What PEX pipe dimensions are available?
The dimensions of the pipes are given in the following tables. The plastics industry generally follows the recommended external diameters specified in ISO 161. However there are some exceptions such as pipe produced to BS 7291 and in Eire to IAB standards. Most manufacturers will supply a pipe system complete with appropriate fittings or recommend fittings to be used. Although the majority of PE-X pipes are produced in the smaller diameter range of 12 mm to 63 mm for Hot & Cold water applications, large diameter pipes of up to around 450 mm have been produced. Developing technology will no doubt lead to an increase in the diameter range if the demand arises. For the determination of the dimensions, the methods specified in ISO 3126 are usually followed.
