Bay Pelican
Moderator Emeritus
Is it permitted to vent a day tank to the engine room as opposed to outside the boat? This is a small 6 gallon diesel tank for the wing engine.
Is it permitted to vent a day tank to the engine room as opposed to outside the boat? This is a small 6 gallon diesel tank for the wing engine.
Is it permitted to vent a day tank to the engine room as opposed to outside the boat? This is a small 6 gallon diesel tank for the wing engine.
Why not tee it to another fuel tank vent?
Ted
No. Not without a draw tube to the bottom of each tank. I'm at a loss to see how it could effect filling the main tank. My thought was to tee it in with a foot or so of the through hull vent. If there is fuel coming up there, you either have other problems or don't know when to stop filling....because it could create a siphon from the main fuel tank to the day tank, if the day tank has any sort of negative pressure relative to the vent line. This could be a problem while filling the main tank. Under most circumstances this might not be a problem, but it just takes a series of combined steps and it could happen.
Jim
A six gal tank for a wing engine sounds pretty tiny, but I guess as a day tank there is some method to fill from main tanks.
I couldnt find that overboard requirement in the USCG boatbuilding guide or a reference to it....and about an hour of research this morning in the CFRs/USCG sites.
The CFR that has that requitement is for T boats (commercial), and I easily found that.
Some ABYC "recommendations" have been incorporated into law, but not all.
Here is input from someone in the field....
"The legal requirement to comply with the standards cited in H33 regarding diesel fuel systems applies only to inspected vessels under Subchapter T (T-boats) or F (other inspected or certificated vessels) and do not apply to privately owned and operated recreational vessels.
That is not to say those standards are not a "best practice" but to say they are a legal requirement is misleading and may cause an owner to spend a great deal of money on needless modifications for no gain in safety or utility."
So I would be interested in a clear reference in the law.