Press systems · Viega Temponox
Viega Temponox: stainless steel for heating and cooling – 15 to 108 mm
Temponox is the stainless steel system for the closed circuit: press connectors in 1.4301 on a ferritic system pipe 1.4520, EPDM sealing element, SC-Contur, brown marking. It brings the corrosion resistance of stainless steel to heating, cooling, compressed air and technical gases – without the price of a drinking water approval that nobody needs there. This page explains pipe, sizes, availability, media, transitions and how it differs from Sanpress Inox, Prestabo and SANHA-Therm.
- Pipe
- Temponox system pipe 1.4520 (ferritic)
- Sizes
- 15–108 mm
- Connector
- Stainless steel 1.4301
- Sealing element
- EPDM (on-site change to FKM after consultation)
- Pressure / temperature
- Heating 16 bar / 105 °C · compressed air 16 bar / 60 °C
- Availability
- from stock
What Temponox is meant for – and what it is not
Closed heating and cooling installations in housing, commercial and industrial buildings: risers, floor distribution, boiler connection, chillers, plus oil-free compressed air and technical gases after the media list. Temponox is insensitive to external corrosion by moisture – unlike galvanised steel – and stays so from storage to the ceiling penetration. It is not meant for drinking water: connector and pipe carry the brown marking, the pipe 1.4520 has no DVGW drinking water approval. Whoever might later want to convert a line to drinking water takes Sanpress Inox.
How the joint works
As with all Viega metal systems with SC-Contur: cut to length, deburr, mark the insertion depth, push on, press – 15 to 54 mm with press jaw, 76.1 to 108 mm with press ring and hinged adapter jaw. Temponox uses the same Viega tools as Profipress, Sanpress and Sanpress Inox.
The press connector carries the SC-Contur: in the unpressed state the joint is necessarily leaking during the leak test (wet 1.0–6.5 bar, dry 22 mbar–3.0 bar). A forgotten press operation therefore shows up before the installation goes into operation – provided it is tested. How the principle works is explained on the overview page and under leak testing and SC-Contur.
Pipe, sizes and availability
The Temponox pipe in 1.4520 is a ferritic chromium steel: nickel-free, more economical than 1.4401, magnetic, with lower thermal expansion than austenitic stainless steel – an advantage for fixed and sliding points in the heating circuit. It is approved for Temponox only; Sanpress pipe 1.4401/1.4521 can be pressed with Temponox connectors, Profipress copper connectors on Temponox pipe only with a corrosion protection tape at the joint (media list). The table shows sizes and availability:
| Size | Outside ø (mm) | DN | Availability |
|---|---|---|---|
| 15 | 15 | 12 | in stock |
| 18 | 18 | 15 | in stock |
| 22 | 22 | 20 | in stock |
| 28 | 28 | 25 | in stock |
| 35 | 35 | 32 | in stock |
| 42 | 42 | 40 | in stock |
| 54 | 54 | 50 | in stock |
| 64 | 64 | 60 | available to order |
| 76.1 | 76.1 | 65 | available to order |
| 88.9 | 88.9 | 80 | available to order |
| 108 | 108 | 100 | available to order |
The standard names dimensions. What is listed here, we carry – from stock or to order; how quickly something is available we clarify on request. From stock: elbows, tees, reducers, couplings, flanged and threaded transitions – shop category fittings/stainless steel.
Which medium with which sealing element
Assignment after the Viega media list (11/2025): heating water to DIN EN 12828 up to 105 °C / 16 bar, cooling water with antifreeze agents per product approval, oil-free compressed air (residual oil below 25 mg/m³) up to 60 °C / 16 bar, technical gases 16 bar up to 54 mm and 10 bar from 64 mm, treated water. For higher temperatures (local/district heating) the on-site change to FKM after consultation is provided for.
| Medium | Temponox (EPDM) |
|---|---|
| drinking water | not suitable |
| heating water (closed circuit) | suitable 105 °C / 16 bar to EN 12828 |
| cooling water | suitable 105 °C / 16 bar closed circuit |
| cooling water with antifreeze (glycol) | with restrictions (manufacturer approval) 105 °C / 16 bar release per antifreeze product by the manufacturer |
| compressed air, oil-free | suitable 60 °C / 16 bar dry, residual oil max. 25 mg/m³ with EPDM |
| technical gases (nitrogen, argon, CO2) | suitable 60 °C / 16 bar 16 bar up to 54 mm, 10 bar from 64 mm |
| natural gas (DVGW G 260) | not suitable |
| rainwater, treated water | suitable 80 °C / 10 bar |
Transitions and fire protection
Flanged and threaded transitions, transitions to Sanpress and Sanpress Inox and to multilayer systems belong to the range; the transition to galvanised steel (Prestabo, SANHA-Therm, threaded pipe) requires an insulating union. For ceiling penetrations Viega offers Temponox solutions for zero clearance under the fire protection rules – one reason why the system is widespread in commercial building.
