Why the andair valve? It looks nice, but I already have the vans one and it seems like it's all I need. It's just a simple valve.
I was in exactly the same spot as you. I was just starting the plumbing when I met a guy who flying his third RV build and out of nowhere he asked which fuel valve I was going to install. My answer was, "The stock Van's valve, why?"
He took me over to his hangar, where he had the interior ripped out. He said he replaced two valve on his second RV and when the first valve on his current one became stiff to turn he decided to replace it with an Andair valve.
The replacement required new fuel lines because they don't line up. He handed me the Van's valve followed by the Andair valve. The quality difference was amazing, it wasn't just a pretty face.
A number of the Van's valves have gotten "sticky" and difficult to turn with use and more than one plane has landed at other places than their destination due to valve issues. Granted, you can keep an extra one on your shelf and change it out at the first sign of trouble or you can install a quality valve and never worry about it again.
Yes they are expensive but in my mind, that is one place where your money is well spent! After all the money we pour into our planes, I can't believe someone would risk their investment on a $53 part that would best be utilized on a boiler rather than a quality aviation part.
Here is the link to Van's catalog for the valve. The quality difference is very obvious in the picture (as is the price).
I gave my original valve to a member of this forum who was replacing their sticky valve.