THUNDAFLO Limited Manufacture and Market a Heavy Duty Channel Drainage System (often referred to as slot, linear or trench drain) in New Zealand and Australia, Key Benefits of THUNDAFLO are: Installation Savings: Three Metre Sections, Positioning System, Superior Hydraulics: Variable Built-in-FallRobust Heavy Duty Construction: 5 Year Parts WarrantyShort Order Lead Times: Competitive PricingCustom Manufacture Drains: Stainless, Slab Drain, Level Threshold