Something like an eversible bilge pump?
Brian

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This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Martin Pentreath" wrote in message
...
Hi all,

I have a intergas boiler with a developing limescale problem on the domestic
hot water side. Taking the heat exchanger out looks to be impractical, so I
thought I'd try the alternative technique of circulating descaler through it
in situ by connecting up a pump and a bucket of DS3 descaler to the nearby
hot and cold washing-machine valves.

I can easily pump cold water through the heat exchanger this way, but as
soon as I introduced hot water (by pouring it into the bucket) the pump gave
up. To be fair it was the cheapest drill-attached pump I could find:
https://www.amazon.co.uk/Wolfcraft-2.../dp/B0001P1972

Any suggestions for a pump which is up to pumping hot acidic water?

Cheers!

Martin