There is a topic mentioning this subject on the Octopus Energy forum. The view seems to be that it works. There are also suggestions for DIY solutions that are beyond my comprehension.
In case you or any other reader has access to that forum, here is a link:
The forum is also open to customers on other smart tariffs, so Go, Go Faster, TEG, and Tracker. Maybe more. If any of those apply to you then you can join the forum but you need to ask to join, it isn’t automatic. Email “Smart” to request membership.
That’s really interesting, surely these must be possible to buy for self install?
Edit: Yes, knew I would show myself up by not just googling first. About ÂŁ45 plus read some good writeup of experience with them on Screwfix forum.
If it does what it says (and I can’t see why it wouldn’t) then seems like they should be mandatory fit. Only disadvantage I can see is that the hot tap will probably trickle once opened which could perhaps bit a bit confusing/annoying to anyone not familiar with it - especially for those tap/sink combos which are designed to give you an embarrassing wet lap if opened fractionally too much.
Have you actually found anywhere that has them in stock?
I have tried several places (including screwfix) and whn you actually try to buy them it says they are out of stock. I was seriously wondering if they had stopped being manufactured