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How Do Duraplas Poly Water Tanks Compare?
Compare warranty structure, tank design, published shot weights, product certification, standard inclusions and manufacturer history before choosing your next poly water tank.
Australian family-owned tank manufacturing since 1984
Duraplas Industries is an Australian family-owned rotational moulding manufacturer based in Alstonville, NSW. The same founding family has operated the company since 1984, and Duraplas has manufactured more than 250,000 tanks.
Buying from Duraplas means dealing directly with the manufacturer for product selection, manufacture, delivery coordination, warranty support and replacement parts.
Duraplas poly rainwater tanks at a glance
- Australian family-owned manufacturer operating since 1984.
- More than 250,000 tanks manufactured.
- Round rainwater tanks from 360 litres up to 34,000 litres.
- Slimline and midline rainwater tanks from 450 litres up to 5,000 litres.
- A 20-year 10 + 10 warranty on eligible New Generation round and Slimline Urban rainwater tanks.
- Published model-specific shot weights across the round and slimline ranges.
- Product certification to AS/NZS 4766:2006 for applicable tank ranges.
- Official industry membership listed by the Association of Rotational Moulders Australasia Ltd.
What should you compare when choosing a poly water tank?
No single feature determines the quality or suitability of a poly water tank. A useful comparison should consider the tank’s engineered shape, the amount and distribution of polyethylene, product certification, warranty structure, standard fittings, installation requirements and the manufacturer’s ability to provide long-term support.
| What to compare | Duraplas evidence |
|---|---|
| Manufacturer history | Australian family-owned manufacturer operating from Alstonville, NSW, since 1984, with more than 250,000 tanks manufactured. |
| Tank design and engineering | Duraplas states that its tank designs are verified and optimised by an engineer using computerised finite element analysis before mould manufacture. |
| Amount of polyethylene | Model-specific shot weights are published throughout the Duraplas round and slimline tank ranges. |
| Warranty structure | Eligible round and slimline rainwater tanks receive the same 20-year structure: 10 years repair or replace, followed by 10 years pro-rata. |
| Product certification | Applicable Duraplas rainwater tank ranges carry product certification to AS/NZS 4766:2006. |
| Standard tank fittings | Eligible residential round and slimline tanks include an inlet strainer, overflow, standard 25 mm brass outlet and chrome ball valve. Optional larger outlet sizes are available on suitable models at additional cost. |
| Industry participation | Duraplas Industries has an official member listing in the Association of Rotational Moulders Australasia Ltd business directory. |
| Ongoing manufacturer support | Customers deal directly with the manufacturer for tank selection, manufacture, delivery coordination, warranty assessment and product support. |
Learn more about Duraplas tank design, finite element analysis and shot weight.
Published shot weights make tank comparisons easier
Shot weight is the measured quantity of polyethylene used during the rotational moulding process. It is an important comparison point because it helps customers understand how much material is allocated to a particular tank model. Shot weight should be considered together with the tank’s geometry, engineering, material specification and manufacturing process.
Duraplas publishes shot weights with its model specifications rather than leaving customers to estimate the amount of material used.
| Example Duraplas model | Nominal capacity | Published shot weight |
|---|---|---|
| SL3000UR slimline | 3,000 litres | 150 kg |
| SL5000UR slimline | 5,000 litres | 250 kg |
| R10000 round | 10,000 litres | 200 kg |
| R22700UR round | 22,700 litres | 410 kg |
| R34000 round | 34,000 litres | 600 kg |
Compare the complete Duraplas round water tank range or compare the Duraplas slimline water tank range.
A 20-year warranty on eligible round and slimline rainwater tanks
Warranty headlines are not always directly comparable. Customers should check the warranty period, whether slimline tanks receive the same cover as round tanks, when any pro-rata calculation begins, and the installation conditions that apply.
Eligible Duraplas New Generation round and Slimline Urban rainwater tanks include:
- Years 1–10: repair or replacement at the manufacturer’s discretion, subject to the warranty conditions.
