Our Hawle ISO fittings and service valves made of robust ductile cast iron are as diverse as the many and varied installation scenarios. For decades, our motto has been “nothing is impossible” and this has always proven to be true. We have the appropriate and secure special fitting variant for every house connection. This saves time and money in the long term because they can be reused. Hawle's durable and proven fitting solutions are bound to impress as they are also easy and quick to install.
The ZAK system from Hawle enables tapping saddles, valves and fittings to be connected quickly and easily. The so-called "bayonet connection" is simple and can be installed in seconds and disassembled and reused just as quickly if necessary. Producing reliable threadless connections for water and sewage pipeline valves and fittings has never been easier. They are flexible, 100% leak-proof and corrosion-resistant even at 16 bar pressure, making them exceptionally durable.
Features
ISO-socket:
- The function of the ISO pipe fitting is clear and simple: the O-ring made of highly elastic elastomer seals even when depressurized due to its pretension on the pipe.
- As the water pressure and pipe tension increase, the sealing and grip rings are compressed further into the conical chamber, thus increasing the sealing and gripping effect
- The gripping and sealing functions only act on the outer diameter of the pipe; therefore only one fitting is required for all pressure ratings up to PN 16
- The joint is flexible; the fitting can be turned on the pipe and disassembled on demand without affecting the grip or seal. The installation of the fitting is quick and simple.
All ISO pipe fittings can also be supplied for PVC pipes with a spezialised grip ring at extra cost.
ZAK:
- The threadless, restraint jointing system for the service connections made of
- ductile iron, epoxy powder coated
- Integrated on pipe saddles, service valves and Fittings
- Operating pressure PN 16
- Simple installation: Push into socket - rotate for 90° - pull out - fit the snap ring
Learn more about the Hawle ZAK system!
Standards
ISO-socket:
- For PE-pipes according to EN 12201 and DIN 8074 | to PN 16; up to 30° C medium temperature, also for vacuum (with support liner)
- restraint acc. to DIN 8076 T1/T3
- with special clamp for PVC pipes acc. to EN 1452-2
ZAK:
ZAK socket d 34 max. drilling Ø 25:
- ISO push-fit for PE pipes Ø 20 - Ø 50 according to EN 12201 and DIN 8074 up to PN 16.
- Suitable up to 30° C medium temperature
ZAK socket d 46 max. drilling Ø 35:
- ISO push-fit for PE pipes Ø 32 - Ø 63 according to EN 12201 and DIN 8074 up to PN 16.
- Suitable up to 30° C medium temperature
ZAK socket d 69 max. drilling Ø 40/50:
- ISO push-fit for PE pipes Ø 50 - Ø 63 according to EN 12201 and DIN 8074 up to PN 16.
- Suitable up to 30° C medium temperature
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Additional information
Explainer videos

Product variants (10)
Bookmark | BIM data | Item number | Description | Nominal diameter | Outlet 1 | Outlet 2 | Pressure rating | Weight |
---|---|---|---|---|---|---|---|---|
Show | 5005862 | ZAK-ISO-FITTING ADAPTOR PN16 | D 20-ZAK34 | PN16 | 0.33 KG | |||
Show | 5005864 | ZAK-ISO-FITTING ADAPTOR PN16 | D 25-ZAK34 | PN16 | 0.39 KG | |||
Show | 5005866 | ZAK-ISO-FITTING ADAPTOR PN16 | D 25-ZAK46 | PN16 | 0.5 KG | |||
Show | 5005868 | ZAK-ISO-FITTING ADAPTOR PN16 | D 32-ZAK34 | PN16 | 0.51 KG | |||
Show | 5005870 | ZAK-ISO-FITTING ADAPTOR PN16 | D 32-ZAK46 | PN16 | 0.58 KG | |||
Show | 5005872 | ZAK-ISO-FITTING ADAPTOR PN16 | D 40-ZAK46 | PN16 | 0.75 KG | |||
Show | 5005874 | ZAK-ISO-FITTING ADAPTOR PN16 | D 40-ZAK34 | PN16 | 0.723 KG | |||
Show | 5005876 | ZAK-ISO-FITTING ADAPTOR PN16 | D 50-ZAK46 | PN16 | 1.08 KG | |||
Show | 5005880 | ZAK-ISO-FITTING ADAPTOR PN16 | D63-ZAK69 | PN16 | 1.82 KG | |||
Show | 5005882 | ZAK-ISO-FITTING ADAPTOR PN16 | D 63-ZAK46 | PN16 | 1.41 KG |