Casing Pipes are most commonly used underground to protect utility lines from being damaged by mud, overburden soil and rocks. Inside the casing pipes is the main water line that supplies water up to the surface. Casing Pipes are often used with or without screened slots. These small rectangular slots help retain the mud and sand filtered water in the water pipes. The slot dimensions are 4” long and 2 mm thickness. Slots can be cut on Casing Pipes and supplied at an extra cost.