What's the best make? And possibly one that can be repaired when it starts
leaking?

I've got Invensys ones (Drayton), which I've had for 18 years

Crikey. Mine seem to average about 5. I've had several different makes,
but just the sheds own brands.

I fitted Drayton TR4's almost 7 years ago when I did our CH, not had any
problems with any of them yet.


B and Q - £5 odd - noisy from start leaking after 6 months - changing to Drayton

Nick