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Secondary Drainage Solutions from Shelton

Often supplementary to the primary drainage network, secondary drainage systems are installed at 90-degrees to the main pipes below and incorporate a network of drainage slits, or drainage bands, into the upper soil structure. These are closely spaced allowing any excess surface water to drain away much faster.

Four systems are available:

  • Slit drains: Sometimes called sand slits, 50mm wide.
  • Shelton System 25™ Micro trenches 25mm wide backfilled with gravel.
  • Shelton System 25™ Micro trenches 35mm wide with 25mm land drainage pipe backfilled with gravel
  • Shelton Gravel Band Drainage: Micro bands of gravel 25mm wide.

Slit drains may be 250-300mm deep, spaced at 1, 2 or 3 metre centres and are excavated with either the Shelton Supertrencher or the Shelton System 25™. They are backfilled with 6-10mm gravel and topped up with coarse free-draining sand. On certain soil types they may need re-topping after settlement.

The Shelton System 25™ consists of 25mm wide trenches, usually 250-300mm deep, spaced more closely, which are simultaneously filled with small gravel in a single operation. The surface remains level and the scars in the turf grow over in a matter of days. Minimal surface disturbance makes this system highly attractive, especially for golf green drainage.

Finally, Gravel Band Drainage is a simple system of narrow slits filled with gravel, which is now widely accepted as the most cost effective way to install an intensive drainage system into established sportsturf.

Please contact us today to discuss your specific requirements.

Shelton Supertrencher

Secondary Drainage System

Golf Green Drainage

drainage specialists
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