Balancing rads help.....

[marshian]

11 minutes ago, Dee said:

The second image are the style I have.

I'll look into those valves...thanks for a great peice of info and advice!

Not a problem - you shouldn’t need diverters for those rads (OK they are column rads by name but not in the modern sense)

 

Just for giggles this was the view into the bottom tube of the column rad in my bathroom  (first picture)

 

So poor manufacturing tolerances meant opportunity for water to go straight thro from flow in to return out rather than be forced up the columns