dpmiller

source for that info?

request a survey through their developer portal. In my experience it'll probably cost you a couple of hundred quid but it'll get roadblocks shifted.

how long does it take the protective chlorine in mains water to dissipate?

Is the earthing then for galvanic or lightning protection?

Same here, yesterday. Whole tank above 90c...

I wouldn't overthink it tbh, they just... work.

yes, they cycle on and off, kettling away happily. And have done for decades. Elements last a very long time as the base-down orientation keeps the electrics cool...

standard 3kW element @SteamyTea

no it can't get plugged. the tank would need to be hotter than the output of the willis for that to happen aside/ you can however if you're careful use the willis as an instantaneous- once it's on for a minute or two, opening a hot tap gently will take the flow *through* the heater...

^ yes. whenever the water entering the willis from the bottom of the tank is hot enough to trip the stat, the whole tank is hot and no more energy will be requested.

thermosyphoning is exactly how a Willis works. It's why we love'em here in NI- piping-hot water to the top of the tank in minutes for a quick basin of dishes, or a whole tankful for a bath in an hour. You don't need the stat set too high to get the flow going either, so I'd opine it would match a diverter well.

Absolutely. But it would be *incredibly* bad luck for both the 'stat's redundant overtemp AND the T&P valve to both fail.

I can't say I've ever thought of accurate calibration as a risk of any kind, moreso when there's a failsafe anyway...

does the temperature drop overnight?

my VOIP provider ported the number from BT for a small fee, and I'm using a Cisco SPA232D ATA and our previous analogue phones.

work out how many kWh you're putting in during your heating period vs how much it would take to heat the whole tank

heat rises tho, so it;ll heat from the top down regardless. Is there a square cover on the tank about a third of the way up? The heater is behind that.

element is near the bottom already is it not?

it's the same one, just upside down I think

we don't seem to do long radius bend round these parts.

I think the sill is just a locally sourced/ folded extra?

looks very like ours which is an Exitex

you won't find one of those in a heating pump...

I can't see how it's possible to spec or quote a system *without* having done the calculations tbh.

yes, I think a separate entrance is even required in some cases? useful info here:New Sites Fibre Handbook May 2022-1.pdf