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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
01

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.

02

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
03

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, fitting, and service valve.  

HAWLE_Service valves ZAK
2810
Service valves ZAK/ISO
HAWLE_Service valves ZAK
2811
Service valves with ZAK spigot end and ZAK socket
2812
Service valve with double ZAK socket
HAWLE_Service valves for vertical installations ZAK
3160
Service valves for vertical installations ZAK/ISO
HAWLE_Service valves for vertical installations ZAK
3161
Service valves for vertical installations ZAK/ZAK
HAWLE_Service valves for vertical installations ZAK
3162
Service valves for vertical installations ZAK/ISO, swiveling
3163
Service valves for vertical installations ZAK/ZAK, swiveling
HAWLE_Water meter console
2932
Water meter console ZAK with ductile iron wall plate
HAWLE_HAKU-HAWLINGER ZAK
2310
HAKU Hawlinger ZAK, vertical/horizontal
HAWLE_HAKU-HAWLINGER vertical outlet ZAK
2305
HAKU Hawlinger drilling saddle ZAK
HAWLE_Shut-off adapter ZAK
3721
Shut-off adapter ZAK
HAWLE_HA-WELD welding clamp
5261
HA-WELD welding clamp
HAWLE_Universal-HAWLINGER ZAK
2410
Universal-H-Hawlinger ZAK
HAWLE_Universal pipe saddle ZAK
3540
Universal-H-pipe saddle ZAK
HAWLE_Shut-off saddle with O-ring ZAK
3810
Universal shut-off H saddle ZAK
HAWLE_Universal-HAWLINGER ZAK
2410G
Universal-H-Hawlinger ZAK without strap and saddle seal
HAWLE_Universal pipe saddle ZAK
3540G
Universal-H-pipe saddle ZAK without straps and saddle gasket
HAWLE_Shut-off saddle with O-ring ZAK
3810G
Universal shut-off saddle
HAWLE_ZAK press-fit
6164
ZAK press-fit
HAWLE_ZAK reduction fitting
6189
Adapter ZAK/thread
HAWLE_ZAK reduction fitting
6340
Adapter with ZAK socket on both sides
HAWLE_ZAK reduction fitting
6350
Reduction adapter ZAK spigot on ZAK socket
HAWLE_ZAK connector
6468
ZAK-connector, swiveling
HAWLE_Swivel elbow ZAK fitting 90°
6469
Swivel elbow ZAK fitting 90°
6541
ZAK-Tee piece with ZAK-sockets and ZAK-spigot
HAWLE_ZAK plug
6980
ZAK plug
HAWLE_ZAK wall inlet fitting
6992
Wall inlet fitting ZAK/thread
HAWLE_ZAK wall inlet fitting
6993
Wall inlet fitting ZAK/ZAK
HAWLE_ZAK wall inlet fitting
6994
Wall inlet fitting ZAK/thread with ring seal
HAWLE_ZAK Adapter
5895
ZAK Adapter
HAWLE_O-RING for ZAK
6945
O-RING for ZAK
HAWLE_Securityring for ZAK
6970
Securityring for ZAK
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 pipe saddle ZAK
HAWLE_HAKU pipe saddle, ZAK, 45°
5262
HAKU pipe saddle with 45° ZAK outlet
HAWLE_HAKU Shut-off saddle ZAK
5320
HAKU Shut-off saddle ZAK
HAWLE_ZAK push fitting
6160
ZAK push fitting
HAWLE_ZAK push fitting
6170
ZAK push fitting movable
HAWLE_ZAK fitting with PE tail
6180
ZAK fitting with PE tail
HAWLE_Swivel elbow ZAK fitting 90°
6465
Swivel elbow ZAK/ISO fitting 90°
HAWLE_Elbow fitting 90° ZAK with PE end
6479
ZAK-elbow PE 90°
HAWLE_Elbow ZAK fitting 90°
6480
ZAK-ISO elbow 90°
HAWLE_ZAK T piece
6540
ZAK T piece
to product catalogue
04

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.
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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