The 5001L FatBoy Slimline Tank is designed for those who need big water storage capacity in a narrow footprint. Constructed by securely joining three of our proven 1667L FatBoy Round tanks with brass joiners and silicone, it combines the strength of round cylinders with the convenience of a slimline profile.
One of the standout benefits of this tank is its efficiency – it holds 5000 litres of rainwater within just 3 square metres of floor space. With dimensions of 925mm wide, 2925mm long, and 2250mm high, it’s perfect for positioning down the side of a home, alongside a shed, or in other tight areas where space is limited.
Thanks to its cylindrical construction, this slimline tank offers superior hoop strength, ensuring water pressure is evenly distributed and the tank remains structurally sound. Unlike single-piece slimline tanks, which are prone to splitting, Poly Water Tanks has NEVER had a tank split – proof of our commitment to durability and quality.
Each tank comes fully equipped with:
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A 400mm mosquito-proof inlet strainer
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A 90mm PVC overflow with mosquito screen
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A 25mm brass outlet and ball valve at the base
Made from food-grade polyethylene, the FatBoy Slimline is safe for drinking water and equally suited for irrigation, household use, or emergency supply. It is certified to AS/NZS 4766:2020 and proudly WaterMark Certified, meaning it meets Australian Standards and can be legally installed by licensed plumbers.
Lightweight at installation yet built to last, this tank is backed by a full 15-year warranty and is 100% Australian-made. The 5001L FatBoy Slimline Tank gives you maximum storage, peace of mind, and unbeatable strength in a compact design.
5001 Litre FatBoy Round Water Tank Dimensions:
Width 975mm
Length 2925mm
Height 2250mm
