The genuine NU-Calgon 4179-16 is a 12-pack of 16g Mag 16 CO2 Cartridges that are used with the 4179-01 Gallo Gun that function together to clear clogged or slow moving drain lines.
Mag 16 CO2 Cartridges have superior clearing power with revolutionary new design.
The NU-Calgon 4179-16 clears a single standard condensate drain line with 800 psi of oil free air.