Anders O. Grevstad AS is a Norwegian installer at Nesttun, Vestland. It holds FG-910 Sprinklerforetak in the FG-Kontroll register for design, installation, inspection and maintenance, valid to 2027-06-28. Its certificate spans four or more of the FG roles, which is the full span the scheme offers: FG scopes an approval by role, so a firm may design without being approved to install, or inspect without either.