Dresser Style 501 products provide the ideal connection for those many transition points from metal pipe or piping components to P.E. service tubing. The Dresser family of Style 501 products includes Steel x P.E. reducing couplings, male adapters, ells, service tees and valves. Whether on new services from metallic mains or renewal services, making a connection at the main or service riser, or installing a valve, nearly all the necessary transitions can be made using the same compression end and following the same installation procedures.