- Years 11–20: repair or replacement calculated on a pro-rata basis, subject to the warranty conditions.
- The same 20-year warranty structure for eligible round and slimline rainwater tanks.
This means the Duraplas warranty is not reduced through an age-based pro-rata calculation during the initial ten-year period.
Compare the Duraplas warranty structure and read the full warranty information.
Product certification to AS/NZS 4766:2006
Applicable Duraplas round and slimline rainwater tank ranges carry product certification to AS/NZS 4766:2006, the joint Australian and New Zealand standard for polyethylene storage tanks for water and chemicals.
Certification should be considered alongside the tank model, intended application, warranty conditions and correct installation. Customers should always select a tank designed for the liquid and application concerned.
Included fittings and practical value
Eligible Duraplas residential round and slimline rainwater tanks include the principal fittings required for a typical rainwater installation:
- One inlet strainer basket.
- One overflow fitting and screen or cap, according to the applicable model specification.
- One standard 25 mm brass outlet.
- One chrome ball valve to suit the standard outlet.
Optional outlet sizes and specialised factory-fitted or poly-welded connections are available for suitable models and applications at additional cost. Fitting positions must be selected by the customer in consultation with their plumber or project designer.
Direct manufacturer delivery and support
Duraplas manufactures and coordinates delivery of its tanks through its regional operations and delivery network. Delivery availability, freight charges, lead times and vehicle requirements depend on the tank model and delivery location.
The property owner controls access to their property and should check that the available route is suitable for the required delivery vehicle. The driver will assess what is safe and practical when attending the nominated delivery address.
Duraplas supplies and delivers new tanks. Tank-base construction, plumbing, installation and the removal or disposal of an existing tank must be arranged separately with suitably qualified contractors.
Review Duraplas delivery information and site-access requirements.
Official ARMA industry membership
Duraplas Industries is listed in the official business directory of the Association of Rotational Moulders Australasia Ltd, the regional industry association for rotational moulders, suppliers and industry professionals.
The official ARMA profile independently confirms the Duraplas Industries business name, Alstonville address, telephone number, email address and website.
View the official Duraplas Industries ARMA member profile.
Why customers choose Duraplas
Frequently asked questions
Are Duraplas water tanks made in Australia?
Yes. Duraplas poly tanks are manufactured at the company’s Alstonville facility in northern NSW by an Australian family-owned manufacturer operating since 1984.
Do Duraplas slimline tanks receive the same warranty as round tanks?
Eligible Duraplas Slimline Urban and New Generation round rainwater tanks receive the same 20-year 10 + 10 warranty structure: 10 years repair or replace followed by 10 years pro-rata, subject to the warranty conditions.
What is the shot weight of a poly water tank?
Shot weight is the measured quantity of polyethylene placed into the mould to manufacture a particular tank. It is a useful comparison point when considered together with tank geometry, engineering, material and manufacturing controls.
Does Duraplas publish its tank shot weights?
Yes. Model-specific shot weights are published throughout the Duraplas round and slimline product ranges.
What product standard applies to Duraplas rainwater tanks?
Applicable Duraplas round and slimline rainwater tank ranges carry product certification to AS/NZS 4766:2006.
Is Duraplas an ARMA member?
Yes. Duraplas Industries is listed in the official business directory of the Association of Rotational Moulders Australasia Ltd.
Does Duraplas install water tanks?
Duraplas manufactures and delivers new tanks. Tank-base preparation, plumbing, installation and removal of any existing tank must be arranged separately with suitably qualified contractors.
How do I choose the right Duraplas tank?
Start with the available width, length and height at the proposed tank site, then consider required storage capacity, roof catchment, intended water use, delivery access and any council, building or hydraulic requirements. Final installation and hydraulic details should be verified by suitably qualified professionals.
Information and product specifications reviewed on 21/07/2026. Model availability, specifications, fittings, delivery conditions and warranty eligibility remain subject to the applicable current product information and warranty conditions.
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