Introducing the 4,500L Mega Slim

The largest slimline tank in W.A & the newest addition to the West Coast Poly’s Residential Range

Unlock ultimate water storage for your home with the 4,500L Mega Slim—From West Coast Poly! Perfect for suburban homes, it’s designed to fit neatly under eaves, along walls, or attached to sheds.

After hearing from many of our customers who wanted a larger slimline tank, our design team got to work, creating the Mega Slim to meet your needs.

The result? A tank that not only delivers on capacity but is also structurally certified and engineer-approved to the AS4766 Standard for Rotationally Moulded Storage Tanks. Plus, it’s fully compliant with AS/NZS 4020:2018, meaning it’s safe for storing drinking water.

The Mega Slim is also available with our all-in-one automatic rainwater harvesting system, designed to make collecting and reusing rainwater effortless. This smart system takes care of everything, featuring a roof-mounted automatic water switch, mains isolation valve, submersible pump, leaf strainer, overflow port, inspection hatch, and outlet tap—giving you a seamless solution for in-house rainwater reuse.

Need even more storage? Easily connect a second tank to double your capacity.

Maximise Your Water Storage, Maximize Your Space: WA’s Biggest Slimline Tank Awaits

Delivery

West Coast Poly offers an efficient delivery service direct to you. A Delivery Fee of $110 inc gst applies to all Urban Tanks (320L – 4,500L Slimline) delivered direct to customers address/premises in the Perth Metro Area and Regional WA Areas within 800km of our Canning Vale Factory.

The 4,500L Mega Slimline tank is curb side delivery only.

If you order your urban tank direct from your local distributor, it can be delivered direct to their Agency for you to collect or you can make alternative arrangements for delivery.

ENQUIRE NOW

1800 555 185