On 22/10/2019 11:19, T i m wrote:

So I've ordered a complete new head and can test that on the old valve
body, before draining down, flushing then draining again and replacing
the valve itself (n refilling / inhibitor etc), when the weather is
right (mild).

If the valve is in the loft near the high point of the system you may
get away with partially draining a small amount of water. This may save
you extra hassle if when refilling you get air locks etc.


--
mailto : news {at} admac {dot} myzen {dot} co {dot} uk