Drainage testing with air? Dropping

[macka09]

Hi folks.

What is the best way to trace a drop on a 4” stack test? I’m only using the little 100mm u gauge and bungs but can’t find nothing with ldf? Cheers

 

[Deleted member 120897]

I believe certain people use smoke bombs Like these

 

[king of pipes]

Bung it off at the manhole and any low points , fill it up with water you'll find it . Kop