Twin Stop

The Twin Stop Airbags are constructed from Ripstop fabric and are fully tested and field-trialled. The slimline design allows for two 3” and 4” bags to be inserted through a 1¼” (38mm) hole, with 5” to 12” bags inserted through a 2” (56mm) hole.

The Twin Stop Bag works alongside the ALH System 1 drilling and tapping machine, which has been used worldwide for over 30 years.  The Twinstop bags are fully approved for use and are manufactured in accordance with GIS/E4

• Gas free working
• Low-pressure working (75mbar)
• Metallic and PE pipes
• Smaller excavations
• 3” to 12” metallic pipes, up to 315mm PE
• Independent bag replacement
• Simple and easy to use
• Can be used with keyhole technology
• Part of the System 1 family
• Tested, field trialled and approved to GIS/E4

What is Flowstopping?

Flowstopping is a safe, easy-to-use, and cost-effective system for maintaining, repairing, and modifying low-pressure distribution networks while preserving continuity of supply. The entire procedure is totally gas-free, carried out through an arrangement of valves, and uses airbags to create a seal to prevent gas flow beyond the airbag.