Press connector system with press connectors made of silicon bronze, pipes made of stainless steel material Nos. 1.4401 and 1.4521 in acc. with EN 10088, EN 10312, DVGW worksheet GW 541, system certification for connectors and pipes in acc. with DVGW worksheet534, for drinking 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– connections, which remain unpressed become visible when the system is filled. The SC‑Contur is certified and fulfils the requirements of 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 1.0 bar -6.5 bar, in the case of a dry leakage test with compressed air or noble gases from 22 hPa–0.3 MPa.

Green dot on the press connection

Sealing elements
EPDM, black (ethylene-​propylene-​dien-​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-​No.1.4401 (AISI 316L) (X5CrNiMo 17‑12-2), with 2.3 % molybdenum for increased durability; yellow plugs
  • Material-​No.1.4521 (AISI 444) (X2CrMoTi 18‑2), with PRE-​value 24.1; green plugs

Standard sizes: d 12; 15; 18; 22; 28; 35; 42; 54 made of silicon bronze
XL sizes: d 76.1; 88.9; 108.0 made of silicon bronze
Press connectors with threaded connection made of silicon bronze

Areas of application
Drinking water
Compressed air system

Special applications

Use of the system for application areas and media other than those described here must be agreed with Viega Service Center through a material request.

Operating conditions
Drinking water installations
  • Drinking 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
  • WRAS Approval Number 1906080
Pipes 1.4401 (d 12–108.0)
  • DW-7301BS0411
  • WRAS Approval Number 1906080
System with pipe 1.4521 (d 12–108.0)
  • DW-8501BS0377
  • WRAS Approval Number 1906080
System with pipe 1.4401 (d 12–108.0)
  • DW-8501AP3032
  • WRAS Approval Number 1906080

Use of press tools
The functional safety of the Viega press connector systems is primarily dependent 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 website:
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Z-dimensions  (1)