Fuel tank regulations

[6string]

I am replacing the fuel tank in my Baba 40. I will now have three tanks, a Day tank that the engine will run on (25 gallons) and 2 storage tanks. ( 50 gals.). I was planning on running a new line from the deck for filling the day tank. The current supply line I was going to run to a diverter valve which would allow me to choose which of the 2 larger tanks I want the fuel to flow to. I was told that regulations require a seperate fill for each tank. I was also going to have each tanks vent line go to a seperate LG 100 before combining into one line going out of the boat.

Is there any one here that knows about these regs and if this would be correct? Do any of you have a valve that allows you to choose between which tanks you are going to fill?

Thanks

Jeff

[Pblais]

There really are no "regulations". There are standards. I'm not aware of regs any that cover that. Short straight and as minimal lengths of fuel line would be the best solution. Extra connections, valves, and anything not straight is an invitation to air leaks or worse.

My own opinion is more tanks is worse than fewer tanks. It's not easy to make one big huge monster tank so splitting it up helps weight distribution. I'm not a believer in "day" tanks either. It all ends up some place. On a 40 ft boat you have no problem with too much fuel because you can haul enough to hit the radar screen.

Complicated fuel systems with small tanks (less than 1000 liters) are money down a rat hole and complexity you don't need or want. You area sail boat that uses an auxiliary engine.

Trace an air leak once and you can understand why. You are one person without a crew to send off chasing such details.

[Chief Engineer]

Is this an identical thread that was done about two weeks ago?

[cal40john]

Essentially.

http://www.cruisersforum.com/forums/...nts-21973.html


John