Made in accordance with the applicable rules and low no. 46 of 5th March 1990and Presidential Decree no. 1095 dated 3rd August 1968, it is an "ESENCOR" CU DHP copper alloy pipe complying with European Standard EN 1057 - annealed in coils and phosphorous-deoxidised, with minimum 99,9% copper content and 0,015 - 0,040% phosphorous, in compliance with UN1 5649/71 series B, heavy, bearing the marking "ESENCOR D x thickness EN 1057 CU DHP 99,9% SIM I 00".

Covered with an ivory polyvinyl chloride (PVC) sheath. It is non- toxic, odourless and free from chlomfluorocerbons (CFC) and bears the progressive marking "00 ISOCLfMA PVC D x thickness UNI Cig 7129 with ESENCOR copper pipe" as well as an indication of the date, time and production line for quality control purpose.