Sump Grates
Drain water, keep debris out.
Durable sump grates cover chamber sumps to let water drain away while trapping debris — modular for easy integration with existing chamber infrastructure.

At a glance
| Specification | Value |
|---|---|
| Material | Ductile iron / composite |
| Sizes | Modular, standard chamber |
| Drainage | Free-draining, debris retaining |
| Retrofit | Yes |
- UK WarehousedSame-week dispatch
- In-house engineersTechnical specs & support
- End-to-end BOM fulfilmentKitted, staged, delivered
- 120+ network buildersTrust Altnets to deliver
Key features
Built for how it gets installed.
Sump Grates is one of the 11 cable types we carry across our Access Chambers range — chosen for the way you actually deploy.
Debris retention with free drainage
Durable, long-life materials
Modular, scalable sizes
Retrofits to existing chambers
Why Altnets
The clever choice for network builders.
Deep UK stock
300,000+ sqft of warehousing and 4,000+ pallet positions — same-week dispatch on most line items.
Engineers, not order-takers
In-house technical team to validate specs, propose alternatives and de-risk your build before it ships.
BOM, kitted & staged
Multi-vendor consolidation, phased deliveries and project staging built into every order.
UK & worldwide reach
Air, sea and road freight with full export documentation and flexible incoterms for global rollouts.
Applications
Where sump grates earns its keep.
Trackside drainage chambers
Inspection chambers
Sediment collection points
Highways drainage
Have a question?
Let's get your network moving.
Tell us what you're building. We'll come back with a quote, lead times, and a plan.
- [email protected]
- +44 (0) 20 3997 8994
- Brighton · United Kingdom
More Access Chambers
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Secure chamber access, footway to heavy traffic.

Ring Sections
Stackable rings for variable depth.

Furniture Kits
Cable management, steps and duct entry.

Mobra Arms
Cable support inside the chamber.
D400
D400 covers for trafficked areas.
MOBRAs
Adjustable frames that stabilise the chamber.
Mounting Kit
Fix equipment securely inside the chamber.
Steps
Safe, anti-slip entry into the chamber.
Support Kit 1A
Structural reinforcement for chamber walls.
Toby Boxes (Plastic)
Compact housings for underground assets.