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Old 10-05-2019, 08:41 AM   #4
ranger42c's Avatar
City: Maryland
Country: USA
Vessel Model: 42' Sportfish
Join Date: Aug 2013
Posts: 4,684
Originally Posted by Andiamo2018 View Post
It doesn't sound like holding tank air vent filters help much.*

Noflex is said to help and I'm starting that this weekend after pumping out to calibrate the above level monitor.

Does anyone else get a disgusting 'burb' when you starting pumping out? I have to remember to open the valve on the pump out hose reaaaaaaaallllly slowly to avoid it.

We have a holding tank vent filter; gives some respite to our boat neighbors when we flush... so we don't knock them off their boat with our odor. Doesn't seem to make much difference to us on our boat, until after the 3rd or 4th year when it signals replacement might be in order.

Can't tell if NoFlex does anything or not. We use it, as directed, but we didn't have toilet odors onboard either before or after. We used to use KO for that purpose (NoFlex is easier to dose) and never noticed toilet odors either before or after with that, either.

Where's your "burb"? Outside the boat, perhaps at the vent fitting? Or inside the boat? Or...?

South River, Chesapeake Bay
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