300 litre Cistern has 15mm pipe to supply power shower .

[Wargas]

It's not a power shower op it's an electric shower and can't be fed off tank as they require a min of 0.8 bar of pressure

Yes you right it is electric shower

 

[stani]

Well all that effort, it's an 8.5kw shower run off cold water tank, minimum you need 0.7-1.0 bar pressure with minimum 8 litre/minute flow rate, unless you can provide the pressure they won't work.

 

[stani]

Possibly an accumulator, but there are others more commercially inclined who will give better advice.

 

[Wargas]

Thank you all .

I'll update all about the progress.

 

[Scott_1979]

There are electric showers with an integral pump built inside which are gravity fed and need only 8cm of head. I've installed these in b and b's due to mains being starved. Might be looking into and might be an easier fix for you. Noisy beggars though! The ones I've used are made by triton

 

[stani]

Scott are they not hot and cold fed

 

[Scott_1979]

It's a gravity fed electric shower it only requires a cold feed

 

[cr0ft]

I've also fitted a pumped electric shower before. The pump and 8.5KW heater are both inside the unit. Worked a treat in a similar situation but yes, very noisy indeed!

 

[deg]

Mira elite 2 is one example of a cistern fed electric shower. Noisey buggers indeed.