Spears 8171 Series PVC Bulkhead Tank Adapter, Schedule 80, Gray, 1-1/4" Socket x NPT Female Bulkhead tank adapter for adapting drums or tanks for drainage, filling, or distribution applications Female NPT threads on one end and socket opening on the other for connecting two pipes PVC for strength and resistance to chemicals and corrosion, and a neoprene gasket for resistance to weathering, oil, and heat 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