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I read in the plumbing and FDA codes that water tanks are required to have vent strainers to keep out bugs, and that they be angled down to keep out dust. But I've seen many boats where neither is fitted.
I've seen some where a strainer is incorporated into the through-hull, but more where the vent is a simple mushroom fitting. Are internal strainers ever fitted? I'm sure external strainers are often omitted because the vent is also the overflow, and if they were clogged from the inside, these cannot be cleaned. But I'm not sure that is a sufficient reason for no strainer at all.
I wonder because I occasionally find a bug in the tank, and that seems, well, stupid (my boat has no strainer).
I've seen some where a strainer is incorporated into the through-hull, but more where the vent is a simple mushroom fitting. Are internal strainers ever fitted? I'm sure external strainers are often omitted because the vent is also the overflow, and if they were clogged from the inside, these cannot be cleaned. But I'm not sure that is a sufficient reason for no strainer at all.
I wonder because I occasionally find a bug in the tank, and that seems, well, stupid (my boat has no strainer).