roy is yours boostered to make 1000l in 3 hours i would imagine it is as 5.5 l a min is unusal for mains pressure , exceptanional.
and i do sell cut of seperate , it consists of float switch and solenoid and eco flow regulator it has to be set up correctly before r/o to cut of the r/o so depends if r/o are on board or not 01435 873555 0744 227635