High-Capacity
Rainwater Management
Precision-engineered PVC-U systems designed for the UK climate. Featuring co-extruded high gloss finishes for superior durability and flow rates up to 6.0L/s.
Domestic & Commercial Systems
Select a profile to view components, dimensions, and flow calculations.
112mm Half Round
The classic choice for residential properties. Easy clip system with high-flow geometry.
114mm Square Line
Contemporary profile offering higher capacity than standard round systems. Ideal for new builds.
115mm Deepflow
Semi-elliptical profile designed for high flow rates. Reduces the number of downpipes required.
130mm Ogee Profile
A decorative, high-capacity system with traditional Victorian styling. Ideal for heritage renovations.
150mm Industrial
Heavy-duty system for large commercial buildings, warehouses, and agricultural applications.
Kalsi Cast Iron Style
Authentic cast iron aesthetics with the benefits of modern PVC-U. Architectural detailing on fittings.
Installed Across the UK
Our rainwater systems protecting real homes and commercial buildings.
Need Flow Rate Calculations?
Download our comprehensive Rainwater Technical Guide (PDF), including flow capacity charts for all gutter profiles and downpipe configurations.