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Hawle ZAK – Threadless Pipe Connections

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  1. Home
  2. Hawle Knowledge
  3. Systems & Solutions
  4. Hawle ZAK
  1. 01 Origins
  2. 02 Connects valves and fittings in seconds
  3. 03 Flexible and adjustable to your needs
  4. 04 Reliable for hot tap pipe drilling

Origins

Reliable since its development in 1995, the patented Hawle ZAK-system makes connecting valves and fittings quick and easy. The simple bayonet-style connection can be installed in seconds and can be removed for reuse just as quickly if needed. Making dependable threadless connections for water and wastewater service pipeline valves and fittings has never been easier. 

“ZAK” is a reference to the German statement „Zugfest – Arretierbar – Korrosionssicher“, which translates to “restraint – lockable – corrosion resistant”. It also sounds similar to the German expression “zack-zack”, which means “quickly” or “hurry up” and corresponds to the fast, easy assembly of ZAK-system fittings and valves.

Connects valves and fittings in seconds

The bayonet-style connection of the ZAK-system is simple and fast, meaning service line connections can be made or removed in seconds. Simply: 

  1. Grease the two O-rings,
  2. Push the two connections together,
  3. Rotate one fitting 90° clockwise,
  4. Pull fittings apart to lock them, and
  5. ​​Insert the supplied snap ring to keep them locked together.  

The ZAK-system saves time and does not require separate sealing products to make 100% leak-proof connections. 

 

  • Flexible and adjustable to your needs 

Depending on the model, ZAK fittings can be rotated 360° during installation, allowing assembly in any orientation. The ZAK-system is also flexible 3° in any direction after installation, compensating for perpendicular ground movements in both the horizontal and vertical directions. This makes it highly resistant to the types of failures caused by earthquakes, ground settling, or ground heaving which would cause threaded connections to break.  

 

  • 100% Leak-proof double O-ring design 

The ZAK-system is 100% leak-proof in any orientation, maintaining a complete seal even after ground shifting. Separate sealing products like hemp are not required for the ZAK-system, making installation even faster over traditional threaded connections.

 

  • Safe and durable connections 

Water pressure keeps the ZAK-system completely locked while in service, but a safety snap ring adds a second layer of protection and keeps fittings in place when the line is not pressurized. The Hawle ZAK-system can withstand pressures up to 16 Bar (PN 16). 

 

  • Corrosion proof and incrustation resistant 

Threaded connections have bare metal that is susceptible to corrosion and incrustation, degrading the threads and binding them together, potentially leading to leaks. With the ZAK-system, valves and fittings are completely epoxy powder coated to GSK standard requirements, leaving no exposed surfaces for corrosion to occur or rough surfaces for deposits to accumulate.

Hawle ZAK System Installation

Professional and adaptable

ZAK-system connections provide a finished, professional look and come with components for every aspect of your service line connection. Made from high quality castings in Europe, ZAK-system fittings are made of GJS-400-15 ductile iron and are coated both inside and out with a durable epoxy powder coating. All of the following products are available with ZAK-system connections:

  • Pipe saddles 
  • Service valves 
  • Fittings (elbows, tees, etc.) 
  • Adapters (ISO push fitting and others) 

Valves and fittings are available as ZAK 34 (d25/d32) and ZAK 46 (d40/d50) for pipe sizes DN 15 through DN 50 (NPS ½ through NPS 2), and pipe saddles can accommodate water mains up to DN 500 (NPS 20). Make quick service line connections to water mains with a ZAK-system tapping saddle, a ZAK-fitting, and a ZAK-service valve.  

