metal fuel tank

[DA Miller]

I'm building a metal fuel tank and would like to use std bathroom fixtures for the filler tube and cap, but I'm having a problem selecting the pieces. Any help would be appreciated.  Also once the pieces are selected how are they attached to the tank?  I need some help with this.

[Terry Lundby]

Here is a link to a great site, much information here. https://bobhooversblog.blogspot.com/2006/12/av-yo-fuel-tank.html?m=1
Look up Tony Bingelis on the EAA site. He wrote about the nuts and bolts of AC.
If you're going to go to a metal tank learn about NPT fittings and AN hardware. A leaky gas tank is not a pleasant idea.
Best regards 
Terry.

[GTS225]

Will the tank be steel or aluminum?  Most household plumbing fittings are brass, so you could braze that to steel, but not to aluminum.

Personally, I have to agree with Terry....a gas leak of any kind is NOT a good thing.

Roger

[DA Miller]

This is dthe 3rd time I've tried to reply! Somehow I* hit a wrong key and it all disappears. So I'll make it short and sweet: I'm familiar with the Hoover blog.  I'm also fairly familiar with the blue AN HW. It's an Al tank. I searched Lowe's to day for a 11/2"d metal pipe with threads on one end. NO METAL PIPE.  Found TWO PLASTIC PIPES AND CAPS THAT MIGHT WORK if I can figure out how to attach a flange to the end. will try some of these new glues.  Tanks again,  Possum

[GTS225]

PVC is not a good thing......gasoline will break it down over time.
You might want to take a look at electrical conduit.  There are threaded hubs or flanges that bolt onto a service panel, and they are sized in 1-1/2" pipe thread (plus other sizes).  A bonus is that they're aluminum.  If you combine that with an "IMC" conduit nipple and cap, that might do what you want with little weight penalty.  I can not say how it might be to weld it, though.

Just brainstorming.....Roger

[DA Miller]

Thanks for the heads up on the pvc and gasoline. I"ll take a look at the conduit. I did find a 6" x 1 1/2" pipe with threads on the end and a nut at my local ACE hw. Also a 4 x 8" x 0.032"brass sheet. If I can braze a brass flange on the pipe I'll be in good shape

[TezzaT]

Hi DA, I purchased mine from this outfit on Aliexpress. Aluminium weld in fuel cap & tube! worked great. Just had to tap 1/8 NPT for a breather fitting. Available in several sizes,
Terry. XL now flying.

https://www.aliexpress.com/store/832242?spm=a2g0o.store_pc_home.pcShopHead_11132524.0

[DA Miller]

Hey TezzaT, thanks for the input, but I think I have mine worked out.  I'm going to solder a brass flange to the 6" pipe and cut a matching AL flange for inside the tank.   I'll shorten the 6" pipe. Then rivet the three together. It will be AL flange, Tank top, brass flange.