Water Tanks ranging from 1,000L to 45,000L. Tankmasta offer the Highest Quality Tanks, with the Lowest Cost Installation. Award winning underground 'Donut' and 'Bagel' offer unprecedented structural integrity with minimal installation costs. All Tankmasta tanks meet Australian Standards and REBATE READY. Visit our site to check what rebates you are entitled to for installing a water tank! Tankmasta are a well established water tank manufacturer with over eight years in the business, water tanks aren't just a product for us, their a business. Australian made and Australian owned.