Re: Holding tank vent line
The holding tank vent fitting should be located above the holding tank and above the
waterline at all angles of heel.
It should also be no less than 24 inches away from any opening into an accommodation space.
Form a gooseneck in the vent line, above the vent fitting to prevent seawater from
back flooding to the tank.
Ensure that the holding tank vent line has a constant rise from the top of the tank to
the vent fitting. Otherwise low spots may fill with sewage and act as a trap,
effectively plugging the vent.
Vent lines should be as short as possible.
"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?"