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It could be I could swap the flexis? For copper there usually M12 of kitchen taps?

I have a tap that has black bits coming out of the cold side of the kitchen tap. If it was the washer breaking down the tap would drip? Any ideas what it maybe?

I need to cap some central heating pipes in a boxing. What is best solder if can get rid of all the water? Speedfit or compression? Thanks

So shut most of the other rads back to only quarter of a turn open?

Thanks I have some temperature gauges. It's mainly 2 rads on the end of the system that are struggling. I have had all rads of and they get boiling so an air lock isn't an issue

Is the hope to get 12 degrees across each rad. Does anyone used temp clamps to do it?

This is a big system 14 rads and underfloor heating. I just wondered how far you are ment to throttle the rads down that are getting hot first.

All the rads do have trvs

When balancing rads. Mainly the upstairs to throw more heat downstairs. How far down should you throttle the locksheilds. Is a quarter of a turn open enough? Thanks

Leak out of the slotted on/off bit?

Are iso valves really that bad? If fitted on a drop to one radiator. As the internal bore of the rad valve is tiny.

Pipe rad up and use push fit or compression as last fitting on to existing?

On the drops the water should stop enough when drained down to solder?

It's an Splan system maybe Splan plus with the central heating zones.

Thank you. It does have an auto air vent

The rads are piped from drops. So thought may not effect the underfloor heating circuit?

I'm draining to swap a couple of rads downstairs.

Is there anything different I need to do when draining a central heating system that has underfloor heating on one side downstairs? Also for refilling thanks

Thanks would you seal between the sockets with anything?

Thanks so no to confirm you wouldn't try and cut a tile for between these two sockets?