It maybe that the olives on the valve were not soldered properly as mine were not , I had to resolder the olives to make it sound so it wouldn't leak past them.
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I did send my old four way Rover balance valve back to Nick for refurb when I bought a new one from him - so if anyone needs the footwell valve for the Rover, he should have one in the pipeline.
Good man.
Recognise it?
https://www.ebay.co.uk/itm/196173273...8AAOSwtP9lmVWF
Daavid