Not instantly in my experience.A thermostatic mixer should just drop the flow surely?
Not instantly in my experience.A thermostatic mixer should just drop the flow surely?

Not actually fitted myself but have seen them in action in two of my clients properties and they were well pleased. Plus it's an easy DIY fitHave you used them?
The hot water cylinder sits to left hand side of these pipe on the shelf you see in the picture.Is this above your hot water cylinder? Take a pic of the hot pipework from the cylinder.
Take it the shower feed is mains cold?

no my cylinder is abut 2 foot off the ground on the self in the first picture.Cylinder is on the ground floor I take it? If so I would suggest the least intrusive method would be to take a tee off your hot and cold pipes and mount a pumped single outlet digital mixer shower at the foot of cylinder/below it. It'll need a power supply to the airing cupboard unit, you get wireless control units for the bathroom though.
This could utilise your existing shower pipe.

Yes I just meant in a ground floor cupboard, as in you have another floor above before the loft tank?no my cylinder is abut 2 foot off the ground on the self in the first picture.
You could but it's probably not necessary, your setup is ideal you can have a significant vertical drop from your hot takeoff to the pump which minimises air getting drawn in. If your tank is 2 floors below the loft as well you don't need a universal pump (with a tank), just a normal positive head pumpthe hot/cold pipes in the first picture i was planning to cut and install/connect pump on the ground below the cylinder .
would you recommend an S Flange to the top of cylinder?

It's a bungalow and loft tank to top of cylinder is about 3/4 foot.Yes I just meant in a ground floor cupboard, as in you have another floor above before the loft tank?
You could but it's probably not necessary, your setup is ideal you can have a significant vertical drop from your hot takeoff to the pump which minimises air getting drawn in. If your tank is 2 floors below the loft as well you don't need a universal pump (with a tank), just a normal positive head pump

Gotcha, I saw floorboards above the cylinder and assumed that wasn't the loftIt's a bungalow and loft tank to top of cylinder is about 3/4 foot.
I did the test and 300ml in 6 secs so Stuart Turner said universal pump is required
so you still think I could go ahead without a flange due to the ditance between top of cylinder feed to the pump inlet?Gotcha, I saw floorboards above the cylinder and assumed that wasn't the loft

Yep definitely. Is your plan to use the existing shower feed pipe and just boost the shower?so you still think I could go ahead without a flange due to the ditance between top of cylinder feed to the pump inlet?
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local