450mm Inspection Chamber Base 5 Adjustable Inlets
Nationwide Delivery
Wed 24 Jun
- 0days
- 4hrs
- 21mins
- 20secs
Nationwide Delivery
Wed 24 Jun
- 0days
- 4hrs
- 21mins
- 20secs
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Delivery & Returns Information
Delivery charges vary by product category and order value. Items may ship from different suppliers and arrive separately, so delivery charges can be shown per part of your order at checkout.
Standard (Nationwide) Delivery
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £25 ex. VAT |
| Over £300 ex. VAT | FREE |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £90 ex. VAT |
| Over £400 ex. VAT | £55 ex. VAT |
| Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £50 ex. VAT |
| Over £300 ex. VAT | £35 ex. VAT |
How delivery works
We work with a nationwide network of trusted suppliers. Items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you will see delivery charges shown at checkout for each part of your order. We always aim to group products from the same supplier to keep delivery costs as low as possible.
Delivery areas
Delivery charges apply to mainland UK, excluding: AB, CA, CF, DD, DG, EH, EX, FK, KA, KW, KY, IV, LA, LD, LL, ML, NP, PA, PH, PL, SA, SY, TR, TQ and TD.
If your address is in one of these areas, we will contact you before processing your order to confirm any additional costs. We do not currently offer delivery outside the UK mainland.
What to expect on delivery day
- Deliveries are typically kerbside.
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- Many building materials arrive on large vehicles. If access is restricted, a specialist vehicle such as a HIAB may be required and could incur an additional charge.
Why delivery can cost more than typical parcel delivery
Building materials often travel on larger vehicles and usually carry fewer drops per run than parcel networks. That is why delivery charges can be higher than standard e-commerce shipping.
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Returns depend on what you have bought and whether there is anything wrong with it. For full details on eligibility, timeframes, and exclusions, please see our full policy.
Key Features
- {{mediation}} Five adjustable inlets - multiple pipework configuration options
- {{hvac}} For reliable access and maintenance
- {{route}} Suitable for both foul and surface water drainage systems
- {{filter_tilt_shift}} Compatible with standard 450mm risers
Technical Specification
| URN: | 7001405 |
|---|---|
| Product: | Base |
| Material Type: | PVC |
| Diameter: | 450mm |
| Sales Unit: | Each |
| Manufacturer's Reference: | D900 |
Product Overview
450mm inspection chamber base with multiple fixed inlets designed for use in underground drainage systems.
Developed to provide dependable access for inspection, maintenance, and rodding of foul and surface water pipework, this larger base size is suited to both domestic and light commercial installations.
Manufactured from high-strength, durable materials, the base delivers reliable long-term performance under load while maintaining watertight integrity. Its multiple inlets accommodate various pipe connection layouts, making it suitable for junctions, changes in direction, or complex drainage configurations.
Commonly used as a connection hub for pipework, the component allows several 110mm or 160mm pipes to converge at a single access point. It also serves as a transition between pipe gradients or levels, providing a chambered section that maintains flow performance across vertical changes.
In addition, the 450mm base may be installed as an intermediate access point between manholes, typically every 45 metres on straight drainage runs, offering a practical and economical solution for system maintenance.
The design integrates precisely with standard 450mm risers and covers, providing a secure, modular assembly that ensures straightforward installation and long-term operational reliability.
Features & Benefits
- High durability: Manufactured from robust, long-lasting material resistant to underground conditions.
- Multiple connections: Incorporates several fixed inlets for flexible drainage layouts.
- Enhanced accessibility: Larger 450mm chamber diameter provides improved access for rodding and inspection.
- Reliable performance: Suitable for both foul and surface water drainage systems.
- Easy integration: Compatible with standard 450mm risers and covers for a complete system.
Applications
- Underground drainage: Provides secure inspection access for foul and surface water systems.
- Domestic and mainline drainage: Suitable for larger underground systems requiring improved access.
- Light commercial works: Practical for small commercial drainage installations.
- Pipe junctions and changes: Commonly used where multiple pipes converge or directions change.
- Intermediate access: Installed between manholes to allow regular inspection points on long runs.
- Maintenance access: Enables safe and efficient inspection and cleaning of pipe runs.
Installation Guidance
- Excavation: Prepare base excavation to the required depth and footprint for 450mm component size.
- Bedding: Position on a level granular bedding to ensure stable placement and full support.
- Connection: Securely attach 110mm or 160mm inlet and outlet pipes using appropriate seals.
- Assembly: Fit with compatible 450mm risers and covers to achieve required chamber height.
- Backfilling: Surround with suitable granular material and compact in layers for stability.
- Handling: Use safe lifting techniques or mechanical aids where necessary due to component size.
Compliance & Performance
- Material standard: Manufactured in accordance with relevant drainage component standards.
- Load capacity: Designed to withstand higher ground loadings suitable for larger inspection points.
- System suitability: Approved for use in foul and surface water applications.
- Installation compliance: Meets Building Regulations for underground drainage access and maintenance.
