Land containing perforated pipes through which the water infiltrates the ground.
perforated pipe
Perforated pipe through which water drains in order to filter through the gravel and then into the soil.
distribution box
Device spreading water evenly through the network of drains.
gravel
Bed of small stones absorbing smaller particles found in water to prevent them from blocking the perforated pipes; it also keeps the perforated pipes in place.
tank
Wastewater settles and sewage decomposes naturally in the first compartment. Water then flows into the second compartment.
building sewer
Drainpipe carrying wastewater from the waste stack to the sewage system or septic tank.
