Skip to main content
Loading YT Video
Quality — Made in Germany

81 01 250
Siphon and Connector Pliers

  • Fine adjustment for ideal adjustment to diverse diameters
  • For siphons, oil filters, plastic pipes and connectors up to 80 mm diameter
  • Robust, heavy duty
  • With serrated gripping jaws; up to Ø 80 mm
  • Ideal for tightening and loosening siphon screw connections, plastic pipe fittings and round union nuts
  • For connectors and couplings with screw connection, such as Cannon circular connectors
  • For gentle loosening of hoses on nozzles and filter cartridges
  • Optimum adhesion on dirt-, oil- and fatfree surfaces
  • 25-way adjustable box joint
  • Ergonomic handle geometry
  • Chrome vanadium electric steel, forged, oil-hardened
Technical attributes
Article No.
81 01 250
black atramentized
with non-slip plastic coating
355 g
250 x 62 x 17 mm
DIN ISO 8976
REACH compliant
does not contain SVHC  
RoHS compliant
not applicable  
Working Capacity (diameter)
Ø 25 – 80 mm
Adjustment positions

Large clamping range – several possible applications

For odour trap screw joints, connectors and hoses that have become stuck

The siphon and connector pliers from Knipex are suitable for a range of applications requiring large grip widths and gentle change of grip that will not damage components. When odour traps need to be opened on kitchen and bathroom fittings, they can be gripped and twisted powerfully in a measured way using the siphon and connector pliers from Knipex.

Screw connections on plastic pipes and sensitive connector plugs can be loosened and tightened. The pliers are also suitable for detaching hoses that have become stuck to supports – e.g. coolant hoses.

Surface contour adapted to the pipe protects screw joints

The gripping jaws here have a different shape to those of water pump pliers, for example. With the siphon and connector pliers, the shape of the gripping jaws has been designed for large pipe diameters. As a result of their round shape, the siphon and connector pliers are used with union nuts on connectors in addition to screw joints of pipes conveying liquids and gas. Such connectors establish an electrical connection that is weather and vibration resistant, e.g. between coaches of rail vehicles. Work on the sensitive surfaces of the screw joint is conducted gently yet powerfully using these pliers.

Versatile and tough: 25 possible settings and box joint design

With the 25 possible settings, which can be conveniently set to the desired grip width using the fine adjustment push button, the Knipex siphon and connector pliers have a large gripping range of Ø 25 - 80 mm. Thanks to the box joint design and manufacture from oil-hardened chrome vanadium electric steel, the pliers are very tough.

Brief overview

Reliable tightening and loosening of odour traps, plastic pipes and connectors

Grip components with diameter of 25 - 80 mm

25 possible settings

Fine adjustment at the press of a button

Handles coated with non-slip plastic

Pliers are black, phosphate-treated; with teeth for gripping

Length 250 mm

Net weight 355 g

Siphon and connector pliers from Knipex: useful, good quality in the range

Whether special tool or pliers for standard applications: Knipex offers useful, good quality tools in the range.

In everyday work, this means: the design delivers the function, while the selection of materials and processing guarantee the tool life. The great benefits of the tools and their safe, comfortable use are the results of decades of experience making pliers, continuous development and Knipex’s commitment to high quality standards.

Pliers from Knipex are manufactured for many years of professional use.

For odour trap screw joints

The width and shape of the jaw have been designed for tightening and loosening odour trap screw joints.

Grip profile for large diameters

"The grip profile is shaped to permit optimal gripping of large diameters, e.g. of nuts."

Gripping and twisting of connectors

Wide jaw opening suitable for connectors, for example (Cannon circular connectors).

Detaching oil filters that have become stuck

In garages, the siphon and connector pliers help detach oil filters that have become stuck.

All variations

81 03 250
Siphon and Connector Pliers
181-250 mm
Ø 25 – 80 mm
Length: 250 mm
81 11 250
Siphon and Connector Pliers
181-250 mm
atramentised / lacquered / burnished
Ø 10 – 75 mm
Length: 250 mm
81 13 250
Siphon and Connector Pliers
181-250 mm
Ø 10 – 75 mm
Length: 250 mm
Technical changes and errors reserved.