You may also want to buy a stainless steel bracket so this can be mounted to a wall

allowing one tank to top off before the next receives water

That excellent rejection rate means longer DI life

but additional storage solution and calibration buffers will be necessary in the future (exactly when depends on individual usage and needs)

Extreme TPack

50 GPD Filmtec Membrane Add Fast Flush Option ::Add Fast Flush 550cc Restrictor You may also want toFilmtec Membrane 50 GPD The FilmTec 50 gpd membrane TW30 1812 50HR fits most all RO systems. It is a TFC thin film composite membrane with a 99% rejection rate. This membrane is intended to be used with a 550 fast flush flow restrictor. Standard Features The FilmTec 50 GPD membrane TW30 1812 50HR fits most all RO systems. It was the one everyone had to copy so you are hard pressed to find a housing it will not fit. It is a TFC thin film composite