MODULAR STORMWATER STORAGE
NEPTUNE 250
ATTENUATION CRATE
Compact 250-litre modules with a 95% void ratio, internal load-bearing columns and open routes for inspection.
COMPACT FORMAT
Flexible tank footprints and depths
BALANCED LOADING
Internal columns transfer vertical loads
INSPECTABLE
Open routes between internal columns
95% VOID RATIO
Efficient stormwater storage volume
Maximum storage.
Minimum complexity.
The Neptune 250 is a compact modular crate for below-ground stormwater attenuation and infiltration
systems. Its 1,000 x 500 x 500 mm format supports adaptable tank layouts, while internal load-bearing
columns provide balanced load transfer through each assembled module.
A 95% void ratio maximises usable storage within the tank footprint. Inspection and CCTV routes remain
available between the internal columns, supporting coordinated access as part of the approved drainage
design.
Product Type: Modular stormwater crate
Assembled dimensions: 1,000 x 500 x 500 mm
Nominal gross volume: 250 litres
Void ratio: 95%
Internal structure:
Load-bearing column arrangement
Loading: HGV capable – design dependent
Tank entry: Via flange adaptor
Inspection route: Between internal columns
TYPICAL APPLICATIONS
- Stormwater attenuation tanks
- Sustainable Drainage Systems (SuDS)
- Residential and commercial developments
- Car parks, service yards and HGV areas
INTERNAL COLUMN LAYOUT
Plan view – 1,000 x 500 mm
Elevation – 1,000 x 500 mm