Spears 88 Series PVC Pipe Fitting, Nipple, Schedule 80, Gray, 3/4" NPT Male, 4" Length Nipple fitting for connecting two threaded pipes Male NPT threads on both ends for connecting pipes with female NPT threaded ends PVC for chemical and corrosion resistance, high strength, and less weight than fittings made from metal Maximum operating temperature of 140 degrees F Meets ASTM D1784 and D2467 standards for quality assurance, and certified by NSF International for potable water service