Temponox, Sanpress Inox, Prestabo or SANHA-Therm?
Sanpress Inox is the drinking-water-capable stainless steel variant (connectors 1.4401, pipe 1.4401/1.4521) – more expensive, but without restriction. Prestabo is Viega's heating system in galvanised steel with the same profile; we do not carry it, because SANHA-Therm (galvanised carbon steel, EPDM, 12–108 mm, own profile) covers the same task and is available from us to order. The decision stainless steel versus galvanised steel is a question of the environment: damp rooms, cooling lines with condensation and industrial atmosphere speak for Temponox.
Installation in brief
- Cut with pipe cutter, deburr, no cutting disc, no carbon steel tools.
- Mark the insertion depth, push on, press; XL with press ring.
- Leak test, record; fill the installation after VDI 2035.
- Take the brown marking seriously on site: Temponox connectors never belong in a drinking water line.
Availability at Zickwolff
The standard names dimensions. What is listed here, we carry – from stock or to order; how quickly something is available we clarify on request. We stock Temponox in the sizes of the table, plus the Temponox pipe 1.4520.
Further reading
Tools of this section: system finder (which system suits medium, pipe and size) · joining methods compared (press, push-fit, grooved, welding, thread, flange, soldering) · cost comparison calculator (assembly time and downtime per method) · press systems overview.
Related metal press systems
| System | Pipe | Sizes | Availability |
|---|---|---|---|
| Viega Profipress (copper) | copper pipe EN 1057 | 12–64 mm | in stock 12–54; available to order 64 |
| Viega Sanpress (gunmetal, stainless steel pipe) | stainless steel 1.4401 and 1.4521 | 12–108 mm | in stock 12–54; available to order 64–108 |
| Viega Sanpress Inox (stainless steel complete system) | stainless steel 1.4401 and 1.4521 | 15–108 mm | in stock 15–54; available to order 64–108 |
| SANHA NiroSan (stainless steel press system) | stainless steel 1.4404, ferritic 1.4521 | 15–168.3 mm | in stock 15–54, 108; available to order 64–88.9, 139.7–168.3 |
Matching items from our range: stainless steel threaded fittings for threaded transitions, flanges and gaskets for flange transitions.
Frequently asked questions about Viega Temponox
Why must Temponox not be used for drinking water?
Because pipe 1.4520 and connector 1.4301 have no DVGW drinking water approval – the system is designed for closed circuits and marked brown. For drinking water: Sanpress, Sanpress Inox, Profipress or NiroSan.
Can I press Sanpress pipe with Temponox connectors?
Yes, Sanpress pipe 1.4401 and 1.4521 is approved with Temponox connectors. Conversely Temponox pipe is intended for Temponox connectors only; copper connectors on it need a corrosion protection tape.
Does Temponox work with glycol in the cooling circuit?
Yes, with antifreeze and corrosion inhibitors after the media list (approval per product, e.g. ethylene and propylene glycol), up to 16 bar and −25 to 105 °C.
Up to how many degrees does Temponox go?
With EPDM up to 105 °C at 16 bar (heating to DIN EN 12828). For local/district heating with higher temperatures change to FKM after consulting Viega.
Do my Sanpress jaws fit?
Yes – same SC-Contur, same Viega press jaws and press rings as Profipress, Sanpress and Sanpress Inox.
Temponox and pipe from one source
Tell us size, medium and quantity – we deliver Temponox connectors, transitions and Temponox pipe from stock.
Send an inquiryYour inquiry to Zickwolff
Send us what you have – designation, standard, quantity, date. We will clarify the rest with you.
One item or a question
Send inquiry
Not in stock? We procure it – single items too.
Designation, standard and quantity are enough.
Several items
Send bill of materials
200 items? One parts list is enough – we deliver complete.
Attach it as a file.
Helpful if already known: project and country, date needed, certificates, packaging and language of the packing lists. If anything is missing, we will ask.
It is urgent
Request express
When do you need it? Express delivery, to the site if required.
Tell us by when you need the material – we will tell you what is possible.
Technical basis: Viega brochure press connection systems (09/2024), Viega media list (11/2025), Viega planning manual industrial technology (08/2026) – distributor material, use released; DIN EN 12828, VDI 2035. Availability after Zickwolff merchandise management (09/2026). The binding approval stays with the manufacturer.