This 3-stage reverse osmosis unit is ideal for fresh water applications, drinking and more. Comes with 1-micron sediment filtration, a carbon block for VOC reduction and a TFC membrane. Also includes quick connect fittings, a shut-off valve, a filter wrench for easy cartridge replacement, and hose bib feed adaptor. 3-year limited warranty. Made in the USA. • High efficiency 1-micron sediment pre-filter • High capacity chlorine guzzler carbon block pre-filter • High flow/high rejection TFC membrane (the best on the market!) • 160 PSI pressure gauge marked with operating and unsafe ranges • Solid aluminum mounting bracket • Clear 10" filter cartridge housings A minimum of 40psi is required to properly operate the system.