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™.
RWT5000
5,000L Round Water Tank
This round 5,000L rainwater tank is designed to hold a maximum volume of water for the minimum footprint, allowing you to water your lawn and garden, and top up the pool. This certified rainwater tank is manufactured with strength in mind.
Invest with confidence that this Polymaster 5,000 Litre Water tank is fit for purpose and will stand the test of time. A favourite with homeowners, this corrugated round water tank is manufactured to the highest of Australian Standards.
Australian standards are put in place to give households peace of mind when it comes to a tank’s usability.
- Maximum capacity, minimal footprint — 5,000L in a compact tank, ideal for tight yards or smaller properties.
- One-piece build with a self-supporting roof — no joins or seams to sag over time.
- Built for Australian conditions — UV+ double-strength resin resists fading and cracking in the sun.
Get in touch
Need the right tank solution fast? Speak with a Polymaster expert today
Dimensions
Capacity:
5,000L (1,100 gallons)
Inlet Height:
1,960mm
Diameter:
1,950mm
Overall Height:
2,170mm
All measurements listed are approximate only
Standard Fit Out
Strainer Position:
12 o’clock
Overflow Position:
11 o'clock
Outlet size:
40mm (Brass)
Outlet Position:
6 o’clock
Strainer Size:
400mm
Ball Valve:
40mm
Guides & Specifications
Installation Manual
Water Tank Category Brochure
When you invest in a rainwater tank it’s important that you get one that lasts and is fit for purpose.
Australian standards are put in-place to give households, peace of mind when it comes a tanks’ usability.
EXPERT SOLUTIONS
What makes Polymaster tanks the toughest?
- Self-supporting roof design means no support poles are necessary
- Extra thick walls for maximum strength
- Double strength UV+ resin ensures ultimate protection against the harsh sun
- One-piece construction with no joins, seams or part-lines
PRODUCT FEATURES
Highest Quality & Standards
Every tank is built to strict Australian standards, with quality fittings and components ensuring lasting performance and dependable, everyday water storage.
Ball Valve
Controls water flow at the outlet, letting you open or shut off supply quickly and reliably whenever it’s needed.
Brass Outlet
A durable, corrosion-resistant outlet fitting that connects to your plumbing or hose for reliable, long-term water access.
Lifting Lugs
Moulded into the tank for safer, easier handling during delivery and installation, without extra equipment.
Strainer
Filters debris and leaves from incoming water before it enters the tank, keeping stored water cleaner.
Overflow
Directs excess water safely away from the tank once it’s full, protecting the base and surrounding site.
Gallery
Explore Our Water Tank Gallery
See the small and medium round water tank in real-world settings, from rural properties to rooftop and aerial views, showcasing its size, build quality, and Colorbond® finish across a range of installations.
![RWT5000 Insitu [5,000L-garden tank]](https://polymaster.staging.chrstg.com/wp-content/uploads/2026/08/RWT5000-Insitu-5000L-garden-tank.png)
FAQs
Frequently Asked Questions
Got questions about the 5,000L round water tank? Here are answers to some of the most common questions about durability, safety, and performance to help you choose with confidence.
Are round rainwater tanks and components weatherproof?
Yes — Polymaster rainwater tanks are fully UV resistant and built for Australian weather conditions. Components are carefully selected to ensure they’re protected and resistant to the elements.
Is 5,000L enough for a household water supply?
It depends on household size and rainfall, but 5,000L is a solid mid-range choice for properties wanting reliable backup storage without the footprint of a larger tank — often paired with mains or a second tank for extra security.
Is the smooth wall poly tank weaker than corrugated poly tanks?
This is a common myth. Wall strength comes down to material thickness and type, not the corrugated or smooth finish. Both designs offer similar strength — it’s a matter of aesthetics rather than durability.
What do your round water tanks weigh?
Weight varies with tank size and the number of fittings, but our round water tanks are comparable in weight to fibreglass or galvanised alternatives.
Are round rainwater tanks and components weatherproof?
Yes — Polymaster rainwater tanks are fully UV resistant and built for Australian weather conditions. Components are carefully selected to ensure they’re protected and resistant to the elements.
Is 9,000L enough for a household water supply?
It depends on household size and rainfall, but 9,000L is a solid mid-range choice for properties wanting reliable backup storage without the footprint of a larger tank — often paired with mains or a second tank for extra security.
Is the smooth wall poly tank weaker than corrugated poly tanks?
This is a common myth. Wall strength comes down to material thickness and type, not the corrugated or smooth finish. Both designs offer similar strength — it’s a matter of aesthetics rather than durability.
What do your round water tanks weigh?
Weight varies with tank size and the number of fittings, but our round water tanks are comparable in weight to fibreglass or galvanised alternatives.