PERCOLATION / ABSORPTION PIT

Apercolation / absorption pit is a hand bore made in the soil with the help of an augur and filled up with pebbles and river sand on top. The depth of these pits will be anywhere between 4 and 8 meters depending on the nature of the soil. If the soil is clayey, the pit has to be dug to a depth till a reasonably sandy stratum is reached. The diameter of these pits will be 25 cm (10 inches). A square / circular collection chamber with silt arrester is provided at the top

Constructed in the open space at required intervals.

Size " 1m x 1m x 1.5m (depth)
Filled with broken bricks / pebbles
Suitable for sandy sub - soil area
One unit for 300 sq.ft area (approx.)

PERCOLATION PIT WITH BORE METHOD

A borehole to be drilled at the bottom of the percolation pit.Bore hole size : 150 - 300 mm dia with 10 -15 ft depth (approx.)Filled with broken bricks. Suitable for clay area.

Note :
1. Above structures are meant for area with small catchment like individual houses. 2. RCC slab cover is optional. 3. Top (1') portion may be filled with sand.

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