Disconnect incoming live and neutral. With multimeter,test resistance across element terminals, should be 18-20Ω .
cylinder 2 photo
4000 drips=1litre (random google )
30 drips/h 8 hr htg day 6months/year
OK, rough and ready, but we're not talking cubic meters...
Equates to 11 litres per year onto a surface that gets rained on anyhow.
Is this really worth the concern?
"valve that looks a bit like a TRV with a sensor" ="Cyltrol valve"
Still available but, as Muggles says, the concept is pretty old hat.
If the OP means the Sandringham 21 Magnia Low Level Toilet
the flush pipe can be shortened as Madrab says.
You could chase in but more practical would be exposed 15mm copper pipework or 10mm copper in mini trunking. Aesthetics vs installation time...
I've done this in a similar situation (tiled ground floor).
O.P. If this is still in any doubt you could replace one of the ground...
Grip the blue round knob under the boiler and turn gently (clockwise as viewed from above the boiler, anticlockwise viewed from below) until you...
1 replace pressure relief valve and
2 repressurise expansion vessel
Halstead Ace/Ace High PRV widely available at prices varying from £10-£50...
It may be that the pump in the pic is for secondary circulation(hot water to taps); isn't there a settable clock under the cover?
It's in the FAQs.
Certainly plausible, tho' it would be the expansion air bubble contracting rather than the water itself.
What happens if you repeat the test but...
Why do you think this? Repairs are a doddle on three part syphons.
Won't be a problem.
Yes, with the gender diversity legislation one has to be so careful these days..
Recommend sliding nut and olive onto pipe before inserting insert!
I disagee with the consensus above.
There are some boilers with flakey circuit boards which don't like being powered down.
And there's a good chance that that the washer will have welded itself to the brass seating anyway. Nasty \\\\\\\ ///////things
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