coating lead solder

[just sayin']

Thanks for the explanation!

[just sayin']

I would love to see a cut away drawing because my old thick skull is not as sharp it once was.

[Pikey]

I would love to see a cut away drawing because my old thick skull is not as sharp it once was.

Sorry js - missed your request.

Here is something very similar with diagram a little way down the page.

http://www.gasapplianceguide.co.uk/Newark%20Cylinders/Newark%20Combination%20Copper%20Cylinders.htm

on mine, the immersion is at the top and closer inspection of mine shows there is no calorifying coil on this unit. The connections are plugged.

[zedzedtop]

Lead can only be ok in water pipes when the pH is high, certainly well above wash pH. I wouldn't use it. However, I wouldn't expect any lead compounds that might form to have relative volatilities near what we're after. So, you might be fine if there isn't any once the lyne arm (or equivalent) descends.