Press systems · Viega Sanpress
Viega Sanpress: gunmetal press connectors for stainless steel pipe – 12 to 108 mm
Sanpress combines press connectors in gunmetal or silicon bronze with stainless steel pipe 1.4401 or 1.4521 – the economical stainless steel system for the drinking water installation that can be joined to copper and plastic in a mixed installation. This page explains pipe and sizes, what we deliver from stock, the gas variant Sanpress G, the media assignment and how it differs from the all-stainless system Sanpress Inox and from Sanha NiroSan.
- Pipe
- Stainless steel pipe 1.4401 / 1.4521 (DVGW GW 541, DIN EN 10312)
- Sizes
- 12–108 mm (76.1–108 mm XL with press ring)
- Connector
- Gunmetal or silicon bronze
- Sealing element
- EPDM (standard) · HNBR (Sanpress G)
- Pressure / temperature
- Drinking water 10 bar / 80 °C · heating 16 bar / 105 °C
- Availability
- from stock (Sanpress and Sanpress G)
What Sanpress is meant for
Sanpress is the system for drinking water installations where stainless steel pipe is required but the connector need not be stainless steel: gunmetal and silicon bronze are low in lead, hydraulically favourable and combine well with other materials. Viega names drinking water as the application; the media list additionally approves heating and cooling water, oil-free compressed air, technical gases, fire-fighting water and treated water – each within the limits of the table below. Fuel gases go only with the G variant; steam and oil belong to Sanpress Inox with FKM.
The advantage over the all-stainless system Sanpress Inox lies in the price of the connectors and the flexibility of the mixed installation; the advantage of Sanpress Inox is the all-stainless execution where gunmetal is unwanted (special media, high hygiene requirements).
How the joint works
As with all Viega metal systems: cut the pipe to length, deburr, mark the insertion depth, insert, press. The gunmetal or silicon bronze connector grips the stainless steel pipe in the bead, the EPDM sealing element seals. For 76.1 to 108 mm press ring and hinged adapter jaw are used.
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 Sanpress pipe comes in two materials: 1.4401 (austenitic, standard) and 1.4521 (ferritic, molybdenum-alloyed, nickel-free). Both are approved for drinking water to DVGW GW 541 and apply to Sanpress and Sanpress Inox – the pipe is the same, only the connector distinguishes the systems. The table shows the sizes and what we deliver from stock:
| Size | Outside ø (mm) | DN | Availability |
|---|---|---|---|
| 12 | 12 | 10 | in stock |
| 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, threaded and flanged transitions in gunmetal – shop category fittings/gunmetal.
Sanpress and Sanpress G
- Sanpress (EPDM, green dot): drinking water, heating/cooling, special media after the media list. 12–108 mm.
- Sanpress G (HNBR, yellow marking): natural gas and LPG to DVGW G 260 with MOP 5, technical gases; DVGW G 5614, TRGI. Not for drinking water. 12–108 mm, pipe 1.4401. From stock.
For higher temperatures (district heating, low-pressure steam) and oils Viega provides for the change to Sanpress Inox with FKM sealing element; with Sanpress itself the on-site replacement of EPDM by FKM outside the drinking water installation is possible after consultation.
Which medium with which sealing element
Assignment after the Viega media list (11/2025) and the planning manual (08/2026); limits per medium as for Profipress. The system finder calculates with them.
