paul_j_tomlinson wrote:
I have had problems with heated towel radiators and tall bathroom rads
that don't get hot at the top and wondering if this is due to height of
header tank.

Have you tried bleeding the radiators?


The distance from the water level in the tank to the top of the tallest
radiator is approx 1 metre.

Would this be sufficient ? I have 13 rads and 2 heated towel rails
(heated off hot water circuit)

Should be fine.