No products in the basket.
Price range: £30.00 through £39.20
The Kisner KADS Vertical Drain is a durable, watertight outlet designed for direct connection to vertical downpipes in flat roofing systems. Available in 3” (62–75 mm), 4” (90–110 mm), and 6” (148–160 mm) outlet sizes, it provides reliable drainage performance and a secure, sealed fit for long-term use in all weather conditions.
The Kisner KADS Vertical Drain is engineered for efficient roof drainage through vertical outlets, ensuring dependable water flow and long-lasting system integrity. Each drain is equipped with a high-quality rubber gasket, providing a tight, watertight seal to existing pipework and preventing backflow or leaks under pressure.
Constructed from robust polypropylene (PP), the drain is highly resistant to UV radiation, frost, and chemical exposure. It performs reliably under fluctuating temperatures and mechanical loads.
Supplied with an 18” square butylene fleece flange, the drain integrates seamlessly with waterproofing systems. The fleece must be securely bonded to the roofing membrane during installation to ensure a continuous, watertight connection.
Size | Pipe Connection Range | Recommended Application |
3” (62–75 mm) | Small-diameter pipework | Residential and compact flat roofs |
4” (90–110 mm) | Standard pipework size | Commercial and domestic flat roofs |
| 6” (148–160 mm) | Large-diameter pipework | Industrial and high-capacity drainage systems |
Compatible with PVC, HDPE, and cast-iron pipework
Use suitable roofing adhesive or primer to bond butylene fleece flange
For added protection, use with Kisner KADS Drain Leaf Guards or Flexible Leaf Guards
Designed for vertical drainage only — for horizontal applications, use Kisner KADS Parapet Drains
Store in a cool, dry location between 5–25 °C. Protect from impact, deformation, or prolonged UV exposure before installation. If stored in cold conditions, allow the product to acclimatise to room temperature prior to fitting.
Kisner Kads trims and finishing accessories are designed to protect roof edges while enhancing aesthetics. Their components offer a clean, professional finish and long-term weatherproofing support.
