PVC Well Casing is primarily used to line wells for drinking water. Like other PVC piping systems, it is intended for applications where temperatures will not exceed 140°F. PVC well casing is triple-marked pipe and can be used in well, DWV and pressure applications. PVC Well Casing is a robust piping material designed and tested to withstand the collapsing pressure associated with underground well installation. It is non-toxic, and will not leach chemicals into the water supply. Charlotte Pipe products are manufactured in the USA.