Approvals, notices and certifications
| Technical notice, PVC pipes Sewerage 3530 |  |
| Technical notice, PVC pipes Sewerage 3531 | |
| Technical approval Oltgrup 3530 Multilayer PVC | |
| Technical approval Oltgrup 3531 Compact PVC | |
| Certificat de calitate ISO 9001 | |
| Quality certificate ISO 14001 | |
| Quality certificate ISO 18001 | |