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Slimline Water Tank & Rainwater Reuse System
Your Complete Rainwater Collection Solution

In a modern minimalist building project, form and function are essential.

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A large, unsightly water tank is one of the most obvious ways to ruin that ambience and is simply not an option where space is limited.

With FenceTank™, you can create an almost invisible, slimline water resue system that seamlessly blends into the perimeter of your development. It’s perfect for sites that have limited space.

FenceTank™ is a popular solution for developments of all scales, from single sites to high-density housing.

Your Complete Rainwater Collection Solution

Slimline Water Tanks Perfect For Small Sites

Fencetank® is an innovative detention and re-use system designed to manage rainwater and stormwater for New Zealand buildings.

FenceTank™, our newest slimline water reuse innovation, naturally blends with a property’s perimeter; allowing for a smart and almost invisible solution.

With FenceTank™ you have a discrete and attractive rainwater collection system.

Each slimline tank is only 410mm deep and holds 1,000 litres of water, equivalent to 4-days water supply for the average household.


Colour Options

Other colours are available on request.

Birch Grey

Slate Grey


FenceTank™ The Water Reuse System Of Choice For

High-Density Developments

Approved boundary tanks for high density developments

Residents of a Hobsonville Point subdivision that use the FenceTank system to collect rainwater have saved an average of 56% on their water bills. This represents the same amount of water that can use for potable purposes, such as washing the car, watering the garden, and flushing toilets.

Why Choose FenceTank™

Save Time

Quick and easy to install. They do not require a concrete base. Just four coach screws attached to a fence post.

Save Space

A thin water tank that is only 408mm deep – one of the narrowest above-ground tanks on the market! Dimensions: 1800mm high x 1800mm long x 410mm deep.

Connect Together
The 1,000L model has been designed to connect together to increase volume.
Save Water
A single FenceTank™ holds 1,000L of water! Equivalent to four-days water supply for the average household. You can have as many tanks as your property can accommodate, and your roof can fill.
Sleek & Stylish
Blends in naturally with your property’s periphery allowing for a smart and almost invisible solution. Your tank is your fence. No ugly pipework or appearance above the fence line as all pipework is hidden within the tank itself. Comes in a range of attractive colours.
Proudly NZ Made, 10 Year Warranty
FenceTank™ is made by Kiwi’s for Kiwi’s. It is designed and manufactured in Penrose, with manufacturing facilities in the Lower North and South Islands.

Your One-Stop Water-Saving Solution

Watersmart provides you with an end-to-end stormwater solution for saving water and money.

Each property is unique, and so our team will design a rainwater collection plan based on your needs.

  • The size of your roof
  • Location on-site: the position of existing fences, new fences or wall fixings
  • How much rainwater you want to collect
  • Your budget
  • What you want to use the water for: e.g. gardening, vehicle washing or in the home

What’s the best solution for you? Our team of helpful experts will talk you through your options, so you can make the right choice for you.

FenceTank™ was designed to allow for any qualified tradesperson to install it by utilising the readily available components which come in a pre-made kit. A qualified plumber will be required if you plan on connecting to your home plumbing.

Watersmart’s solutions are designed to prevent leaves and debris from entering your tank, so very little maintenance is required. However you can opt for an annual servicing plan that includes one of our technicians:

  • Checking fixings to ensure FenceTank™ is securely fastened
  • Checking leaf guards and filtration devices are working correctly
  • For re-use systems: checking the pump controller and blackflow valve is operating to standard
  • Checking to see whether the homeowner has any questions!

Tank Grade Plastic

Made with Rotathene Tank Grade plastic which is globally recognised as the most appropriate grade for New Zealand’s harsh conditions and UV light.

This grade carries a series of certifications and complies with many international standards within the tank industry. It is designed for potable water or stormwater and is ideal for re-use systems.

Our tanks can withstand 15,000 hours of harsh UV lights, 8,000 hours above what is legally required. Complies with NZS4766.

Learn more about Matrix Polymers Rotathene tank grade plastic.

FenceTank™ FAQ's

FenceTank™ is made of high-quality food grade plastic which also has a UV rating of 15, which is recognised as the most appropriate grade for NZ conditions.

Each 1,000L FenceTank™ weighs approx. 90kg when empty and approx. 1,090kg when full.

As the tank is made of polyethylene, which does not take paint well, we would recommend attaching a fence to the back as a first option. Painting the tank may null and void the warranty.

The fence posts protrude ~ 25mm (if using 100mm x100mm posts) or 50mm if using 100mm x 125mm posts. This allows for any fence paling and/or panels to be attached.

No, the FenceTank™ doesn’t require a concrete when positioned on what is defined in the building code as good ground, a level base of compacted gap7 gravel is sufficient. This saves you time and money! However, if the ground condition is less stable, a concrete plinth is recommended.

It is NOT recommended to fix the FenceTank™ to the posts of an existing fence unless the designer and/or installer is able to establish that the posts meet the FenceTank™ fixing requirements as per the FenceTank™ PS1.

Only simple, annual cleaning is required to maintain the FenceTank™ exterior. Use a soft bristled brush, water, or water mixed with a mild detergent to wash the plastic.

When used to store non-potable water, the interior of the tank does not require any maintenance since the use of leaf guards etc will remove vegetation before entering the tank. It is probable that small amounts of dust or similar will enter the tanks, but the amounts will not impact on the storage or capacity of the FenceTank™.

It is recommended that you follow your local councils’ guidelines for tank and pump maintenance

Any keen DIYer (with the correct tools) can install FenceTank™ when the water collected is only intended for outdoor use.

FenceTank™ must be installed by a registered plumber, such as a Watersmart technician, if the water will be used inside the home, (such as in the toilet and laundry). Contact us to find out more.

Yes, a tap can be installed near the base of the tank to gravity feed a tap. Although this will initially provide good pressure this will significantly reduce as water level lowers.

Yes, Watersmart can provide this service for you! Although a competent home handy-person with the right tools can do this.

Building consent is only required if you plan on connecting water tanks to your internal plumbing. It is not required for outdoor use only.

No, FenceTank does not come with caps. The reasoning for this is that many architects preferred the tank without caps.
The caps don’t provide any structural support to the tank and are purely for aesthetic purposes.

Caps are available at an additional cost. Get in touch with our team for pricing.

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