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Fiber Glass Systems I KOYPc roomd Pu cl*t1l'oonnft I u t i o In a <br /> October 10, 2016 <br /> RE: Compatibility of Red Thread"' IIA and Dualoy'" Piping Products <br /> To Whom It May Concern: <br /> NOV Fiber Glass Systems has been manufacturing high ly-engi neered fiberglass pipe for the <br /> fuel handling industry for almost 50 years, receiving our first Underwriters Laboratories (UL) <br /> listing in 1968. We currently have two product lines serving the Fuel Handling market: Red <br /> Thread IIA and Dualoy (3000/1- and 3000/LCX). This letter addresses compatibility with <br /> current and past product generations. <br /> Red Thread IIA <br /> The Red Thread IIA piping system has been manufactured since 1990. The system was UL <br /> listed for alcohol compatibility in 1990, and is UL-971 listed for all fuels and applications per <br /> UL Standard 971-2004. In addition, the materials are compatible with Ethanol, Methanol, <br /> and Biodiesel blended fuels,through 100 percent concentrations. <br /> Red Thread (manufactured and UL listed from 1968 to 1984) and Red Thread 11 <br /> (manufactured and UL listed from 1984 to 1990) are both compatible with all ethanol fuels <br /> up to 100 percent concentration. <br /> Dualoy 3000/1-&3000/LCX <br /> The Dualoy piping systems have been manufactured since 1971. The system was UL listed <br /> for alcohol compatibility in 1988, and is UL-971 listed for all fuels and applications per UL <br /> Standard 971-2004. In addition, the materials are compatible with Ethanol and Methanol <br /> blended fuels, through 100 percent concentrations, and Biodiesel blended fuels. <br /> Prior to 1988, UL did not offer a Listing for alcohol blended fuels, although legacy Dualoy <br /> products prior to the Listing were compatible with ethanol and all concentrations of ethanol <br /> blended fuels. <br /> If you have any questions or require additional information, please let us know. <br /> Respectfully yours, <br /> Josh Fowler <br /> Manager, Fuel Handling Sales <br /> T 210.477.7500 17115 San Pedro Ave. <br /> M 210.278.2220 Suite 200 <br /> nov.corn/fgs San Antonio,TX 78232 <br />