Viega Sanpress Inox Press Reducer 42×35 mm, Stainless Steel, Press, Art. 436339

The 35 mm press end takes Viega system pipe of that outside diameter, made of stainless steel 1.4401 or 1.4521. The 42 mm plug-in end does not take pipe: it goes into the socket of a 42 mm Sanpress Inox tee, elbow or coupling and is fixed when that socket is pressed.

You need Sanpress Inox jaws in two sizes: 35 mm for the reducer's press end and 42 mm for the socket that takes the plug-in end. Viega's instructions give a minimum distance between pressings made with jaws of 10 mm at the 35 mm size and 15 mm at 42 mm. Tools are not included.

Thanks to SC-Contur, the 35 mm press end is not tight until it has been pressed, so a missed joint shows itself by leaking in the leak test. Viega confirms this for wet testing at 1.0–6.5 bar and for dry testing from 22 mbar to 3.0 bar. The joint at the 42 mm end depends on the socket of the receiving fitting.