PERT undergrand heating pipe:German and ISO standard 2.healthy and ... years PRODUCTS:PPR PIPE FITTING, ppr pipes, pp-r fittings, PERT-AL-PPR Pipes, PPR-AL-PPR Pipes, PE-RT-PPR ... , BUTT-WELDED PPR Pipes,S-S-PPR PIPES. Features of PERT undergrand heating pipe1.Raw material: PERT2.Healthy and non-toxic ...