Wask Equipment


This latest generation equipment enables a temporary flow of gas to be provided around a section of polyethylene or ferrous main which is undergoing maintenance or repair. The WASK Equipment comprises a Canopy enclosing the Bagtube which is mounted on the Teeset base, enabling a Stopper Bag to be inserted through a tapping into the main and inflated to stop the flow of gas.

Sets of interchangeable Noses and Shoes permit the Stopper Bag to be correctly positioned relative to the centre line of the main. Positive support of the inflated Stopper Bag against the gas pressure is provided by the Nose and Shoe assembly. In the event of the Stopper Bag failure, replacement is simple, quick and safe.

Incorporated within the Bypass Head is a 1″ vent and purge valve and a 3/8″ valved pressure test probe which can be inserted through the main tapping into the full gas flow.


  • Pipe Range PE 125-400mm Ø / Steel 80/100-400mm Ø
  • Gas free working
  • Maximum allowable main pressure 1.5psi
  • Metallic and PE pipes
  • Interchangeable Noses and Shoes for correct positioning
  • 56mm Cut Hole Ø
  • Supplied as kit
  • Incorporated 1″ vent and purge valve
  • Easy replacement of Stopper Bag in case of failure

Component Map

Pipe Size Range PE125-400mm Ø
Pipe Size Range Steel80/100-400mm Ø
Maximum Allowable Main Pressure1.5psi
Max Bag Inflation Pressure3psi
Cur Hole Diametre56mm Ø
CodeDescriptionPriceQtyReview Cart
WASKPE 125-400mm Ø / Steel 80/100-400mm Ø WASK Gas Equipment$0.00
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