Undersink instantaneous water heaters

[denso13]

Thanks I think the electricians mentioned putting it on a fuse spur

It can't, it's too big for a 13A fuse.

 

[Fredstudio]

Thanks so would need it's own supply from the board Rcbo protected maybe

 

[denso13]

Yes, own supply, ideally with RCBO.

 

[Fredstudio]

There the units

 

[flameport]

There the units

This affair: https://www.amazon.co.uk/Instant-Electric-Water-Heater-Instantaneous/dp/B0DRCCHXPM

It's a direct from China import, so there will be no complaining or warranty when it goes wrong.
Doubtful it complies with any UK requirements for electrical or plumbing.

It claims to be supplied with a UK plug but this is useless, as the 3500W rating is too high for that.
3500W at the stated 220V is 16 amps, far more than the 13A maximum for a UK plug.
When used in the UK on a more likely ~240V supply, that will become 17.4 amps and about 4200W.

If you insist on having it installed - good luck, you'll need it. As will anyone else unfortunate enough to use it.

 

[Fredstudio]

Someone got them me to install, if they don't comply with regs etc I'll get them to get something else.

 

[Fredstudio]

Is there anything similar that is UK approved. Maybe the Hyco rho one or similar