Press connector system with press connectors made of gunmetal or silicon bronze*, pipes made of stainless steel material No. 1.4401 and 1.4521 according to DIN EN 10088, DIN EN 10312, DVGW worksheet GW 541, system approval for connectors and pipes in acc. with DVGW worksheet534, for potable water installations in acc. with DIN 1988. For dimensionally stable concealed and pre-​wall installations of manifold and riser pipes in Viega component assembly.

Press connectors
All sizes with SC‑Contur – accidently unpressed connections become visible during filling the system. The SC‑Contur is certified and fulfils the requirements of the DVGW worksheet534, point 12.14, Connectors with forced leakage.
During leakage tests with water Viega guarantees the identification of unpressed connections in the pressure range 0.1 MPa–0.65 MPa, in the case of dry leakage tests with compressed air or noble gases from 22 hPa–0.3 MPa.

Green dot on the press connection

Sealing elements
EPDM, black (ethylene-​propylene-​diene-​monomer rubber); up to 110 °C; not resistant against hydrocarbon solvent, chlorinated hydrocarbon solvents, turpentine, petrol

Stainless steel laser-​welded and made of corrosion-​proof stainless steel
  • Material number 1.4401 (AISI 316L) (X5CrNiMo 17‑12-2), with 2.3 % molybdenum for increased durability; yellow plugs
  • Material number 1.4521 (AISI 444) (X2CrMoTi 18‑2), with PRE value 24.1; green plugs

Press connector materials
Gunmetal: CC 499K
Silicon bronze*: CC 246E / CuSi4Zn9MnP
(both in acc. with UBA list dated 15th March 2017)

Standard sizes: d 12; 15; 18; 22; 28; 35; 42; 54
XL sizes: d 76.1; 88.9; 108.0

Areas of application
Potable water
Compressed air systems

Special applications

The use of the system for other than those described areas of application and media must be approved by the Viega Service Center.

Operating conditions
Potable water installations
  • Potable water without restrictions in acc. with DWO
  • Operating temperature max. 8°C
  • Operating pressure max. 1.6 MPa
Heating installations
  • Operating temperature max. 110 °C
  • Operating pressure max. 1.6 MPa
Irrelevant of the direction of flow, mixed installations are permitted.

The stainless steel pipes should be protected against high concentrations of chloride generated by both the medium and by external factors.

Pipes 1.4521 (d 12–108.0)
  • DW-7301BS0375
Pipes 1.4401 (d 12–108.0)
  • DV-7301BS0411
Sytem with pipe 1.4521 (d 12–108.0)
  • DW-8501BS0377
System with pipe 1.4401 (d 12–108.0)
  • DW-8501AP3032

Use of press tools
The functional safety of the Viega press connector systems primarily depends on the perfect condition of the press tools and press machines used. For this reason, for the production of press connections we recommend the use of Viega press tools and their regular inspection by authorised service points.

Technical data
Press connectors and components are constantly being optimised. If required, the current Z and installation dimensions can be obtained from the download area of the Viega homepage:

*) Change of material due to the current switch of production from gunmetal to the Viega worldwide uniform silicon bronze alloy
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Z-dimensions  (1)
Declarations of performance  (1)
Application technology  (2)
Brochure  (1)