Why is a purge assembly never shown on manufacturer's piping diagrams?

Alan (California Radiant) Forbes

It's such an easy thing to pipe and definitely THE easiest way to purge air.



This is only one manufacturer, but they all seem to leave it out.

dopey27177

Sometimes you need to deeper into the product. Not the circulars or adds,

Jake

hot_rod

if there is a circ inside the boiler, pumping into the boiler, I would rather see the check on the supply to the closely spaced tees. Not ideal having a check on the inlet side of a circulator.

jumper

Best is old style expansion tank at high point. Pressure created by gravity rather than compressed gas. Where does air continuously come from and where does water go to?

rick in Alaska

I'll answer your question. Because I think Dan must have patented it! Seriously, since reading his book, I have piped every one of my jobs the way you have it sketched out. More or less anyway, but mostly this way. I like to have the ability to be able to push every bit of the air out from one location, and to not have multiple purge valves all over the place if I don;t have to.
Rick