February 11
th
, 2019
2
INTRODUCTION:
The ALH System-One tapping machine cuts and taps ¾” – 2 ½” NPT holes gas-free in cast iron
and steel live mains operating at up to 60psig and 3” – 48” diameter. The system is mostly
aluminum with a very low-profile sliding gate valve making it extremely compact and lightweight.
Modular components allow multiple operations from the ALH valve platform to be completed quickly
and safely in a completely gas-free environment.
Some of its gas-free operations are:
Metallic and brass based polyethylene tee insertion.
Plug
insertion/extraction.
Live camera inspection.
Mains internal visual examination through the inspection canopy.
By-pass and bagging off platform.
Vent and purge.
Gas-Free gutless tee extraction/replacement/abandonment.
IMPORTANT
– Tapping a 3” Main
You MUST remove the holesaw, or shell cutter, from the tap before tapping a 3” main to eliminate
the risk of cutting into the bottom of the pipe.
1. Cut the hole as usual but do not engage the tap at this stage.
2. Lift the drill head into the canopy and close the slide valve.
3. Remove the drill head from the valve.
4. Remove the cutter from the tap.
5. Replace the drill head and open the slide valve.
6. Tap the hole.
