Technical Information
Access product specifications, calculation tools, building regulations guidance, and BS EN standards compliance data for all Kalsi building product systems.
Product Specifications
Detailed technical data sheets for all product ranges including material properties, dimensions, weight per metre, and performance data.
- Rainwater system specifications (112mm, deep-flow, ogee)
- Underground drainage technical data (110mm, 160mm)
- Soil & waste system specs (push-fit and solvent weld)
- Roofline product datasheets (fascia, soffit, cladding)
- Wall panelling specifications
- MDPE pipe technical data
Load & Flow Calculations
Engineering tools and reference tables for specifying the correct products for your project requirements.
- BS EN 12056-3 rainwater flow calculator
- Gutter capacity reference tables by profile
- Drainage gradient calculation guidance
- Roof area computation guides
- Wind loading for external cladding
Building Regulations
Guidance on compliance with Building Regulations Part H (Drainage and Waste Disposal) and relevant British/European Standards.
- Approved Document H drainage compliance
- BS EN 12200 rainwater guidance
- BS EN 1401 underground drainage systems
- BS EN 1329 soil & waste pipe compliance
- Approved Document C ventilation requirements
Compatibility Guides
Cross-reference guides for component compatibility across different Kalsi product systems and ranges.
- Rainwater cross-system compatibility matrix
- Push-fit vs solvent weld selection guide
- Colour matching reference across ranges
- Fitting selection guide by application
- Jointing method comparison
Key Technical Documents
Essential reference documents for specifiers and installers.
Chemical Resistance Guide
Comprehensive A–Z PVC-U chemical compatibility list per BS CP 312: Part 1. Covers acids, alkalis, halogens, and organic substances.
Download PDFRAL Colour Guide
Complete RAL colour reference for all product ranges: Aquacel Foam (12 colours), Aquaflow Rainwater (6), Underground (2), Soil & Waste (3), K-Blue MDPE (3).
Download PDFPOE Oil Warning
Important safety notice: Polyol Ester (POE) oil from refrigeration compressors causes Environmental Stress Cracking in PVC and ABS pipes.
Download AdvisoryStandards Quick Reference
Key British and European standards applicable to our product ranges.
BS EN 12200-1
Plastics rainwater piping systems
RainwaterBS EN 1401-1
Underground drainage & sewerage
DrainageBS EN 1329-1
Soil and waste discharge systems
Soil & WasteBS EN 12201
PE water supply systems
MDPEBS EN 1452
PVC-U piping systems — fittings
FittingsBS EN 14915
Solid wood panelling and cladding
CladdingNeed Bespoke Technical Support?
Our in-house engineering team can provide bespoke calculations, product selection advice, and specification support for complex projects. Get in touch.