The listing is to UL 1821, Thermoplastic Sprinkler Pipe and Fittings for Fire Protection Service It approves (with certain limitations) the use of flexible AquaPEX tubing and ProPEX expansion fittings ...
HOLLISTON, MASS. — FlexHead Industries has filed patent infringement lawsuits against eight defendants, charging them with infringing on its patents to attached flexible fire sprinkler connections to ...
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