22500 Litre Round Water Tank



22,500 Litre Round Water Tank 

SKU: RWT22500

Product Documents

Lead Time: 2-3 weeks

None Additional 25mm Outlet & Valve +$75.00 Additional 40mm Outlet & Valve +$100.00 Additional 50mm Outlet & Valve +$138.00 Additional 75mm Outlet & Valve +$450.00 65mm CFA Coupling +$380.00 Inspection Cover +$49.00
None ASC J35/50 | 35m Head | 50LT/min +$300.00 ASC J50/100 | 50m Head | 100LT/min +$565.00 ASC M60/20 | 60m Head | 120LT/min +$675.00 DAB ESYBOX +$1,775.00

22,500 Litre Polymaster Round Rain Water Tank

SKU: RWT22500


Capacity: 22500 Litres (5000 gallons)
Diameter: 3560 mm
Inlet Height: 2470 mm
Overall Height: 2800 mm

This popular large 22,500 Litre water tank is well suited to rural properties or large town blocks where you require plenty of water storage especially in combination with a second tank when rainwater is your main supply for household use. This certified rainwater tank is manufactured with strength in mind.

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.

The relevant standards to look out for (from an ISO9001 tank manufacturer) are:
  • AS/NZS4766:2006 – Polyethylene storage tanks for water and chemicals
  • AS/NZS4020:2018 – Testing of products for use in contact with drinking water
Benefits of a Premium Polymaster Rainwater Tank
  • 20 year warranty.
  • One piece construction. No joins, seams or part-lines, making it stronger.
  • Extra thick walls for maximum strength.
  • Conserve precious water supplies and reduce mains water use.
Standard free inclusions:

1 x 400mm Inlet strainer (mozzie proof), 1 x 90mm Overflow, 1 x 40mm Brass pump outlet.

Please feel free to give our friendly and highly qualified staff a call on (03) 8795 7715 today to discuss custom tank fittings if required.

Why a Polymaster Tank?

Polymaster tanks are certified with AS/NZS 4766:2006 for water and chemicals and AS/NZS 4020:2002 for drinking water and are independently audited by SAI Global.

Polymaster are manufacturers of an extensive range of quality products for industrial, residential and agricultural applications. Over the last two decades, Polymaster has been at the forefront of industry endorsed, product certified designs that have advanced the lifespan and functional capabilities of process vessels, bulk storage, rainwater tanks and animal care products. See the video below to see why Polymaster are an industry leader.

Corrugated Design

Polymaster’s traditional corrugated wall profile cannot be substituted for strength and appearance. A well known fact is, as soon as an object receives some ribbing the rigidity increases enormously.

21 Aussie Tank Colours

Polymaster tanks comes in Australia’s favorite colours. The colours were kept in mind to complement your tank with your sheds, fences, guttering, or surrounding landscape including residential properties.

ASC Water Tanks Colour Choices

What makes Polymaster tanks the toughest?
  • Self-supporting roof design means no support poles are necessary
  • Extra thick corrugated walls for maximum strength
  • Double strength UV+ resin ensures ultimate protection against Australia’s harsh sun
  • One-piece construction with no joins, seams or part-lines
  • Certification to AS/NZ4766 tank standard
  • 22 COLORBOND® colours
  • 20 Year Warranty for peace of mind! *conditions apply

The clearance required for truck and trailer is 19m long, 5m high and 3.5m wide. Please ensure there are no low-hanging branches or powerlines. Please ensure the entrance to your property is wide enough and there is enough turning area (size of standard roundabout).



Dimensions (mm)

3560 D x 2800 H

Inlet Height


Supplied Accessories

Inlet Strainer @ 12 o'clock, Overflow Screen @ 11:30


1 x 40mm brass outlet and ball valve

Water Tank Colour

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10 Years Manufacturers Warranty



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