I posted here recently about a noisy boiler. Well, I fixed that with
some Fernox noise suppressant. However, as soon as I did that, the
pump has started making a noise. It's a very loud vibration, which to
me sounds like the bearings could be on their way out. It only does
it after running for 10 minutes or so, usually when things fire up in
the morning. When it cools down, it's fine.

1. Could this have anything to do with the noise suppressant I put in
the system? The noises started only a day or two later.

2. How long between the pump making these noises and the thing going
tits up? I'm about to put the house on the market, and I don't want
to shell out for a new pump unless I have to. OTOH, I don't want it
rumbling away while I've got a potential purchaser looking around. Is
there a cheap and nasty bodge to keep the thing running quietly?
--
Hugo Nebula
'What you have to ask yourself is, "if no-one on the internet wants
a piece of this, just how far from the pack have you strayed?"'