As a successful manufacturer, Peštan company strives to the good quality of their products and then the documents that confirm this. It is always important for us to have a professional approach in accordance with the rules of each market in which the company operates. Accordingly, the company has obtained a new INSTA-CERT certification for PP  corrugated DN 600 pipes. You can view or download this certificate on our PP Corrugated Pipes page in download section .