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Aquacomb Modular Water Tank System
Description

Aquacomb is a modular water tank system used for both detention and re-use of rainwater, installed under any ground surface or building foundation. The polyethylene tanks can be used for potable water storage, and are 100% recyclable.

Individual tanks (Aquacomb pods) are configured to form a water storage system. Pods are available in both 250L and 350L sizes, and can create any size of system required from 250L to over 100,000L. The AquaPit traps sediment at the entry/exit point of the system.

The Aquacomb System includes:

  • Aquacomb pods
  • Flow pipes
  • 90mm rapid seal
  • AquaPit
Key Features
  • Solves issues around constrained development therefore maximising development return.
  • Minimises site disruption — Aquacomb goes in with slab pour, making it faster to install and reduces coordination across multiple trades.
  • Can be installed under a house, patio, driveway, deck or lawn.
  • Ideal for tight urban or high-density sites, freeing up space for landscaping, driveways, or building footprint.
  • No additional excavation required, making it up to 40% cheaper than traditional underground tanks.
  • No ugly above ground tanks or pipework.
  • BRANZ Appraised.
  • The manufacturing process produces zero waste and tanks are 100% recyclable.
  • Due to its flexibility, Aquacomb is the best solution for high invert levels, discharge to curb, and rocky ground.
  • Installed by certified installers, giving reassurance that the product has been put in place correctly.
  • Tested after install and before the concrete is poured giving greater peace of mind.
NZ Made
NZ Made
Recyclable Content (Post-Consumer)
Post-Consumer Recyclable Content
Scope of Use
  • Aquacomb should be used to temporarily store rainwater for the purposes of detention or retention, or rainwater harvesting.
  • It can be installed within a concrete foundation, under the ground under a lawn or driveway or patio or pathway, or on the ground under an elevated house or deck area.
  • Scalable to project size; from single dwellings to large-scale developments — townhouses, apartments, and commercial buildings.
  • Ideal for tight sites, with no additional excavation required
  • Solution for high invert levels, discharge to curb, and rocky ground.
  • 250L and 350L sizes — can create any size of system required from 250L to over 100,000L.
Limitations on Use
  • Leaf diverters must be installed on downpipes entering the system
  • Aquacomb should not be used for storage of hot water or chemicals.
  • Tanks should not be cut to allow other pipes or fixings to penetrate through tanks.
Statement of Building Code Compliance

Aquacomb Pods, Flow Pipe and EPDM Rapid Seal:

  • B1 Structure: B1.3.1 (a)(b), B1.3.2 & B1.3.3
  • B2 Durability: B2.3.1 (a)
  • G12 Water Supplies: G12.3.2 (c) & G12.3.3
  • H1 Energy Efficiency: H1.3.3 (a)
  • F2 Hazardous building materials: F2.3.1

AquaPit:

  • G12 Water Supplies: G12.3.2 (c) & G12.3.3
  • E1 Surface Water: E1.3.3 (b), (c) & (d)
  • B2 Durability: B2.3.1 (b)
  • F2 Hazardous building materials: F2.3.1
In-Service History

Aquacomb has been used for 18 years across Australia and New Zealand. Thousands of homes have Aquacomb installed in-slab and other areas.

Other Performance Attributes
  • Each Aquacomb tank can hold up to 2000kg distributed load
  • Polyethylene tanks are 100% recyclable

Warranty

15 year warranty given on all Aquacomb systems provided they are installed and maintained in accordance with supplied information. 

Maintenance requirements include:

Aquacomb:

  • The leaf diverter is cleaned after large rainfall
  • The AquaPit is is regularly cleaned to prevent build up of debris
  • If debris enters the tanks, the first tank in the series has 15mm of dead space at its bottom. This will catch any debris before they enter other tanks. The tank can be cleaned out with a wet vacuum suitable for cleaning water tanks.

Aquapit:

  • The AquaPit must regularly have the debris cleared to prevent build up reaching the inlet to the water tank.
BRANZ Appraised
BRANZ Appraised
Documents
BPIR Product Statement: Aquacomb

17 December 2025

Technical Manual: Aquacomb

V4.2 2025

BRANZ Appraisal 991: Aquacomb

991 [2023]

Producer Statement PS1: Aquacomb

2024

Specifier Info: Aquacomb

2025

Owners Manual: Aquacomb

2024

Watersmart work with specifiers to help solve tomorrow's water challenges today, with in-slab water tanks, permeable paving, and water reuse systems.

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