charlotte pipe 1 sch 40 coupling sxs contractor pack pressure (10 unit bag) charlotte pipe pvc schedule 40 fitting that is for pressure systems where temperatures will not exceed 140° f. they are highly resilient, with high-tensile and high-impact strength. pvc schedule 40 has better sound deadening qualities than pvc schedule 40 dwv foam core and abs foam core. installation requires the use of primer and solvent cement. all charlotte pipe products are manufactured in the usa.