Manufactured from a high strength polyethylene twinwall, making it strong and robust, the Silt Sentinel 300 Series Externsion Riser The silt sentinel 300 series is designed to support SuDS Management and the sewer infrastructure as part of a designed attenuation system, helpi... Read More
Manufactured from a high strength polyethylene twinwall, making it strong and robust, the Silt Sentinel 300 Series Externsion Riser
The silt sentinel 300 series is designed to support SuDS Management and the sewer infrastructure as part of a designed attenuation system, helping prevent flooding by limiting the amount that enters the attenuation system.
The invert can be increased on the unit by adding an extension riser and conversely can be trimmed down easily if you want to reduce the invert.
Recommended minimum depths of cover to the crown of gravity pipes without protection should be as follows:
Domestic gardens and pathways without any possibility of vehicular access: 350mm
Domestic driveways, parking areas and yards with height restrictions to prevent entry by vehicles with a gross vehicle weight in excess of 7.5 tonnes: 500mm
Domestic driveways, parking areas and narrow streets without footways with limited access for vehicles with a gross vehicle weight in excess of 7.5 tonnes: 900mm
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