Got my immersion heater fitted with mechanical flange. All went to plan, no leaks, really neat etc.
However, I tested it yesterday for two hours & I'm not sure it's actually working. Water didn't feel any warmer, not bubbling from element etc. but electric metre was spinning fast so power was being consumed!
![Undecided :-\](http://www.cleanitup.co.uk/smf/Smileys/classic/undecided.gif)
The immersion in my hot water tank (domestic) makes a noise like a kettle when it's on but the one in my tank doesn't make a peep!
Anyone?