one or two petcocks?

Joe, I ASSOOOOme this Tannermatic tank you speak of has a "saddle" that allows the tank to conform to the backbone of the frame and thus has two separate and distinct low spots, on either side of said "saddle", from which to draw fuel....Is this an accurate and safe assumption....


FR

I was thinking that for the sake of more complete drainage and usage you want both sides to drain. And to a degree, redundancy, although it's hard to imagine one side getting clogged for some reason, but if you only have one side draining, that's all it would take.
My XL600 tank just has drains on each side that I tee into a single valve like the ones pictured...so I guess it doesn't have a "petcock", just drains and a valve.


FR