Hi Norm

I agree with you that its like it is the pipework. Will drain the system and see how it is

Found the invoice from 2015 when it went in - usually only last 5-6 years with the last Dux Sh*t*er lasting Jan 14 to Dec 15. Warranty refused.

As its coming up to 5 years in December, I keep feeling the end is nigh. Plus, I would prefer to do the research, get a good deal on a quality system + install as opposed to running around after its blown up

The one in there is actually a 'Thermann' not Dux - probably because the previous Dux one died that quickly. These are electric by the way.

Shows how much attention I pay it - I can't even remember the brand. I turn the pressure purge taps once a month to stop them seizing, thats it.