MITIGATION JOB PHOTOS
Testing vacuum communication
below the slab with chemical smoke.
We puff the smoke over a 1/2" hole
in the slab and observe. The
suction from the system is strong
enough to pull the smoke down
into the hole.
The sump pit de-pressurization system.
Sealed sump crock cover.
Roof boot front view.
Roof boot side view.
Attic pipe leading to fan.
Attic pipe coming from garage.
Vacuum manometer gauge.
External system, view from street.
External system,
view from side.
External system,
view from back
yard.
Suction pipe in basement.
Fan located in basement garage.
Custom job: 10" thick slab. Two
holes cut in slab for better access
to sub slab material.
Nicely trimmed carpet around the pipe.
Finished spaces are not ideal for a suction
pipe, but sometimes there's no choice.