Question

Can you point out the special features of their drainage system?

Answer 1

1. They had well-covered drains. The drains were covered with slabs or bricks.
2. Each drain had a gentle slope, so that water could flow.
3. Manholes were provided at regular intervals to clear the drains.
4. House drains passed below many lanes before finally emptying into the drains.
5. Every house had its own soak pit, which collected all the sediments and allowed only the water to flow into the street drain.