PVC Schedule 40 Pipe is dual marked and can be used in DWV and pressure applications. Gradual sloping fittings are used for DWV applications. Sharply angled pressure fittings must be used for pressure. PVC Schedule 40 is highly durable, with high tensile and impact strength. It is easy to install and has better sound deadening qualities than PVC Schedule 40 Foam Core and ABS Foam Core. Installation requires the use of primer and solvent cement. Charlotte Pipe products are manufactured in the USA.