What is the purpose of the brick chips?
The purpose of the brick chips is to protect the iron nails from spreading due to the force of the incoming water. Ideal size of the brick chips is 10 cm diameter. Brick chips should completely cover the iron nails in the basin. Alternatively, big stones or any perforated plate made with wood, plastic, or metal can be used in place of brick chips as long as the plate can protect the underlying iron nails.