... and plastic pipe, overcome the shortcomings-heat expansion of PP-R, PE, PB, PE-X pipes Features1, For hot and cold ... ;3, Easy installation: hot melt connection, never leakage;4, Good insulation: thermal conductivity coefficient;5, Low expansion: expansion close to the ... pipe dn20mm25mm32mmthickness of outer ppr2.8mm3.5mm4.4mm copper PP-R composite pipe