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Shower Pump to Boost Pressure with Combi Boiler and Cold Water Storage Tank Possible?

Postby deman1q » Tue Mar 17, 2015 7:32 pm

Hello there dear plumbers!
Is it possible to get better pressure in the shower with the system that has a combi boiler and cold water storage tank in the ceiling above?
The current pressure is low enough to hold it back with the finger. Also, hot side seems to be have a lot more pressure and it also makes the shower temperature adjustment a weird task to do.
Normally shower pump is installed on the system that has a hot water cylinder and cold water storage tank overhead. I have seen the system in the combination with cold water tank in the loft, hot water cylinder or storage tank on the same floor as the shower with the pump and boiler on the floor below the shower. How did it all work? Your input is appreciated. Thank in advance. Please review the current layout picture and second picture of assumed system that may work or may not? Thanks again!
no pump.jpg
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Simply Build It

Postby proptech » Wed Mar 18, 2015 10:55 am

Hi deman1q

Are you sure the system is piped up as on the diagram ? A combi boiler would be supplied by the mains, and not from a tank.
I'm afraid your second diagram is also a complete no-no.
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