HAWLE_Service valves ZAK
2810
ZAK service valve with ISO outlet
HAWLE_Service valves ZAK
2811
ZAK service valve with spigot/socket
2812
ZAK service valve with sockets
HAWLE_Service valves for vertical installations ZAK
3160
ZAK angle service valve with ISO outlet
HAWLE_Service valves for vertical installations ZAK
3161
ZAK angle service valve with socket outlet
HAWLE_Service valves for vertical installations ZAK
3162
ZAK angle service valve with ISO outlet, swiveling
3163
ZAK angle service valve with socket, swiveling
HAWLE_Water meter console
2932
ZAK water meter console
HAWLE_HAKU-HAWLINGER ZAK
2310
HAKU-Hawlinger tapping saddle ZAK
HAWLE_HAKU-HAWLINGER vertical outlet ZAK
2305
HAKU-Hawlinger tapping saddle ZAK
HAWLE_Shut-off adapter ZAK
3721
Shut-off adapter for tapping saddles ZAK
HAWLE_HA-WELD welding clamp
5261
HA-WELD tapping saddle
HAWLE_Universal-HAWLINGER ZAK
2410
Universal-H-Hawlinger tapping saddle ZAK
HAWLE_Universal pipe saddle ZAK
3540
Universal-H tapping saddle ZAK
HAWLE_Shut-off saddle with O-ring ZAK
3810
Universal shut-off tapping saddle ZAK
HAWLE_Universal-HAWLINGER ZAK
2410G
Universal-H-Hawlinger tapping saddle ZAK
HAWLE_Universal pipe saddle ZAK
3540G
Universal-H tapping saddle ZAK
HAWLE_Shut-off saddle with O-ring ZAK
3810G
Universal shut-off tapping saddle ZAK
HAWLE_ZAK press-fit
6164
ZAK brass press-fit adapter
HAWLE_ZAK reduction fitting
6189
ZAK adapter with external thread
HAWLE_Übergangsfitting ZAK
6189SP
ZAK adapter fitting
HAWLE_ZAK reduction fitting
6340
ZAK adapter with sockets
HAWLE_ZAK reduction fitting
6350
ZAK reducing adapter
HAWLE_ZAK connector
6468
ZAK swivel type connector with ISO socket
HAWLE_Swivel elbow ZAK fitting 90°
6469
ZAK swivel type elbow fitting socket / spigot
6541
ZAK T-fitting with sockets and spigot
HAWLE_ZAK plug
6980
ZAK plug with spigot end
HAWLE_ZAK wall inlet fitting
6992
ZAK wall inlet fitting with thread
HAWLE_ZAK wall inlet fitting
6993
ZAK wall inlet fitting with socket and spigot
HAWLE_ZAK wall inlet fitting
6994
ZAK wall inlet fitting with internal thread
HAWLE_ZAK Adapter
5895
ZAK drilling adapter
HAWLE_O-RING for ZAK
6945
O-ring for ZAK connections
HAWLE_Securityring for ZAK
6970
Retaining ring for ZAK connections
to product catalogue

Reliable for hot tap pipe drilling

Capable of drilling under pressures up to 16 bar on in-service water mains, the Hawle ZAK-system is perfect for your hot tapping operations. The ZAK-drilling adapter pairs effortlessly with the Hawle pipe drilling machine and a drilling saddle, enabling you to drill cast iron, steel, PVC, PE and AC pipelines simply and effectively, with or without internal pressure.

 

A service line with Hawle-ZAK valves and fittings

Discover ZAK products for wastewater

Hawle offers a range of ZAK valves and fittings for this special application to ensure a fast and reliable wastewater house connection.

 

HAWLE_Waste water service valves
2616
ZAK service valve with knife gate
HAWLE_HAKU pipe saddle ZAK
5260
HAKU tapping saddle ZAK
HAWLE_HAKU pipe saddle, ZAK, 45°
5262
HAKU tapping saddle ZAK
HAWLE_HAKU Shut-off saddle ZAK
5320
HAKU shut-off tapping saddle ZAK
HAWLE_ZAK push fitting
6160
ZAK adapter with ISO socket
HAWLE_ZAK push fitting
6170
ZAK adapter with detachable ISO socket
HAWLE_ZAK fitting with PE tail
6180
ZAK fitting with PE end
HAWLE_Swivel elbow ZAK fitting 90°
6465
ZAK-ISO swivel type elbow fitting
HAWLE_Elbow fitting 90° ZAK with PE end
6479
ZAK elbow fitting with PE end
HAWLE_Elbow ZAK fitting 90°
6480
ZAK-ISO elbow fitting
HAWLE_ZAK T piece
6540
ZAK T-fitting with sockets
to product catalogue

Benefits of using the Hawle ZAK-system

  • Fast – save time on jobs that have high hourly rates or tight deadlines
  • Flexible – compensates ground movement and vibrations
  • Corrosion-proof – long-lasting and can be removed and reused easily
  • Leak-proof – completely sealing up to 16 bar
  • Reliable – durable construction with high quality materials and rigorous quality checks
  • Versatile – a wide product range for various house connections.

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Any questions? Get in touch!

Do you have any further questions about the application of ZAK fittings in service lines or are you not sure which solution fits better in your case? Please use our contact form to get in touch. We are happy to advise you:

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