Slimline Rainwater Tanks was the first company to invent the 'Slimline' shape ColorBond Steel water tank over 36 years ago. We are now known as WaterLine Tanks.

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The Original Slimline Rainwater Tank

Speak to one of our sales consultants now. Call us on 1800 804 901

Colorbond Slimline Rainwater Tanks Melbourne: The ORIGINAL... and still the BEST!

  • We Invented the 'Slimline' Tank...

    First came the Slimline was our unique Slimline Squared range we are going to invent a tank specially for you! Custom made sizes and designs

  • Designed and Built for Architects

    We actually are the best: Combining 30 Years of Experience with Innovation has made us the market leader in Colorbond Tanks

  • Genuine Bluescope Colorbond® Steel

    We only use the real stuff - we don't believe in just spraypainting. Genuine prepainted Colorbond Aquaplate Steel has been designed for the harsh Australian environment

  • Quality Built and Constructed

    After 30 years we really know what we're doing and we are passionate about making tanks. Each tank undergoes a strict QA test before leaving our factory

  • Long-life Construction Warranty

    if it breaks we fix it... but we make them unbreakable to start with. Our tanks are backed by the Bluescope Steel Warranty for peace of mind assurance

  • Unsurpassed Quality, Guaranteed!

    Don't just take our word on it - each tank is Engineered and Certified to Australian Standards. We were the first watertank to become Watermarked

  • Just wanted to get back to you & thank you all for the tanks you delivered recently. I know it was a challenging driveway for your driver to cope with so a big thanks for his patience & effort, and to your adaptability to our changing schedule. The tanks look great & appear really well built, sealed & finished. We put 8000L in the big one the next day, all solid. Thanks for your quick reply to my initial quote request & your direct answers to all my questions - it got you the job.

    Russell & Michaela ~ Eltham, Vic
  • Tank received this morning and I couldn't be happier! I will be in touch at the end of next year when I intend to buy two very large tanks for a planned renovation!! Your driver is so friendly and very helpful, please do pass on my thanks for his efforts and I really appreciate your great service as well. Also attached are some pics of the tank located pride-of-place in the front garden! I'm going to paint the wrought iron a similar colour so it will all blend in beautifully.

    Lynda ~ Northcote, Vic
  • Please thank Phil for me for all his help and pass on our praise for the entire team which have shown how to service client needs very well . Wish all our dealings with other service providers was as good.

    Chris Despotelis ~ Melbourne, Vic
  • Thank you for organizing the delivery for between 1:00pm and 3:00pm…we appreciate it and thank you and your Team for the efficient manufacture of our tank.

    Richard Jones ~ Brighton, Vic
  • My husband and I would happily refer people to Slimline. All our interaction with the company has been seemless. It doesn’t seem to matter who you speak to at the office everyone is accommodating, friendly and every willing to help. No one at the office is pushy just really down to earth and let you make up your own mind. It is fantastic to see a company in rural Victoria so well run and successful. The first time we visited the factory we were pretty impressed with the friendly workers in the factory as well as the office staff. Congratulations to management for employing people who work hard at producing a quality product and genuinely care about customer service.

    Anne Clarke-Bowman ~ Sale, Vic
  • Slimline Tanks had the best price, great customer service, free delivery to our area although it was over 90kms away, and our new tank looks fabulous!

    Vicky ~ Williamstown, Vic
  • Thanks for the quick turn around on this tank it’s really appreciated and the client is wrapped.

    Panoramic Landscapes ~ Melbourne, Vic
  • We’ve been using Slimline Tanks since the government rainwater harvesting legislation was first introduced. We prefer the looks and durability of Colorbond steel, as do our owners and combined with quality of tank Slimline produces, we’re happy customers.

    Graham New ~ New Designer Homes
  • Thank you for the delivery last Thursday. It came early which was a bonus. I really appreciate the speedy & easy way my order was managed.

    Nicole ~ Langwarrin
  • The tank was delivered in good order and we are very happy with the design and looks. We are very satisfied with your service and communication. It has been a breeze. After hearing all the horror stories of people going through a bad experience we can only praise your company for delivering an excellent product, on time and at a reasonable price. We might need another tank in the future and will definitely order it from your company again. I will highly recommend your company to anybody who's interested purchasing rain water tanks. Thanks for your service!

    Luc dePauw ~ St Andrews, Vic

What Makes Our Tanks Stand Out From The Crowd?

Subtle Differences That Make Our Tanks Simply The Best

What Makes Our Tanks Different?
  • They're Tough: Constructed using BlueScope® Steel
  • They're Safe: Aquaplate® lined for drinking quality and safety. Meets AS4020: Safe Drinking Water usage
  • They're Strong: Strength of Steel means they won't bulge or split (Water is heavy! - 1000 Litres = 1 ton)
  • They're Durable: Stainless Steel internal bracing
  • They're Certified: Watermarked, Engineer Certified and eligible for Government Rebates
  • They're Guaranteed: 20 years BlueScope® Warranty PLUS Slimline's own construction warranty
  • They're Better Backed: Over 30 year old company with highly trained staff
  • They're Non-combustible: Won't melt or burn

Areas we deliver to?

We personally deliver your order with the greatest care Victoria wide including:

  • Melbourne metro - from Cranbourne to Cragieburn, from Point Cook to Pakenham
  • Mornington Peninsula - From Langwarrin to Portsea
  • Bellarine Peninsula - from Portarlington to Lorne
  • Gippsland - from Warragul to Mallacoota
  • Western District - Ballarat, Warrnambool
  • North - Albury, Shepparton, Bendigo

Need a New Rainwater Tank?

Speak to one of our sales consultants to get started. We also don’t charge any extra for custom built tanks.

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