Pumps to boost pressure for combi boiler flat?

[Dai Thomas]

Hi, I live in a 4th floor flat, with 2 recently refurbished showers and a combi boiler. The pressure in the showers was poor, so after getting some reassurances that a gravity fed pump was still ok for my flat, I had a gravity fed salamander pump installed, but after a few weeks of it working, its now leaking. Does anyone have experience of the Salamander Homeboost or the Showerpowerbooster or others (both of which are apparently specifically for combi boilers.) Do they increase pressure well? Are they noisy? Thanks v much.

 

[Riley]

Home boost does a job but you’ll only get a maximum of 12lpm. Sounds like your installer hasn’t done there home work as a combi is never going to run two showers simultaneously

 

[Rob Foster]

This subject comes up often. Inexperienced or lazy heating engineers will fit combis anywhere and everywhere because the cannot fit anything else or are not qualified to fit the appropriate system for a buildings real needs. BUT more crucially the building owners usually want 'value for money' brutally translated into cheap.
Then they get what they pay for.
Rob Foster aka centralheatking

 

[Brambles]

With respect, on the fourth floor, you need a system that is properly designed.

The Combi issue is not beyond resolution, but it is not ideal.

In my view, if you want to keep the Combi, you will probably need a properly configured pumped accumulator.

Sadly there is unlikely to be a cheap fix for your problem