just a design choice; it is the foundation of the tank’s structural integrity and long-term leak resistance.
Our round tanks are manufactured from food-grade, fully UV-stabilised polyethylene in all colours, certified to AS/NZS 4766:2020 and AS/NZS 4020, and backed by warranties of up to 20 years on the RWT corrugated range. With over 24 sizes from 200L to 50,000L and the ability to interconnect tanks for unlimited combined capacity, the Polymaster round range is the most complete above-ground water storage solution available for Australian properties.
FEATURE POINTS
Why Choose Polymaster Round Water Tanks
One-Piece Construction
No joins, seams, or part lines down the walls. Manufactured in a single piece for maximum structural strength, we never remove the top of the tank for transport.
Self-Supporting Roof Design
The certified patent and registered design self-supporting roof eliminates the need for a roof support pole, adding structural integrity and keeping the inside of the tank clean and accessible.
Double Strength UV+ Resin
Every tank is manufactured with double-strength UV+ resin for ultimate protection against the harsh Australian sun, fully UV-stabilised in all 17 Colourbond style colours.
Interconnectable for Unlimited Capacity
Every Polymaster round tank can be connected to other tanks to increase your total holding capacity without limit. A practical solution for rural properties, farms, and developments with high water demand.
MATCH YOUR TANK TO YOUR HOME
Colourbond Style Colours
A round water tank sits in your yard, beside your shed, or against your fence, so how it looks matters. Polymaster’s round tank range is available in 17 Colourbond style colours, giving you the flexibility to match your tank to your home’s exterior, roof, fencing, or cladding for a finish that suits the property rather than standing out from it.
Available across both the corrugated RWT range and the smooth wall PCR range, the colour options mean you are never locked into a standard green or beige finish. Whether you are installing a compact 200L tank beside a townhouse or a 50,000L Mega Tank on a rural property, there is a colour that works for your setting.
Available Colours
Available Colours
* Product May Vary Slightly. Polymaster will not be held liable for incorrect colour impressions, request your Polymaster colour sample to view colours. Polymaster tank colours represented match COLORBOND steel colours. *COLORBOND® and colour names are registered trademarks of Blue Scope Steel Ltd™.
DELIVERY AND DISTRIBUTION
Delivery Across Victoria, South Australia, New South Wales, and Queensland
Preparing Your Site
Truck and trailer clearance required is 19 metres long, 5 metres high, and 3.5 metres wide. Check for low branches or powerlines on your access route and ensure your gate and entrance can accommodate a 19m truck and trailer. A flat, clear area of at least 5 metres by 5 metres is required for unloading. Our logistics team will contact you approximately seven days before delivery to confirm your address and access requirements.
If your site is not quite ready, Polymaster can hold your order in storage for a fee. Contact us to arrange this.
ROUND TANKS IN THE FIELD
See Polymaster Round Water Tanks hard at work in the field.
WATER TANKS CASE STUDIES
Trusted by Australian Businesses to Deliver These Projects
Polymaster’s round water tanks are manufactured to the highest quality standards, independently certified, and trusted by homeowners, farmers, builders, and industrial operators across Australia.
Can't Find the Tank You Are Looking For?
Talk to our team. We will help you match the right round tank size, profile, and configuration to your property, water storage requirements, and budget.
MORE WATER TANK SOLUTIONS FROM POLYMASTER
Explore Our Full Range of Water Tank Solutions
Our round tank range is just one part of what Polymaster offers. If you need a slimline tank for a tight urban block, underground storage, or a retention and detention solution for your development, we have you covered.
Slimline Water Tanks
For narrow side yards, fence lines, and tight urban blocks, our slimline range delivers serious capacity without taking up serious space available from 600L to 5,000L in 17 Colourbond style colours.
View Range
Underground Water Tanks
For properties where above-ground storage is not an option, our underground range offers 3,300L and 5,000L capacity completely out of sight, with the smallest environmental footprint in the industry.
View Range
Retention and Detention Tanks
For civil, stormwater management, and OSD applications, Polymaster’s retention and detention tanks are configured to meet council and development specifications.
View Range
FAQs
Frequently Asked Questions
Everything you need to know about Polymaster’s round water tank range, from sizing and profiles through to installation and maintenance.
What sizes do Polymaster round water tanks come in?
