I think on this subject it all depends!
I live near MAnchester and the inside of my kettle is as squeeky clean as it was 2 years ago when I baught it, but I still use distilled water.... or rather, water from my de-humidifier which gives me ample amount.
I know people who live locally who recieve the same quality of water who just use tap water on their steamies with no problems. I mean, I have a large scale 5" gauge Polly 1 (google it if your not sure!) and just use water from the tap at my local club, whats the difference? The size! The pipe's, cylinders and nipples are all bigger thus, it can take any bits of rubbish in the water more easily; this isn't to say it doesn't come with its problems. The clack valves can get a bit of muck in them and start to play up, but I will just have to put up this this, the thought of using distilled water in that sends chills through me. You think the 16mm live steamers use a lot of water!
My philosphy is do what you think is best, if you want to use tap water, do it! If you want to use distilled, do it! It all depends on ones geographical location, water quality and bravery!
<message edited by Dannysfod on 26/07/10 11:30 AM>
Daniel: "I'm going to go play with my trains later"
Friend: "We don't Play with trains! We are not children!"
Daniel: "Well I play with trains!"