Best for: custom-engineered polyethylene detention and retention systems, and sites needing council-compliant design support.
APD is a New Zealand-owned company that has specialised in polymer design, fabrication, rotomoulding and welding for over 35 years, manufacturing from Wiri, Auckland. Rather than supplying only off-the-shelf tanks, APD’s in-house team takes projects from concept to a delivered, compliant product. This suits tight urban sites and developments with specific engineering requirements.
APD’s stormwater range includes StormLite®, StormSlab® and StormSlim® detention/retention tanks, StormPit® sumps, StormPit® Bubble Up and RainWorx® rainwater harvesting. APD is also one of the only companies in NZ approved to fabricate polymer chemical storage tanks to the Health and Safety at Work (Hazardous Substances) Regulations 2017.
APD works across the full stormwater market, so it helps to understand where each type of supplier fits. Here’s how the main New Zealand providers compare:
| Supplier | Primary material | Best for |
|---|---|---|
| APD | Polyethylene | Custom-engineered detention and retention on tight or complex sites, with in-house design and PS1 support |
| Tanksalot | Steel | Above-ground installs where finish matters |
| Infratank | HDPE | Infrastructure-scale projects |
| Watersmart | Polyethylene | Space-constrained urban sites |
| Bailey Tanks | Polyethylene | A wide range of standard sizes |
| Ross Tanks | Concrete | Residential and commercial projects |
| Promax | Polyethylene | Trafficable areas such as driveways and car parks |
| Devan | Polyethylene | A variety of soil and site conditions |
| Bowers & Son | Concrete | Residential-scale retention |
Weigh up your required volume and tank type (detention, retention or dual-purpose), your site constraints (space, soil, load-bearing), and your council’s compliance requirements, including whether you’ll need a Producer Statement (PS1). Consider whether a supplier can tailor a solution to your site or only offers standard sizes.
If you’d like help matching a stormwater solution to your site and council requirements, APD’s team can take your project from concept to a delivered, compliant tank.
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