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Can these rads trap air even though they bleed water out of the bleed valve

Is a vented system

Can I just run through a few things. Because the flow is hot this sort of rules out an airlock? I will try balancing the system

Thanks I'll try again tomorrow. I think when I did turn all off bar that one the boiler got to temperature and cut off. I'll try again tomorrow

Thanks so the return could still be coldish but the radiator could heat as it is dipisatating most of the heat through the radiator

I did turn the others off and it started to perform better. Though I still wasn't getting much heat on the return pipe to it. I think the boiler cut out water at required temperature. I'm going to try again tomorrow. Just wondered if there was anything I could try

If no flow it wouldn't heat up at all?

Because the radiator is getting hot. But can feel much hear on the return. Water must be flowing through it

Any other ideas. Could it still be an air issue?

Yeah I installed the arrow so it flows through the correct way. The baffle forces the flow up the radiator heat is going up to the top of the radiator it is just struggling to return by the looks of it

Not great yet. The flow pipe is hot going too it. Then the heat has started to work it's way up the columns and through the radiator. However the return pipe is only Luke warm.

So I'm getting heat to the flow then the heat is working is way up and across the coloums. But the return is only Luke warm

Can column radiators perform ok on microbore? Would be 8mm copper

Is it ok to just cap central heating pipes it's the central heating pipes to an old under kitchen plythn heater. Was looking at capping with soldered or compression caps under the plythn.

Have a piece with a small scratch on it that isn't on a fitting. Not sure if needs replacing

Would a scratch on a plastic pipe need to be a pretty drastic to cause an issue? Imagine any scratches near on on were positioning a fitting aren't ok as would allow the oring to seal

Thanks id need to solder so don't think I'd be able to do with with bunging the system? I could freeze if can get access under the floor

Are this usually hard work with airlocks of drained? I'm going to see if I can freeze the pipework if can get under the floor. Is for a couple of rad/valve swaps

What size hole do you generally core the hole for a toilet waste so it accepts the collar of the waste fitting. The same for a 40mm waste pipe, so it attempts the collar of the fitting. Thanks

Thanks if I use solvent I will have to get the pipes through to the shower tray then pipe up when fit the tray. I would have to use two solvent 45s