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Old 08-07-2019, 08:03 AM   #1
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Fuel Tank Manometers

Past discussions on this Forum have considered manometers for indicating fuel contents in tanks. No doubt reliable, simple, and effective, this is why we shouldn’t be tempted:

https://maritime-executive.com/artic...nger-boat-fire
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Old 08-07-2019, 08:18 AM   #2
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Just remember diesel does not burn and its safe...cant be lit with a match..., but the fumes sure can stink, exhaust and otherwise, sure, ok.
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Old 08-07-2019, 08:29 AM   #3
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I used polycarbonate tube (narrow bore) with shut off ball valves top and bottom. Since I thought many (most) fuel valves are ball valves, what are the preferred options for sight "glass" valves. PC melts around 250C but fuel volume was only a couple of teaspoons. Not sure what a better practical alternative is. Even using real glass tubing still requires use of seals that will likely melt/leak when subjected to 250C.
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Old 08-07-2019, 09:30 AM   #4
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On any boat I have run, I leave sight level valves closed except for reading level, then back to closed.

I this case the fire had to be pretty bad already if it burned that sight tube. Not sure the sight tube bit would have changed the outcome that much.
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Old 08-07-2019, 09:43 AM   #5
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One of the many things that I want to do on my boat is to add valves at the top of my sight tubes. There are already valves at the bottom. They stay closed unless I am checking the fuel level.
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Old 08-07-2019, 10:30 AM   #6
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Quote:
Originally Posted by sdowney717 View Post
Just remember diesel does not burn and its safe...cant be lit with a match..., but the fumes sure can stink, exhaust and otherwise, sure, ok.
I do not agree with the diesel does not burn statement, Diesel is safer than gasoline but believe me diesel will burn. Basing my statement on both the shipboard fire fighting training where diesel was used as the fuel and the actual maritime diesel fires I responded to in my 28 years with the Coast Guard. Diesel vapors in an enclosed space can become explosive.
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