thanks bengasmen for your reply. Firstly a slight error in my description in that the towel rail is as said through the central heating but has 2 adjustable "radiator type control valves" which i presume are inlet /outlet so not actually trv's.
the pump has multi feed written on it. basically...
the heated towel rail in our upstairs bathroom has over a period of time stopped working. it is a standard through the central heating model with 2 trv at the bottom and a bleed valve at the top left.
The central heating system is non -combi with a multi feed punp in the airing cupboard by...
