dpmiller

"tread lightly on the earth"

I do a bit with Haier -80 lab freezers and they're very good indeed.

with a duff expansion vessel, even 80c could be enough to blow something.

Oddly enough my experience with safety valves- autoclave sterilisers as well as other pressure vessels and boilers- is that the insurance engineer absolutely *must* see them lifted at every statutory inspection and will often remove and pump test them as well to verify the opening pressure. It's not unusual to find a valve stuck badly enough that more than the chamber's safe test pressure is required to break it free which is more than a small worry. Yes occasionally one will weep after this, but replacement is the cost of doing business... I routinely lift the valve of any unit I'm working on to confirm it's *not* stuck...

Do safety/ multi groups not normally have a gauge on? If none is fitted might it be worth the OP getting a gauge and screwing it onto the PRV?

Lewis deck?

depends is it 16A real and continuous, or chinese...

Befab, Hamilton Contracts, Fees, as a first try

/board. A few years ago mind...

when we were ordering ours, white EPS was £11.57 for a 50mm, vs £13.70 for graphite

floating or sunk?

pennies, as I recall

graphite EPS takes it to 0.031 or so

whilst/ as all the stats and cutouts look after the safety side of things, I'd personally be thinking more about the possibility of (say) a stuck contactor going unnnoticed and the immersion taking over tank heating duties unknown. I certainly wouldn't presume that an SSR was totally trustworthy... /but then I come from a place where accidentally leaving the Willis on was punishable by death

is the oil/fuel ratio correct? What colour is the sparkplug?