I said before I wanted to se what happened at the w/end as it was prev w/ends I had the problem .
Last night ( Fri) I went to bed and the pressure gauage was showing 4 Bar ...all week the elec shower has been working perfectly .
This morning around 0930 hrs it was showing 1 Bar and listening to the rising main behind the p/board I could hear water running so someone or something was drawing off cold water . It is now 1045 hrs and still I can hear water running and the pressure remains at 1 bar and the elec shower will not heat up ....same as last w/end .
It's unlikley to be anything deliberate after all that time so I'm trying to suggest to myself what it could be . Could it be a toilet overflow operating . There is no overflow ejecting to the outside so it might be a toilet with an internal overlow but would that make the pressure drop so much .
I'm open to suggestions .