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Price range: £21.20 through £29.68
The Kisner KADS Vertical Clamp Ring Drain is a high-performance, watertight outlet designed for efficient drainage on flat and low-slope roofing systems. Available in 3” (62–75 mm), 4” (90–110 mm), and 6” (148–160 mm) sizes, it provides a secure, gasket-sealed connection to standard vertical pipework and long-term reliability under all weather conditions.
The Kisner KADS Vertical Clamp Ring Drain is engineered to provide reliable vertical drainage for a wide range of flat roofing applications — from residential to large-scale commercial and industrial systems.
Each drain features a precision-moulded rubber gasket that ensures a secure, leak-proof connection to standard pipework, maintaining seal integrity even under variable pressures and thermal movement.
Constructed from high-quality polypropylene (PP), the drain offers outstanding durability and resistance to UV radiation, frost, and temperature fluctuations. Its robust clamp ring design allows the roofing membrane to be securely fastened to the drain body, forming a watertight seal and preventing uplift or water ingress.
Designed for both new construction and refurbishment projects, the Kisner KADS Vertical Clamp Ring Drain delivers dependable performance and a professional finish for all types of vertical drainage systems.
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 |
Designed for vertical roof drainage systems
Compatible with PVC, HDPE, and cast-iron pipes
May be used with EPDM membranes or other compatible waterproofing materials
Ensure all surfaces are clean and dry before sealing or bonding
Can be paired with Kisner KADS Leaf Guards for debris protection
Not suitable for horizontal or parapet applications (use Kisner KADS Parapet Drain)
Store in a cool, dry environment (5–25 °C) away from direct sunlight. Protect the drain body and clamp assembly from impact or deformation during transport and storage. If stored in cold conditions, allow the product to reach room temperature prior to installation.
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.
