Whats next ?

Buffy330 said:

Wow , gents thats a hell of lot of replies , and I thank you all for your input.

To clarify , I inherited this mess , and much of the original downstairs install was buried directly into concrete.

This is no longer the case , and all flow/return is 22mm now under the floor, but isolated from the concrete and new copper..
Digging it all up again is not currently an option Im afraid.

There were multiple branches coming off the flow/return where it emerged in the upstairs airing cupboard.

This is now one flow/return circuit , all in 22mm.

Thanks to some good advice , that went back to basics , I found a substantial blockage in the system , which to put simply , was preventing any circulation , and causing a great deal of noise.
Prior to this , the system has unfortunately caused a lot of head scratching and varied opinions to cure.

I have literally just downed tools after removing the blockage , and adding a good quality filter.

Result , ALL rads are so hot I can barely touch them.
I have installed a couple of litres of X400 system clean , and will drain down again in a week or so , flush out than add X100 inhibitor.
The system is now also silent.

Then I will balance the system and fingers crossed can say good bye to a problem that has plagued me for years.

Is there a moral here ?
Look at the basics , then move on from there .

If I need to replace the boiler in the future , I will be looking to Hydrogen of an Air source heat pump , if it can be made to work here.
I really dont feel in my opinion , than I need to go any bigger on pipe sizing and getting rid of several old legacy systems has also helped no end.

It just leaves me to say thank you for so much thought provoking input.
Had the unblocking not proved a success , then I would have had to work through the options as stated.

Thank you

Steve

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