dual fuel tank fill

I am building a boat with 2 fuel tanks (gasoline). Can i use a single fill with a t?

 

You can but is it a good idea?

Probably depends on the nature of the installation.

Do you have any pictures of the project?

 

dual taks single fill

i have pictures, but can't figure out how to insert them into the thread

 

I have saddle tanks and would like a single fill on the port side. I figure if I keep the "T" low enough It shouldn't be any different than filling a single tank. . Tank inlets are tight to the transom as are the pickups.. I'll send a couple of pix if zi can figure it out

 

collector

You can make a collector.Like the attachment.

 

here are some pix (I think)

 

Not sure what you mean by "low enough" but I would never have any outlet or connection on the bottom of a boat fuel tank. Any problem there would flood the boat with fuel.

 

Some simple rules apply to gasoline fuel tanks but one of the most important is no fittings are allowed below the top of the tank. This prevents fuel leaks. Most fuel leaks are from fittings, so if you have no fittings on the sides or bottom of the tank this eliminates potential leaks. This pretty much precludes having a connection low on the tank to fill them both from the same fitting.

You can find out more about fuel tanks here. http://newboatbuilders.com/pages/fuel.html

If you can devise a single inlet fill that then splits to go to both tanks that would work as long as they go to the tops of the tanks. But frankly it would be simpler to have two fills, one on each side of the boat.

 

Ike is correct. Not practical to use a single fill on two gasoline tanks.

You could use one fill with a manifold with two valves... open port valve...fill port tank, close port valve.... open stb valve then fill stb tank.

Sounds like trouble, too much plumbing and an easy way to make a mistake and spill gas.

 

If you were going to do this I would think a three way valve would be a better option. At least that way there wouldn't be fuel caught in the area between the two valves. But frankly I don't see the advantage over having two fill caps.

 

Cheaper, fewer holes in the boat, less connections...