Fittings with threads in acc. with DINEN 10226, Part 1, certified for drinking water in acc. with DIN 1988 and gas installations in acc. with TRGI 2008 (observe notes on the model), tested in acc. with DVGW worksheet GW 6 and GW 393.CertificatesGunmetal threaded fittings - DVGW-Reg.-No. DV-7401AO2957Threaded connectionsR-external thread, produced on site - hempen without roughening of the thread is possible.
