... and DN100, including GB 1 and GB 2.GB 1 series is same size as DVGW W534:1995, ... 42, 54, 76.1, 88.9, 108mm.GB 2 series is same size as JIS G 3448-1997, out ... and cold water, sanitary air and compressed gas. Option 2. EPDM(Ethylene-Propylene-Diene Monomer) : Sanitary for human ... prefer? Advantages of Press Fitting Pipeline:(1). Corrosion-resistant: (2). Long Service Life: (3). Easy Installation: (4). ...