Filter Drains - Technical Information

Geocellular products in filter drains 

In instances where the infiltration trench is only acting as a collector, provided appropriate flow controls are included downstream in the drainage system, consideration may also be given to increasing the potential attenuation storage provided by the infiltration trench.

This increase in attenuation storage can be achieved through either increasing the diameter of the pipe (oversize) installation at the trench invert, or substituting the pipe for a geocellular unit from our Polystorm product range. Where the units are used in a continuous installation along the trench, they would also behave as a conduit, with flows typically driven by hydraulic head.
 

Polypipe is able to offer a range of pre-fabricated chambers, designed to facilitating the simple inclusion of a range of flow controls in the drainage system.