1. ISO 9001,SGS certificate 2. Korea Hysong Raw materials 3. Different colors & range of diameters available 4. OEM accept PPR Pipe Fitting , Reduced Coupling/ / Adaptor / Socket1. a range of diameters, e.g.25/20mm, 32/20mm, 32/25mm, 50/20mm, 50/40mm,,160/110mm,etc.2. different colors available,e.g. green, white, gray 3. easy to install and long lifespanDESO PPR pipe system is made of High ...