PURAFIT® (series 3000) | Lead-free silicon bronze
PURAFIT® threaded fittings - the lead-free original!
We produce threaded fittings of the series PURAFIT® - just like our press fittings PURAPRESS® - from the completely lead-free premium material silicon bronze CuSi (CW 724R). This copper alloy is optimally adapted for the use in drinking water systems as it fulfills the strict legal requirements of the Drinking Water Directive and any national norms and regulations. By using lead-free PURAFIT® threaded fittings, installers can always be certain that they will not be subject to any legal claims in case the lead tolerances are exceeded.
Also, lead-free threaded fittings satisfy the market's desire for safe and healthy drinking water installations. PURAFIT® threaded fittings from CuSi are tested and certified by all relevant national and international certification bodies and can be used for a wide variety of applications in the sanitary and heating industry.
SANHA® has been a pioneer in the production of lead-free fittings, starting production in 2009 and offering these premium, future-proof products ever since. With over 60 million sold since then, we have paved the way for lead-free drinking water installations and are being trusted among installers, merchants and planners worldwide.
Products
Filter products
Operating conditions for PURAFIT® threaded fittings made from lead-free silicon bronze |
|
|---|---|
| Dimensions | Operating pressure depending on the temperature |
| Water and aqueous solutions | |
| 1/8"…3/4" | 25 bar - 120 °C 16 bar - 225 °C |
| 1"…3" | 16 bar - 120 °C 6 bar - 225 °C |
| Flammable gases | |
| 1/8"…3" | 5 bar |
| Technical gases (non-toxic, non-flammable) | |
| 1/8"…3" | 16 bar / depending on application |
Features of PURAFIT® threaded fittings
- Fast and secure installation due to a sealing thread feature in the thread
- Thread according to EN 10226 and ISO7/1 Type R and Rp. Please note that a proprietary teflon tape may be used in practice to accommodate manufacturing tolerances between the fittings
- Spanner flats for user-friendly and easy installation
- Lead-free alloy silicon bronze CuSi: PURAFIT® fittings offer a unique hygienic solution for drinking water installations due to the exclusive use of lead-free premium silicon bronze
- Optimum corrosion resistance as dezincification-resistant and free of tension crack corrosion
- No risk of fire thanks to the type of connection (no open flame)
- No porosity of casting due to the high material density
- All dimensions from 1/8" to 3" including valve and pipe extensions
Areas of application
More applications on demand.
PURAFIT® FAQ
1. What is PURAFIT®?
PURAFIT® is a range of lead-free threaded fittings from SANHA® made from silicon bronze CuSi (CW724R). The range was developed specifically for drinking water installations and can also be used for other applications such as heating and cooling circuits. SANHA® has been manufacturing CuSi fittings since 2009.
2. Are there lead-free threaded fittings for drinking water?
Yes. PURAFIT® threaded fittings are made from lead-free silicon bronze CuSi (CW724R). The material is suitable for drinking water installations and is highly resistant to dezincification. PURAFIT® therefore offers a lead-free alternative to threaded fittings made from lead-containing copper alloys.
3. Is PURAFIT® suitable for drinking water?
Yes. PURAFIT® was developed for use in, amongst other things, drinking water installations. The threaded fittings are made of lead-free silicon bronze CuSi (CW724R). SANHA® describes the material as highly resistant to dezincification and suitable for drinking water.
4. For which applications is PURAFIT® suitable?
In addition to drinking water, SANHA® lists heating and cooling circuits, solar systems and compressed air, amongst others, as areas of application for PURAFIT®. For each specific application, the relevant technical operating conditions and approvals must be observed.
5. What is the difference between PURAFIT® and PURAPRESS®?
Both product ranges are made from lead-free silicon bronze CuSi (CW724R). The main difference lies in the connection technology: PURAFIT® comprises threaded fittings, whilst PURAPRESS® comprises press and transition fittings. Both product lines are therefore part of SANHA®’s lead-free CuSi portfolio.
6. Why is silicon bronze suitable for threaded fittings?
The silicon bronze CuSi (CW724R) used by SANHA® is lead-free and highly resistant to dezincification. As a result, the material combines the properties of a copper alloy with the advantage that, due to the nature of the material, no lead is released from the fitting into drinking water.
7. Since when has PURAFIT® been available in lead-free silicon bronze?
SANHA® has been using silicon bronze CuSi as the material for lead-free fittings since 2009. PURAFIT® is therefore positioned by SANHA® as the ‘original made from CuSi’.
8. Is there an EPD for PURAFIT®?
Yes. PURAFIT® and PURAPRESS® have a joint verified Environmental Product Declaration (EPD) in accordance with ISO 14025 and EN 15804. The EPD, with registration number EPD-Kiwa-EE-184883-EN, was issued on 17 October 2024 and is valid until 17 October 2029.
Certificates
Show cases
| Country | Reference | Product |
|---|---|---|
| Disney Adventure Cruise | PURAPRESS® | Silicon bronze, PURAFIT® | Silicon bronze, SANHA®-Press | Copper | |
| Hampton by Hilton, Freiburg | PURAFIT® | Silicon bronze, Heating circuit manifolds, NiroTherm® | Stainless steel, SANHA®-Therm | Carbon steel |