Radiator heat - bamboozled.

[asnoop20]

Yes they are crap at giving out heat I agree with you on that!

Anyhow good news all rads are now balanced and hot. I have no idea how, either there was some blockage (I didn't see anything) or the squirtiness through the boiler meant air was previously staying in the pipes somehow and not coming to a rad top, and affecting the balance. It's a mystery!

 

[Madrab]

Anyhow good news all rads are now balanced and hot

Good stuff.

Sometimes all it take is for things to stabilise, as you say - a little restriction in a pipe to move - or a sticky valve tweaked and things start to settle out.

 

[asnoop20]

Good stuff.

Sometimes all it take is for things to stabilise, as you say - a little restriction in a pipe to move - or a sticky valve tweaked and things start to settle out.

One thing I did wonder is if overdoing it with flux and solder how much can go inside and start restricting the flow. It seems unlikely but there are times when you go overboard unsure if the solder has flowed etc.

 

[Madrab]

It can yes, 2 things that should avoid that.

1) only flux the pipe, not the fitting, so any excess flux is pushed out, rather than pushed (edit) in.
2) only use the right amount of solder with end feed, good rule of thumb - use the same length of solder as the diameter of the pipe, no more, just make sure if flows fully around the pipe. I have a small inspection mirror in my bag that I can use if I'm at all suspicious it hasn't but I've been doing it so long now I do it all without thinking now and know that the solder has flowed all the way around.

Yorkies are a good alternative for DIY soldering, extra solder isn't needed, no matter what anyone says IMHO.