Once again, though, I will say i don't know how big a problem this is for an intake, but that all intake manufacureres, AFAIK, use either ABS or a metal, not PVC.A highly irritating, greenish-yellow gaseous halogen, capable of combining with nearly all other elements, produced principally by electrolysis of sodium chloride and used widely to purify water, as a disinfectant and bleaching agent, and in the manufacture of many important compounds including chloroform and carbon tetrachloride.