PVC pipes are the best option for most drainage projects due to their strength, durability, and corrosion resistance. They are also relatively inexpensive and easy to install. PVC pipes are strong enough to withstand the weight of soil and water and are not easily damaged by roots or debris. They are also resistant to corrosion from water, chemicals, and other elements, making them ideal for harsh weather conditions or exposure to chemicals. Additionally, PVC pipes are cost-effective and easy to install, as they can be joined with various fittings and buried in the ground without special preparation.