Key Products
Waterloc250 cell
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The new modular storage cell for infiltration and attenuation applications.
- Unique nesting ability of cells reduces storage on site and transportation costs
- Layers are quickly assembled by rotating alternate cells 180°
- Modular nature allows for maximum flexibility where space is restricted
- Exceptional vertical and lateral loading capability
- Open cell structure allows rapid dispersion of water
- Four Waterloc250 cells equal 1m3 making volume calculation straightforward
- BBA certification applied for
Physical properties
- 96% void ratio
- Pipe connectors in sizes up to 300mm
- Lightweight and easy to assemble
- Base plate used on base layer only for stability
| Standard Specification | |
| Colour | Black |
|---|---|
| Unit dimensions | Length: 1200mm Width: 800mm Depth: 290mm* |
| Weight | 12kg |
| Void ratio | 96% |
| Storage volume | 240 litres |
| Material | Polypropylene |
| Key performance criteria (cell only) | ||
| Property | Vertical loading on top face | Lateral loading on side face |
|---|---|---|
| Short term characteristic compressive strength | 350kN/m2 | 82kN/m2 |
| Short term load to cause 1mm deflection | 47kN/m2 | 7.1kN/m2 |
Flow control units

Vortex flow control units
Orifice plate flow control units
Used as part of an attenuation scheme, Flowloc controls the rate at which water is discharged to a surface water drain or watercourse.
The design of Flowloc is based on the proven vortex principle, and enables a near constant discharge rate to be set, independent of the head of water in the tank. An extensive range of orifice plate flow control units are also available for applications where very low flow rates are required or for higher flows where there is a less stringent requirement for controlling the water flow rate.
- Heavy duty aluminium flow controller and coupling system, fluoropolymer coated for long service life. Available to suit a wide range of flow rates.
- Supplied within a chamber base with an integrated filter providing protection against controller blockage
- Suitable for use with tank depths up to 4m
- All components readily removable from surface for ease of maintenance
- The chamber base is also suitable for installation within a conventional man entry inspection chamber if required
Flowloc Video Presentation
Flowloc is installed within a chamber base, which in operation is non-man entry. All the key components can be withdrawn from ground level for maintenance.
Please select a video clip from below:
Inspection & filtration
Filtration
Central to the function of any infiltration, attenuation or storage system is the protection of the cells and flow control components from the ingress of debris and silts.
For a smaller installation, a 250mm silt trap, UG60 can be installed upstream of the storage system.
For improved protection, the UG61 filter can be added, which will retain debris as small as 5mm.
Larger schemes benefit from a 600mm silt trap, USW30, which can be used with or without the USW29 filter which will remove debris particles down as small as 10mm.
The UG60, 250mm silt trap is suitable for catchment areas up to 250m2. For larger catchment areas, the 600mm silt trap, USW30 should be used.
Inlet/inspection chamber
The Marley inlet chamber provides access to the soakaway or attenuation scheme for inspection and cleaning. A column of cells is omitted beneath the chamber to provide an inspection well.
The chamber is seated into an adaptor tray (ordered separately). It can also be used as an inlet connection or connection for an air vent. For larger installations, multiple inlet chambers can be used, but must be bounded on all sides by cells.





