I'm looking to eschew the siphon hose bundled with my AEV fuel tank.

I'm thinking I'd like to place a fitting in the bottom corner of the tank with a compact valve and maybe some kind of quick disconnect. This seems like a lot less hassle than the jiggle hose siphon setup. Plus would allow for better emptying of the tank.

Problem is I'm having a hard time finding the fitting I want to pass through the tank wall. I need it to reliably seal around the hole I'll be putting in the plastic tank. I'm not sure exactly what that is called. I found lots of bulkhead fittings designed to pass a line through some other wall/bulkhead, but nothing specifically to use as a tank drain... (other than some petcock style one that turned up in my searches)

Someone show some mercy on me and fill me in on what that fitting would be called. Can't really Google it until I know what to call it.

It's a type of bulkhead fitting, but you're looking for an o-ringed tank fitting, and here's one I've used that's brass with a Viton o-ring: 1/4" Brass Bulkhead Fitting | 10897

Here's a close-up of that fitting for reference:



With a good fitting installed, leaks may only appear if the plastic creeps and lessens compression on the o-ring - may not happen, but I'd keep an eye on it.

That's almost exactly what I'm looking for, but in 1/2 inch. The site you linked only has 1/4, bummer.

Something like this would be perfect, only rated for fuel.

I personally wouldn't trust a rubber expansion plug in constant contact with gasoline.

The only thing special about the fitting I linked is the O-ring groove under the head of the "bolt" half. You could take a regular brass 1/2" NPT bulkhead fitting and have the o-ring groove turned in, or run a bonded sealing washer under the head on the inside.

As long as the bonded sealing washer (AKA Dowty seal) is rated for gasoline (i.e., Viton or similar rubber), I'd trust that setup for the long haul.