Yellow/Brown water from hot taps

[mowgli]

It's cleared up or it keeps running yellow?

It keeps running after 10 minutes but is still yellow.

 

[mrlennie]

try leaving it running for longer say half hour if you have alot of rads it will have to empty all them too

 

[tamz]

Any ideas:

I think you need better plumbers.
It won't be disturbed sediment if it has been done more than a few days. Better to get someone else in who knows what they are doing. They will tell you within 5 minutes what it is.

 

[mowgli]

Thanks all - quick update.
Plumber is coming today.
After running hot water yesterday for over ten minutes the hot water today is a lot clearer with only a faint yellow tinge. Could the yellow tinge have been the Sentinel 100 getting into the hot water system somehow and now flushed through....leaving the rads unprotected?
However struggling up into the loft again I found that the F&E tank is still just about empty but looks like the float arm needs adjusting.
Took back the lagging again over the new pipework to find that the new flexible pipes had been teed off two copper pipes (hot to touch). Their location and direction means that they can only be part of the central heating system.