Viega Tap Extension Red Brass 3/4″ × 50 mm — Art. 357252

It is a tap/valve extension nipple used to extend the threaded projection of a 3/4" valve or fitting — for instance, when a valve sits flush with or behind a wall, or when the existing thread stub is too short to accept the required connection. The tapered male end screws into the valve; the female end accepts the pipe fitting.

Yes. The 357252 carries DVGW certification (DV 7401 AO 2957), confirming compliance with German standards for both drinking water installations (DIN 1988) and gas installations (TRGI 2008). It is suitable for potable water systems without restriction.

Red brass (Rotguss) is a copper-tin-zinc-lead alloy that resists dezincification — the leaching of zinc that weakens standard yellow brass in soft or aggressive water. This makes it the preferred material for fittings in contact with drinking water over long service lives.