I neglected to indicate Holding Tank Vent Lines:

The Sewage Holding Tank requires Venting, to allow for proper ventilation (eliminates odours) and to avoid creating a vacuum when pumping out. I recommend TWO Vent lines, promoting cross-ventilation.

Vent lines should connect to the top (not sides) of the Holding Tank, and continuously slope slightly upwards to the Vent Caps, which are installed as high as practicable on opposite sides of the hull. The Vent hoses should be at least 3/4" diameter (larger is better), and as short (direct path) as possible.

__________________
Gord May "If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"