In message .com,
Graham writes
Vaillant VCW GB 242E - replace pump ?

The boiler is a good 10 years old, when installed, ended up with a
spare circulation pump . now the original pump's ran for 10 years ,
and is still working ..

Question is , would fitting the 'spare' improve anything ? I assume
the original pump cannot now be 100 p/c ..

ok if its working leave well alone .. but might as well get some use
from the 'new pump' ?

If it's working, leave it alone, why change it ?

or do you have secret masochistical tendencies ?

you'll prolly end up with a leak

... hmm, there are websites for that too (so I've heard)

--
geoff