Neale,

Joke appreciated, but it's a very modest sized aquarium pump. I don't think any other voltage option was available locally when I set up this machine back in remote Western Australia and delivery times for mail-order were typically anything over 14 days so I used what I could get. Plus I spent most of my working life mixing up to 40,000V with water so perhaps I'm biased.

But think on this: The 240V brushless pump motor coils are fully encapsulated in plastic, the heavy duty 3-core mains cable is fixed in place and I don't often hold it in my hand. It doesn't get bent and twisted every day or trodden on and if the 240V does escape through the pump it will connect to the cooling circuit which is flowing through the spindle which is solidly bonded to mains earth and I have an RCD in my shed mains supply.
Now compare that installation to the cheap-shit 2-core mains lead on your wife's/daughter's/granddaughter's hairdryer.

Link to previous discussion on cooling pumps and the effect of pipe diameter on flow rate:
http://www.mycncuk.com/threads/12791...cooled-spindle