| Medium | Sanpress (EPDM) | Sanpress G (HNBR) |
|---|---|---|
| drinking water | suitable 80 °C / 10 bar to DIN 1988-200 / EN 806-2 | not suitable |
| heating water (closed circuit) | suitable 105 °C / 16 bar to EN 12828 | – |
| cooling water | suitable 105 °C / 16 bar closed circuit | – |
| 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 | suitable 60 °C / 16 bar 16 bar up to 54 mm, 10 bar from 64 mm |
| natural gas (DVGW G 260) | not suitable variant Sanpress G | suitable 70 °C / 5 bar MOP 5 (0.5 MPa) to DVGW G 260 |
| fire-fighting water (wet system) | suitable 105 °C / 16 bar wet system, VdS approval per system | – |
| rainwater, treated water | suitable 80 °C / 10 bar | – |
| liquefied petroleum gas (propane) | – | suitable 70 °C / 5 bar MOP 5 (0.5 MPa) to DVGW G 260 |
Mixed installation: copper, plastic, thread, flange
Sanpress is expressly meant for mixed installation: the gunmetal connectors are the same as for Profipress; transitions to copper pipe, to Raxofix and other multilayer systems, to thread to EN 10226-1 and to flanges belong to the range. The flow rule in drinking water must be observed (the less noble material upstream of the more noble one) – stainless steel downstream of copper is uncritical, copper downstream of galvanised steel is not. Details under mixed installation and corrosion.
Sanpress, Sanpress Inox or NiroSan?
Sanpress Inox is the all-stainless system (connectors 1.4401) on the same pipe – the choice for special media, industry and wherever gunmetal is not wanted. Sanha NiroSan is Sanha's stainless steel press system (connectors 1.4404, pipes 1.4404/1.4521 up to 168.3 mm) with its own profile; we stock both stainless steel systems, they are not mixed. For the heating circuit without drinking water approval Temponox is the more economical stainless steel alternative.
Installation in brief
- Cut stainless steel pipe with a pipe cutter, deburr – no cutting disc, no contamination by carbon steel tools.
- Mark the insertion depth, push the connector on up to the stop, press with Viega press jaw (12–54 mm) or press ring (76.1–108 mm).
- Leak test wet or dry, record; plan fixed and sliding points for the thermal expansion of stainless steel.
- Pipe clamps with sound insulation insert; no contact corrosion from galvanised clamps without insert.
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 Sanpress and Sanpress G, plus the Sanpress pipe 1.4401 in straight lengths.
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 Inox (stainless steel complete system) | stainless steel 1.4401 and 1.4521 | 15–108 mm | in stock 15–54; available to order 64–108 |
| Viega Temponox (stainless steel, heating/cooling) | stainless steel 1.4520 | 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 and malleable iron fittings for threaded transitions, flanges and gaskets for flange transitions.
Frequently asked questions about Viega Sanpress
What is the difference between Sanpress and Sanpress Inox?
The pipe is the same (stainless steel 1.4401 or 1.4521). With Sanpress the connectors are gunmetal or silicon bronze, with Sanpress Inox stainless steel 1.4401. Sanpress is more economical and meant for mixed installation, Sanpress Inox is the all-stainless system for special media and industry.
Can I press Sanpress connectors onto copper pipe?
The gunmetal connectors are identical with Profipress and approved for copper pipe to EN 1057. Transitions between copper and stainless steel pipe are made with them; the flow rule applies.
Which pipe is better for drinking water, 1.4401 or 1.4521?
Both are approved to DVGW GW 541. 1.4521 is ferritic and nickel-free, with high resistance to chloride-induced stress corrosion cracking; 1.4401 is the austenitic standard. For special media and gas Viega approves per material – observe the media list.
Up to how many bar does Sanpress go?
Drinking water 10 bar (DIN 1988-200), heating and closed cooling circuits 16 bar at 105 °C, technical gases 16 bar up to 54 mm and 10 bar from 64 mm (manufacturer statements).
Is Sanpress approved for natural gas?
Only as Sanpress G with HNBR sealing element (DVGW G 5614, gas to G 260, MOP 5). The standard system with EPDM is not.
Sanpress and stainless steel pipe from one source
Tell us size, medium and quantity – we deliver Sanpress connectors, transitions and Sanpress 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.
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Designation, standard and quantity are enough.
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Attach it as a file.
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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), Viega Application Technology Industrial Systems (7th edition) – distributor material, use released; DVGW GW 541, W 534, G 5614. Availability after Zickwolff merchandise management (09/2026). The binding approval stays with the manufacturer.