Commercial Application
For attenuation the Naylor MetroCell units should be laid in a specified location, surrounded in a thick, strong and flexible fully welded geomembrane with a geotextile protective fleece on each side of the membrane.

The objective is for the surface water to be stored and released at a controlled rate by either an orifice plate or a vortex control unit after the first flush of the storm has passed.

	Naylor MetroCell Units - Volume of water stored (refer to designer's recommendations)
	Geotextile - Protective inner wrap (used to protect geomembrane)
	Minimum 1mm geomembrane (heat welded) - seek qualified installation advice
	Geotextile - Protective outer wrap (used to protect geomembrane)
	Air vent - 1 x 110mm vent pipe required per 7,500m2 of drainage
	Outlet chamber unit - complete with flow control unit (attenuation only)
	Naylor Clay, Twinwall or plastic drainage pipes and fittings
	Silt Trap
	Drainage Inspection Chamber
	Grass Protection Plates