marijuananation
Well-Known Member
Kitty !!
What you have there appears to be a vent line to the roof which was roughed in when the foundation was poured.
You will only have to make the interior vent pipe connections to the basin.
Blue lines in the next photos highlight the air vent line. The vent line extends about 3 inches below the lid of the sewage basin and is sealed by rubber grommet.
http://www.handymanhowto.com/wp-content/uploads/2009/01/dsc01205.jpg
Another View of the Sewage Basin Split Cover
I hope this helps..
Peace and Happy Growing !!
What you have there appears to be a vent line to the roof which was roughed in when the foundation was poured.
You will only have to make the interior vent pipe connections to the basin.
Blue lines in the next photos highlight the air vent line. The vent line extends about 3 inches below the lid of the sewage basin and is sealed by rubber grommet.
http://www.handymanhowto.com/wp-content/uploads/2009/01/dsc01205.jpg
Another View of the Sewage Basin Split Cover
I hope this helps..
Peace and Happy Growing !!