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. Conforms to meet Standards: ASTM D 1784, ASTM D 1785, ASTM D 2665 and NSF Standards 14 and 61White pipe used in sanitary drain, waste, and vent (DWV), sewer and storm drainage applicationsIntended for pressure usePVC Schedule 40 White pipe with red print that is Dual Marked for DWV and Pressure ApplicationsPVC Schedule 40 Pipe is used in irrigation, underground sprinkler systems, swim pools, outdoor applications and cold water supply lines