coupling union, union,ppr union,pp-r union,ppr union,ppr pipe fitting,pipe fitting,ppr,pp-r coupling union, union,ppr union,pp-r union,ppr union,ppr pipe fitting,pipe fitting,ppr,pp-rModelSpecificationsAKPP325-2020mmAKPP325-2525mmAKPP325-3232mmAKPP325-4040mmAKPP325-5050mmAKPP325-6363mm