Filter Drains
Also referred to as French Drains, Filter Drains are shallow linear trenches filled with granular filter material. They can be used to create temporary subsurface storage for the attenuation, conveyance and filtration of surface water run-off – usually receiving lateral inflow from an adjacent impermeable surface that has been pre-treated via a filter strip.
| Description | File | |
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| Ridgichute |
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| Installation Stubs |
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| Ridgitreat |
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| Ridgigully |
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| Midigully |
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| Ridgidrain Inspection Chambers |
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| Ridgidrain |
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| Landcoil |
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| Landcoil Couplers |
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| Linflex |
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| Polystorm |
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| Permavoid 150mm |
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| Permavoid Biomat |
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| Permavoid Geomembrane |
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| Permavoid Medium Duty with Biomat |
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| Permaceptor |
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| Permachannel |
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| Permafilter Geotextile |
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| Permafoam |
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| Permavoid Permatex 300 |
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| Permaties & Shear Connectors |
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| Permavoid System Components |
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| Drawing Number | Title | File |
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| GI-PSM-SD-FILTERDRAIN | ALTERNATIVE FILTER DRAIN (INC POLYSTORM CONDUIT/ STORAGE) |
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| GI-SUD-SD-FILTERDRAIN | TYPICAL FILTER DRAIN |
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| FD-SD-001-REV-A | RIDGITREAT USED IN FRENCH DRAIN APPLICATIONS |
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| Description | File | |
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| Permavoid Performance Specification |
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| Permavoid NBS Specification |
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| Ridgidrain Performance Specification |
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| Ridgidrain NBS Specification |
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| Polystorm Performance Specification |
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| Polystorm NBS Specification |
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| Description | File | |
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| Polystorm Technical Manual |
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| Permavoid Technical Manual |
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| Description | File | |
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| Polystorm BBA Certificate |
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| Ridgistorm-XL BBA Certificate |
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| Title | File | |
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| Oil Retaining and Treating Geotextile for Pavement Applications |
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