details on last bit of topping up baseboard loops.

swvawethead

Deleted due to excessive rambling.

(This is for one loop that seems to not fill with the fast fill/drain/boiler isolated-bypassed.)

swvawethead

With apologies for my first rambling note please tell me if this will work.

With the system cold and boiler isolated and all zones closed except for the loop in question, fast fill the loop and open the bleeder to help push out the air. I suppose it would be good to have a helper at the fast fill to flip it back down for me when needed.
Just within the pipe loop itself with boiler bypassed not sure if it is safe to leave fast fill unattended while I am upstairs working the bleeder.

swvawethead

After working through both of my rambling questions the question boils down to:
Can a loop that is isolated from the rest of the system - including the boiler - safely handle city water pressure with the fast fill open while I work three bleeders for a few minutes?
I suppose if there is going to be a leak this is when it will be discovered at several locations such as the three bypass valves.
During earlier fill sessions (that included filling the boiler) the pressure would easily reach 20 psi and take a long time to creep up beyond and to 25 psi.

swvawethead

If I am working solo, maybe I can open/close the fast fill for 10 seconds or so to 'charge' the loop, then work the bleeders and repeat the process as needed.