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OK, thanks So what exactly is the upshot of All thermostats are adjusted in the factory at a flow pressure of 3 bar on both sides Does it have to re-calibrated?

Could someone kindly translate the following please Max. pressure differential 5:1 = does this mean it can work on an unbalanced system providing the ratio isn't more than 5:1? All thermostats are adjusted in the factory at a flow pressure of 3 bar on both sides. = does this then mean it...

As you said the pressure wouldn't be very good.

The plumber i had round is adamant it won't work and won't fit it. Grohe say it will, as long as the pressure of one isn't 5x more powerful than the other. The shop I got it from say it won't, someone tried to fit one to an un-balanced system and it didn't work. It seems the only way I can...

Brilliant, now I'll just have to convince the plumber I'll work. Think he's just trying to cover himself should it not work. Must have had four plumbers look at it so far and had for different answers. :)

^bump^

Without the pump it wouldn't work. Is that right? As it stands I couldn't use the mixer shower with two different water pressures/sources?

These apartments were built in the 60's. CW storage supplies all of the apartments in the block, we're on the ground floor. When we moved in we had central heating installed, that's the way they did it. You're right in what you say, i need to link the cold feed from the mains to the...

I'm trying to install a Grohe 1000 Thermostatic mixer shower. Now the dilemma I have is that the hot water in the bathroom comes from the Combi boiler (Bosch) via the mains whilst the cold feed from the storage tank on the roof, a good 30-35' in height. Will the shower struggle to offer a...