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Prestabo LF


Press connector system (labs-​free) with press connectors and pipe made of non-​alloy steel 1.0308 (235), in acc. with DIN EN 10305‑3, externally galvanised with a zinc layer thickness of 8–15 µm (blue chromated)

The press connector system Prestabo LF is free from paint wetting destructive substances (labs) as silicone, fat, oil etc. and is therefore especially suitable for the use of pipe installations in paint shops.

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    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 worksheet W 534, 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.

    Blue/red dot on the press connection
    Red symbol (to prevent confusion with Sanpress Inox (stainless steel) articles) »Not for potable water installations«

    Prestabo LF

    Sealing elements

    Standard sizes: d 15; 18; 22; 28; 35; 42; 54
    XL sizes: 64.0; 76.1; 88.9; 108.0

    Prestabo system pipe versions
    • System pipe made of non-​alloy steel with the material number 1.0308 (E235), in acc. with DIN EN 10305‑3 externally galvanised.
    • System pipe made of non-​alloy steel with the material number 1.0215 (E220), in acc. with DIN EN 10305‑3 internally and externally galvanised.

    Areas of application
    Heating systems
    Industrial and plant engineering
    Sprinkler units (sendzimir galvanised pipe)
    Compressed air units (sendzimir galvanised pipe)
    Solar installations
    Cooling water pipelines

    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 with EPDM sealing element
    • Operating temperature max. 110 °C
    • Operating pressure max. 1.6 MPa (PN16)

    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:

    Storage and transport
    To ensure the impeccable quality of Prestabo steel pipes, the following points should be observed during transport and storage:
    • Packing and protective foil (on with PP coated pipes) should not be removed until immediately before use.
    • The pipe ends must be closed with protective caps when delivered.
    • Do not store the pipes directly on the bare floor.
    • Do not stick any protective foils or plastics to the pipe surfaces.
    • When loading and unloading, do not pull the steel pipes over the truck sill.

    Protection against external corrosion
    Prestabo pipes and connectors are protected by external galvanisation. In case of contact with dampness (condensation, precipitation during the construction phase, plaster and splash water etc.) or corrosive building materials (surfacer, levelling screed etc.), however this layer of zinc cannot provide permanent protection against external corrosion. The following protective measures are recommended:
    • Use of closed-​cell insulating tubes with professional sealing of all abutting and cut edges using a suitable filler.
    • Damp-​proofing of the laid pipe through separating foil in the floor construction.
    • Installing pipes outside areas at risk of moisture.
    • Visible radiator connections rising from the floors should be avoided if floors will be frequently cleaned with water and/or cleaning agents/disinfectants, for example in retirement homes and care homes as well as hospitals. Wall connections make cleaning easier and also exclude any additional risk of corrosion.
    • If the radiator connections do come from the floor, professional corrosion protection and professional sealing of the joints must be ensured. If not, there is a possibility that the cleaning water will penetrate, which will moisten the insulation and present the risk of corrosion.

    If the measures in the examples above fail to provide permanent protection against dampness or the areas of use are connected with special requirements, e.g. in cooling circuits, complete external corrosion protection, which reliably prevents influences that lead to corrosion must be applied.

    Further detailed information and examples of use can be found in the practical handbook and on the internet.
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