Hello friends. I'm a new homeowner getting to all the repairs, saving the hardest for last. I have a boiler with baseboard heating. I noticed one day that a ball valve was leaking. It turns out that the valve handle has broken off from the ball inside the valve body and I mean to replace this.
Now to my questions:
My system has no bleeder valves after inspecting all of the baseboard radiators. I can't isolate this part of the system to make the repair. The best I can do is isolate every other zone.
1) Should I just drain and flush the entire system? Is this good practice? The house is 10 years old and this probably hasn't been done. There is no AF in the lines, and even if there is, nothing is in danger of freezing so I don't care. Should I? As far as I can tell, everything is copper. Do I need to add any sort of anti-oxidation stuff?
2) How do I drain the system completely without bleeder valves? Do I even need to drain the system completely or is it okay for there to be water in the line as long as it is several feet from where I intend to solder?
3) Once drained and fixed (hopefully) how should I go about refilling the system? I assume one zone at a time with a hose hooked up to the outlet on the return side and just run water through each loop like mad to get the air out?? This will still leave a pocket of air on the other side of the spigot after I shut it off. Will this make it back up into the loop and cause problems or will the pump be enough to move the air bubbles through to the air vent?
I've watched a million videos and none of them seem to match my scenario