Materials The material used in the manufacture of pipe, fittings and valves shall be a specialty, virgin, low-extractable rigid polyvinyl chloride (PVC) compound (Harvel LXT®), with a Cell Classification of 12343 per ASTM D1784. This specialty compound shall be translucent blue in color, and shall be approved by NSF International for use with potable water (NSF Standard 61). All Harvel LXT® raw material utilized for the production of pipe shall be procured, packaged, handled and stored utilizing controlled procedures to reduce the potential for external contamination. A record of each material lot shall be maintained for material identification and tracking. This material shall not contain lead stabilizers.