So I've searched this topic and not sure if I'm finding the answer I want. I've got saddle tanks with vented Rex marine caps that have done nothing but create headaches for me. Water in the tanks constantly being that my boat sits low and when I turn I get alot of water that runs over the side. So the first thing that I've done is to drill into the rubber filler neck and silicone a barbed 3/8" fitting into it. My thought is to run a hose from tank to tank around the back and at some point cut in a tee and put an external vent in. I have a perko vent. I'm not sure where to put the vent or if it will even work. Any advice would be great.


Sent from me to you at SoCal Jet Boats!

Well, here goes.

Silicone does NOTHING against gasoline. So I don't like that. Second, the vent should be forward of the fill (being as the bow is higher than the rear).

Is there any way you can get a piece of pipe between the fill and the neck of the tank?

. The double barbed piece went in super tight. I used ultra black just to help keep it in. Not sure what you mean as far as a pipe between the fill and neck. I'd sure hate to have to pull the tanks to drill and tap them. They are glassed in.


Sent from me to you at SoCal Jet Boats!

If you could get even a 1-1/2" piece of pipe between the filler neck bottom and the tank neck top, you could have a bung welded into the pipe and have a very solid piece.

Threading something into hose is somewhat sketchy in my mind.

Why?

I personally would run each one forward a bit and as high as humanly possible. I really don't see any value in tying them together.


BTW, that is exactly what I was talking about, great job!

I think it will work out fine. Be sure to put a vertical loop in the vent hose between the filler and the vent fitting.


GT