In message , gastec
writes


the life expectency of a new pump is around 5 years...obviously some
folks get +10 years......the old commodor pumps amazingly seem to want
to outlive myself...im 35 ..old pump quality is vastly better than the
new....in Scotland Grunfoss is recognised as the best type of
pump....England with its Hard Water areas i believe are having problems
with grunfoss ????Its probable that youve just been unlucky.....


Seeing as the water in a CH system is basically the same water
circulating round (allowing for the odd bit of topping up) I can't see
the hardness of the water should be any sort of issue

BTW, you '.' key seems to be sticking.

--
Chris French