Gravity system which is pump assisted
This type of system is very common and technically it is a high pressure system so it will work with most bathroom and kitchen taps and also most showers.
The benifits of this type of system is that because you are storing your hot water you can decide what pressure and flow you want by simply choosing the correct pump for the job.
This is a good solution if you have a standard gravity fed water system and have bought high pressure taps or showers from a supplier which have already been fitted and you want a simple remedy. If you want more information on fitting a pump to boost gravity water systems click here.