1. Why are PVC pipes preferred over iron pipes for water supply to homes and in sewer systems?

Answer:  PVC pipes are preferred over iron pipes because they are lightweight, easy to install, resistant to corrosion and rust, and do not react with water. Unlike iron pipes, PVC does not get damaged by moisture or chemicals commonly found in soil and water, making them more durable and cost-effective for long-term use in water supply and sewer systems.

2. Why are plastic sheets used for waterproofing ceilings, walls, basements, and swimming pools?

Answer: Plastic sheets are used for waterproofing because they are water-resistant, flexible, and durable. They form an effective barrier that prevents water from seeping through surfaces. Plastic is also resistant to rot, chemicals, and weathering, making it a reliable and long-lasting solution for protecting structures like ceilings, walls, basements, and swimming pools from water damage.