Products control and testing are performed in the production halls and our lab in accordance with the prescribed international standards such as:

Dimensions	EN ISO 3126
Initial specific stiffness	ISO 7685, EN 1228
Resistance to initial ring deformation	ISO 10466
Initial longitudinal tensile properties	ISO 8513, EN 1393
Initial hoop tensile strength	ISO 8521, EN 1394
Determination of tensile properties	EN ISO 527-1, 527-4, 527-5
Determination of bending properties	EN ISO 178
Hardness	EN 59, ASTM D 2583
Glass and filler content	EN ISO 1172
Hydrotest	AWWA C 950
Leak tightness and resistance of flexible joints with elastomeric sealing gaskets	EN 1119, ISO 8639

The quality of our products is confirmed by continuous cooperation with renowned European institutes such as MFPA Leipzig GmbH, IRO GmbH, PIA GmbH, ZAG-Slovenian National Building and Civil Engineering Institute, IGH Institute, ZIK Institute, HZJZ – Croatian Institute of Public Health, TÜV Rheinland, IMS Institute, Serbian Public Health Institute, and many others.

The only true validation of quality is the satisfaction of our clients.