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 degF. 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.