I'd discourage anyone from using a hardware store spigot for potable water cans. Kinda defeats the purpose of using a food grade container for potable water then slapping a hardware store spigot on it
I knew when I posted a photo of a brass fitting on a water can that it would bring this admonition.
Everyone is entitled to one's viewpoint. Mine is that in the context of potable water containers for camping and recreational use the avoidance of brass fittings is buying into nanny state nonsense. The low lead fittings pictured were fully approved for use with potable water until January 1, 2014 when by legislative fiat they suddenly became dangerous and something to be avoided at all costs. Like 60w incandescent light bulbs and 1.6 gal./flush toilets.
In reality, even in the context of a household system where there is constant contact between the water supply and a brass fitting, and even in the worst cases of leaching from high chlorine content, if one runs the tap for just 1-2 seconds it flushes out the small volume of water in and around the fitting that might have accumulated some measurable trace of lead. The moving water can't pick up enough lead to be measured.
The brass fittings in the Rotopax can pictured are not in contact with the water inside unless water is flowing through them or the can is stored on its side. Since the can is stored vertically there is no direct contact with water and the risk of harm from lead poisoning is zero. Even if stored on its side for an extended period, or in the case of a container with brass spigot at the bottom, flushing the valve with just 1/4 to 1/2 cup of running water restores the risk of harm to zero.
That being said, I have no issue with those law abiding citizens who would prefer to use certified "food safe" fixtures and plastic valves. As you can see from my first post in this thread I used a plastic spigot for my Wavian/ProQuip water can. For my Rotopax can I proudly chose brass.
YMMV