Water Tank Products Range
WA-Made Water Tanks for Homes, Farms & Backyards
Water Tanks Built For WA – Engineered for the Bush. Designed for the suburbs. Trusted in every backyard.
At West Coast Poly, we build water tanks for every part of Western Australia — from metro courtyards, to large blocks and wide open farmland. Proudly manufactured in Perth WA, our tanks are designed for local conditions, so whether you’re looking to store rainwater for your garden, secure a reliable water supply for livestock, or reduce your mains water use, our tanks are designed to do the job — and built to last.
For rural properties, farms, and larger blocks, our range of water tanks from 4,500L to 50,000L provide reliable water storage. Lightweight and easy to install, each tank is engineered for strength using a seamless, one-piece moulding process that’s perfectly suited to WA’s demanding climate. From collecting runoff off a shed roof to everyday farm use, they’re built for life on the land.
In suburban areas, where space is often a challenge, our slimline and compact tanks — ranging from 320L to 4,500L — are designed to fit neatly down the side of a house, under eaves, or into tight backyards.
For the next step in water efficiency, our automatic rainwater harvesting systems offer Perth households a seamless way to collect and reuse rainwater inside the home. These plug-and-play systems offer a sustainable, low-maintenance solution that helps reduce your reliance on scheme water.
Every tank we produce is manufactured right here in WA at our Canning Vale facility. Each tank is tested, certified, and built to our exacting quality standards — backed by ISO 9001 and WaterMark accreditation.
Whether it’s for the family home or the outback, water matters — and a tank from West Coast Poly is a simple, effective way to harvest rainwater and take control of your supply. With delivery available across Western Australia and expert support just a call away, getting started couldn’t be easier, get in touch with our friendly team to find the right tank for your property.
SELECTING A RESIDENTIAL TANK
When it comes to picking the right West Coast Poly tank we recommend you consider these things.
Water Tank FAQ
Do your tanks come with a warranty?
Yes! Our tanks are built to last and backed by industry-leading warranties:
• Water Tanks (4,500L – 50,000L) come with a 20-year warranty
• Slimline & Small Water Tanks (320L – 4,500L) come with a 10-year warranty
Where are your tanks made?
All our tanks are made to order at our Canning Vale factory in Western Australia. We use advanced rotomoulding technology to create a seamless, single-piece tank with thick, impact-resistant walls. Each water tank is fitted with high-quality components like Philmac ball valves for strength, reliability, and ease of use.
What are the benefits of a poly water tank?
Poly tanks are strong, lightweight, and built for harsh Aussie conditions.
• No rust, no corrosion – install them on any flat surface
• Seamless construction – no joins, rivets, or weak points
• UV-resistant – we use materials that exceed the Australian standard (UV 20)
• Food and water safe – certified to AS/NZS 2070 and AS/NZS 4020
• No taste contamination – poly won’t affect water flavour
Easy to install, easy to move, and built for decades of service.
Where should I place my tank?
Tank placement depends on your available space and roof access. Try to locate your tank near a downpipe to maximise rainwater capture and minimise plumbing. Not sure what will fit? Check out our range or contact us for advice.
What size or style water tank do I need?
From 320L to 50,000L, we have a tank to suit your space, water needs, and property type.
• Use your roof area and average rainfall to estimate how much water you could collect
• Think about how you'll use the water: garden, toilet, laundry, drinking, or pool top-ups
• If in doubt, go bigger—extra capacity gives peace of mind during dry periods
• Slimline tanks are great for tight urban spaces; round tanks are ideal for open areas
What colours and customisation options are available?
Our tanks come in a wide range of Colorbond® - matched colours, so you can blend in or stand out. We also offer accessories like pump kits, filters, and greywater options to help you build a complete rainwater system.
What fittings come with the tank?
• Large Capacity Tanks (4,500L – 50,000L): Screw-top lid, mesh leaf strainer, bug-proof overflow, brass outlet, and a Philmac poly ball valve
• Residential Round & Slimline Tanks (320L – 4,500L Slimline): Screw-top lid, mesh leaf strainer, bug-proof overflow, drain bung, and lever action tap
Do you offer delivery?
Yes! We offer reliable delivery direct from our factory to your door.
Residential Tanks (320L – 4,500L Slimline): Flat fee of $110 within 800km of Perth
Large Capacity Tanks (4,500L – 50,000L): Free delivery within 800km of Perth
Our dispatch team installs standard fittings before delivery for a smooth setup.
What are my pump options?
We supply a range of pump kits using trusted Australian brands like Davey and Onga. Whether you need a compact pump for garden use or a larger system for household plumbing, we can help find the right setup.
Are your tanks UV-resistant?
Absolutely. We use UV-resistant polyethylene that surpasses Australian UV standards, giving you long-term performance under WA’s harsh sun.
Are your tanks safe for drinking water?
Yes. Our tanks are made from food-grade polyethylene certified to:
• AS/NZS 2070:1999 for food contact
• AS/NZS 4020:2018 for potable (drinking) water
Are West Coast Poly tanks certified?
Yes, we’re an ISO-certified and WaterMark-certified manufacturer. All tanks comply with Australian standards and are built with genuine WaterMark-approved fittings.
How do I order a tank?
You can order through one of our trusted resellers who are situated across WA. To find out your local reseller and order a tank call our team on 1800 555 185.
• Visit one of our trusted reseller stores across WA
• Filling out an enquiry order on our Contact Page
• Calling our team on 1800 555 185
Do you have tanks in stock?
All water tanks are made to order, so we don’t keep them in stock. Our typical lead time is 2–3 weeks, though it can extend to 6 weeks during busy periods.
How do I choose the right tank for my needs?
It depends on your water use, roof catchment size, and available space.
• Rural properties often benefit from larger tanks (4,500L–50,000L)
• Residential areas suit slimline or round tanks from 320L to 4,500L
Unsure? Our team is happy to help you assess your options
Do poly tanks need much maintenance?
Very little! Just flush the tank occasionally and keep the strainer clean. That’s it.
Are your tanks long lasting?
Definitely. Our large capacity water tanks come with a 20-year warranty, and residential water tanks with a 10-year warranty—a testament to their long-term durability.
What do I need to do before my tank arrives?
Check out our Delivery Preparation Guide for everything you need to know before your tank gets delivered. It includes site prep, access requirements, and other handy tips.
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2026 PRICE LIST
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