The system that i have uses a separate pressure vessel ( this was fitted because the ball valves closes slowly and the pump ended up rapidly switching on an off.)
this is the spec on the pump that i have
The Par-Max automatic pressure pumps automatically begin to operate when a tap is opened. This is an efficient high-flow self priming pump serving 2-3 outlets at the same time. Self primes to 3 metres high, can run dry without damage. Delivers 11 litres/minute, pressure switch cuts in at 10psi and out at 25psi. ( note you can adjust this)
just had a quick look at a RO filter on line and this was running at 60 psi have you bought the ro unit already ?
So you may need a bigger booster pump, if you are looking for a mains powered one DAB pumps did a good unit here is a similar one form Northern tool.
www.northerntooluk.com/pumps/electric-surface-pumps/1000w-self-priming-booster-pump_695E.htmlCheck the carriage cost when comparing prices.
Hope this helps and does not muddy the water to much
