
The Action Tanks underground tank is a modern-day solution for rainwater capture and rainwater harvesting. It’s a lightweight ‘space saving’ underground tank that provides lifting lugs at top of the tank for ease of maneuverability and installation.
Manufactured from finest quality food-grade Australian polyethylene, the tank is extremely durable and highly resistant to cracking caused by external pressure created by ground movement. The high quality polyethylene also prevents any materials from leaching into the water.
Action Tanks underground tanks can be installed individually to suit smaller domestic projects or alternatively, a “servant tank” system can easily be specified to allow development of “reservoirs” for much larger domestic and commercial projects.
The 150mm inlet, compared to the 600mm-800mm of other tanks, provides a child-safe and aesthetically appealing solution. The underground tank is installed out-of-sight under your lawn, patio or driveway – the tank remains hidden except for the visible 15cm Child Safe inspection cap.
Underground Rainwater Tanks
| Systems | Code | Litres | Diameter | Overall Height |
|---|---|---|---|---|
| Split Master | AWC-SM-5000 | 5000 | 2120 | 2255 |
| Action Water Cell | AWC-D-5000 | 5000 | 2120 | 2255 |
| Servant Tanks | AWC-S-5000 | 5000 | 2120 | 2255 |
Note: Inlet and Outlet upgrade to 150mm available.

Features & Benefits
The Action Tanks Underground Rainwater system is lightweight’ space saving’ underground tank that provides lifting lugs at top of the tank for ease of maneuverability and installation; it’s also extremely durable and highly resistant to cracking caused by external pressure created by ground movement.
Additional features and benefits include:
- Underground Cell Approved and Certified to AS/NZS 1546.1
- First to receive ‘Smart Approved Watermark’.
- Watermark control box.
- Lightweight, robust bell-shaped cell combats hydrostatic lift.
- Cost-effective and easy to install design.
- Child-safe 150mm access point at top of tank for maintenance.
- High quality Onga Dominator Submersible pump and controller.
- Underground cells are easily combined to create large reservoirs.
- Made from finest quality food-grade polyethylene.
- Meets Aust. Standards AS4020- drinking water use.
- Meets Aust. Standards AS2070 for food contact use.
- Council regulation compliant for easy approval.


