Dark Valve 1>Material:PPR,Brass ,Stainess Steel,zinc alloy 2 ... 25,32 3>Certification:ISO9001-2008,CE PPR Pipe Fitting Dark Valve 1>Material:PPR,Brass ,Stainess Steel,zinc alloy2>Size ... transport by the pipes can reach 95 C when working under the long term consecutive working stressheat preservation and energy saving ... long: its working life can reach at least 50 years under normal use. dark-Valve/ppr Fine ...