UPVC Drainage Pipes BS EN 1401-1 (BS 4660 & BS 5481)
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Underground drainage pipes certified to BS EN 1401-1 (supersedes BS 4660 & BS 5481).
Standards & Certifications
Overview
Product introduction and key characteristics
Crown Plastic Pipes / Fittings, a trusted supplier in Dubai and Abu Dhabi, produces a full range of UPVC underground drainage pipes conforming to BS EN 1401-1, the European standard that supersedes both BS 4660 and BS 5481. Manufactured from 100% virgin PVC-U compound with high ring stiffness at our ISO 9001:2015 certified facility in Umm Al Quwain, these orange-coloured pipes are purpose-built for underground sewerage, foul water, and stormwater networks. Available in sizes from 3″ to 12″, they offer long-term structural integrity under the varying soil and traffic loading conditions found across the UAE and GCC.
Features
Technical advantages and key benefits of this product range
- Conforms to BS EN 1401-1 (supersedes BS 4660 & BS 5481)
- High ring stiffness for underground loading resistance
- Root-resistant construction prevents infiltration
- Chemical and corrosion resistant — ideal for aggressive soils
- Orange colour coding for underground identification
- Ring-seal joints ensure watertight connections
- ISO 9001:2015 certified production
- 50+ year expected service life
Applications
Ideal use cases and industries for this product
- Underground sewerage systems
- Stormwater drainage networks
- Foul water drainage
- Building-to-sewer connections
- Highway and road drainage
- Property sewer laterals
- Industrial effluent disposal
- Municipal infrastructure projects
Pipe Specifications
Technical dimensions and parameters for all pipe sizes
Underground Drainage & Sewerage: BS EN 1401-1 (BS 4660 & BS 5481)
| Nominal Size (Inch) | Mean Outside Dia. (mm) | Mean Wall Thickness (mm) | ||
|---|---|---|---|---|
| Min | Max | Min | Max | |
| 3" | 82.00 | 82.35 | 3.2 | 3.5 |
| 4" | 110.00 | 110.32 | 3.2 | 3.8 |
| 6" | 160.00 | 160.45 | 4.0 | 4.8 |
| 8" | 200.00 | 200.65 | 4.9 | 5.9 |
| 10" | 250.00 | 250.75 | 6.1 | 7.5 |
| 12" | 315.00 | 315.90 | 7.7 | 8.8 |
Installation Guidelines
Best practices for optimal performance and longevity
Do's
- ✓Ensure proper bedding and backfill for underground pipes
- ✓Use ring-seal joints with correct lubricant
- ✓Follow minimum cover depth requirements
- ✓Compact backfill in layers to avoid pipe damage
Don'ts
- ✗Do not install without proper granular bedding
- ✗Do not backfill with large stones or sharp debris
- ✗Do not expose orange underground pipes above ground permanently
- ✗Do not connect directly to pressure systems
Technical FAQs
Answers to common questions about this product
- Conforms to BS EN 1401-1 (supersedes BS 4660 & BS 5481)
- High ring stiffness for underground loading resistance
- Root-resistant construction prevents infiltration
- Chemical and corrosion resistant — ideal for aggressive soils
- Orange colour coding for underground identification
- Ring-seal joints ensure watertight connections
- ISO 9001:2015 certified production
- 50+ year expected service life
- Ensure proper bedding and backfill for underground pipes
- Use ring-seal joints with correct lubricant
- Follow minimum cover depth requirements
- Compact backfill in layers to avoid pipe damage
- Do not install without proper granular bedding
- Do not backfill with large stones or sharp debris
- Do not expose orange underground pipes above ground permanently
- Do not connect directly to pressure systems
Technical Documents
Access comprehensive technical catalogues, dimensional specifications, and compliance documentation for UPVC Drainage Pipes BS EN 1401-1 (BS 4660 & BS 5481).
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