The Original FenceTank™
Slimline Rainwater Tanks NZ – Space-Saving Water Storage Solutions
→ Features
We love solving complex problems.
Ultra‑slim & space-saving design
At just 410 mm deep, FenceTank is one of the narrowest above-ground tanks available, seamlessly blending into your fence line—perfect for compact urban or high-density properties
Quick & easy installation
No concrete base required—simply fix it to fence posts with coach screws. DIY-friendly for outdoor setups, or team-installed for indoor water use
Modular & scalable
Each unit holds 1,000 L and tanks can be joined together to increase volume, supporting everything from a single home to multi‑unit developments
Durable, low‑maintenance & certified
Made from UV-resistant, food-grade polyethylene with a 10‑year warranty and GreenTag certification—assuring durability, health safety, and environmental responsibility
FenceTank™ Installation
→ Benefits of FenceTank™
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Save Time
Quick and easy to install. They do not require a concrete base. FenceTanks only need a minimum of four coach screws attached to a fence post on level ground. Ideal for developments and projects with limited space without a Ribraft slab foundation.
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Connect As One
The 1,000L model has been designed to connect together to increase volume. Each tank can be installed in series into one storage facility, to maximise your projects stormwater dentention or reuse requirements.
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Sleek & Stylish
Blends in naturally with your projects periphery allowing for a smart and almost invisible solution. The tank is the fence. Pipework is hidden within the tank itself, available in a range of colours to compliment your projects design.
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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.
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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 project can accommodate, and your roof can fill.
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Proudly NZ Made, 10 Year Warranty
FenceTank™ is made by Kiwi’s for Kiwi’s. An original design by Watersmart, it is manufactured and dispatched in Auckland, with manufacturing facilities in the Lower North and South Islands.
→ Colour Options
Our FenceTank Colours are compatible with COLOURSTEEL®'s colour range.
Other colours are available on request, minimum order quantities and lead times may apply.
Colour matched end panels and caps sold separately.
Birch Grey
Slate Grey
Black
→ 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.
→ Explore In-Depth Case Studies
New Zealand's Only Whole-System Water Experts: Stormwater Management & Water Sustainability
Case studies are a great way to understand how our products are being used in the real world. They provide a glimpse into the success stories of our customers, and show us how our products have helped them achieve their goals.
→ Download Resources
FenceTank™ Technical Pack
This pack contains:
- Designer Specifications
- Design Report & PS1
FenceTank™ Compliance Pack
This pack contains:
- Compliance Statement
- Product Assurance Supplier Statement
- AS/NZS 4020:2005
- BSI
- Code Compliance
- Building Performance Information Form
- MBIE Water Tank Determination
FenceTank™ Installation Pack
This pack contains:
- Site Prep Examples
- Prestart Checklist
- Installation Guide
- Installation QA
FenceTank™ Homeowner Pack
This pack contains:
- Care and Maintenance Guide
- FenceTank Warranty
FenceTank™ FAQ's
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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.
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Each 1,000L FenceTank™ weighs approx. 90kg when empty and approx. 1,090kg when full.
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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.
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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.
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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.
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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.
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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
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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.
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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.
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Yes, Watersmart can provide this service for you! Although a competent home handy-person with the right tools can do this.
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Building consent is only required if you plan on connecting water tanks to your internal plumbing. It is not required for outdoor use only.
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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.
Tell Us About Your Project
From conceptualising to constructing, we’re ready to design your architectural dream. We promise a client-centric approach that empowers ideas, eases concerns, and delivers quality craftsmanship we’ll all be proud of.
