Peggy, I know that you recommend using a 3/4" vent line, but what type of fitting do you put on the hull? All of the vent fittings with screens that I have seen are for ~ 1/2" hose. Thanks, Stan
Screens on holding tank vents cause more problems than they solve...'cuz they get clogged up with dust, pollen, etc,..corrosion 'cuz they rust out very quickly...waste in the event of a spill. An open fitting allows more air exhange, and makes it much easier to backflush the line when you wash the boat.
Peggy, I trust your judgement completely, it is just that I have heard of bugs inhabiting your holding tank. I don't know anyone personally though. Is it a real concern or just an old wife's tale? Thanks, Stan
Stan: Depending on where you live (area of the country), this can be a problem. We have spiders and mud daubers. They like to use the vents as a nest. This is why I back flush the vent hose on the head every time I pump out the holding tank. I also let me water tank overflow to flush it out too. On my fuel tank I sometimes need to clean out with a stick or something.
can get into a vent line and get stuck, but the odds of it happening are far smaller than they are of a screen becoming clogged or waste clogging the vent at the tank fitting. And with or without a screen, dirt daubers like to build nests in all through-hulls, not just holding tank vents. Which is why it's so important to check all thru-hulls regularly and backflush the the holding tank vent line every time you wash the boat. However, I've NEVER heard of any bugs actually taking up residence IN a holding tank.
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