Polymaster’s round tank range covers more than 24 sizes from 200L through to 50,000L, across corrugated rainwater tanks (RWT range) and smooth wall PolyChoice tanks (PCR range). Both profiles are available in a range of capacities to suit compact urban properties through to large rural and industrial sites. Multiple tanks can also be interconnected to increase your total holding capacity without limit.
What is the difference between the RWT corrugated and PCR smooth wall tanks?
The RWT corrugated range features the traditional corrugated wall profile that provides structural strength and a classic look suited to rural and residential properties. These tanks carry a 20-year warranty. The PCR PolyChoice smooth wall range has a clean, modern profile better suited to contemporary residential builds and urban settings where aesthetics matter. PCR tanks carry a 10-year warranty, with the exception of the PCR10000, which carries a 15-year warranty. Both ranges are manufactured from food-grade UV-stabilised polyethylene and certified to the same Australian Standards.
Can I link multiple round tanks together?
Yes. Every Polymaster round tank can be interconnected with other tanks to increase your total holding capacity. There is no practical limit to the number of tanks that can be linked, making this a popular solution for rural properties and farms where water security is critical and a single large tank may not be practical to deliver or install.
What round tank size do I need for my home?
For garden and outdoor use only, a tank in the 1,000L to 3,300L range is a practical starting point for most residential properties. For household use, including toilet flushing and laundry, look at 5,000L to 9,000L with a pump system. For properties where rainwater is the primary supply, or where you want to reduce mains water reliance significantly, 13,600L and above gives you the storage capacity to manage extended dry periods. Use Polymaster’s online water calculator for a more precise recommendation based on your roof catchment area and local rainfall.
Are Polymaster round tanks available in different colours?
Yes. Polymaster’s round tank range is available in 17 Colourbond style colours across both the corrugated RWT range and the smooth wall PCR range. This includes popular options such as Monument, Ironstone, Woodland Grey, Wilderness, Classic Cream, Paperbark, and more. Colours are matched to Colourbond steel colours. We recommend requesting a physical colour sample from your local distributor before ordering, as colours may vary slightly from screen representations. COLORBOND is a registered trademark of BlueScope Steel Ltd.
What warranty do Polymaster round tanks carry?
The RWT corrugated rainwater tank range carries a 20-year warranty. The PCR smooth wall PolyChoice range carries a 10-year warranty, with the exception of the PCR10000, which carries a 15-year warranty. All warranties apply when tanks are correctly installed in accordance with Polymaster’s installation guidelines.
What is the largest round water tank Polymaster makes?
The largest tank in Polymaster’s round range is the RWT50KL, a 50,000L corrugated rainwater tank with a 4,600mm diameter and 3,440mm overall height. Known as the Mega Tank, it is suited to large rural properties, farms, and commercial sites where maximum water storage capacity is required. It is manufactured in one piece with no joins, seams, or part lines, and carries a 20-year warranty.
Are round rainwater tanks and components weatherproof?
Yes. Polymaster round rainwater tanks are fully UV-stabilised and built to withstand harsh Australian weather conditions year-round. All fittings and components are selected specifically for their resistance to sun, heat, and general wear, so the tank keeps performing over the long term without constant upkeep.
Can I drink the water from my round water tank?
Polymaster’s round tanks are manufactured from food-grade, BPA-free polyethylene certified to AS/NZS 4020, the Australian Standard for materials in contact with drinking water. That said, Polymaster cannot guarantee the quality of the water once it’s harvested and stored, as this depends on your roof, gutters, and collection setup rather than the tank itself.
Is the smooth wall PolyChoice tank weaker than the corrugated RWT range?
No, this is a common misconception. Tank strength comes down to the thickness and grade of the polyethylene used, not whether the wall is corrugated or smooth. Both the RWT corrugated range and the PCR PolyChoice smooth wall range are engineered to the same structural standards. The difference between them is purely a matter of finish and aesthetic preference.
How much does a Polymaster round water tank weigh?
Tank weight varies depending on the size, the number of welded fittings, and the specific gravity of the liquid it’s designed to hold, heavier liquids need a heavier-walled tank. As a guide, Polymaster’s round water tanks are comparable in weight to equivalent fibreglass or galvanised steel tanks of the same capacity.