Specification: FEED WATER PRESSURE:40 – 100 PSI TEMPERATE:40-110°F/5-45°C PH:3.0 -11.0 MAX. TDS :1000 PPM TURBIDITY < 1.0 NTU MAX SDI <4.0 HARDNESS < 5 GPG IRON <0.1 MANGANSESE <0.05 Shelf life: 3 Years Features: BPA free,Food grade materials,Quick change filters EASY&CONVENIENT- The Best Simplest Installation Reverse Osmosis Drinking Water Filtration System,Quick change sanitary filters, change filters in seconds, shut off water automatically, and No tools required.,others is same as traditional reverse osmosis system. HIGH QUALITY– All tube, fittings, storage tank,Ro membrane complies with NSF/ANSI standard 58 to provide healthy, safe, and pure water, NSF certificated LEAD FREE deluxe kitchen sink faucet as last pure water guarantee in your home HIGH EFFICIENT FILTRATION-5-Stage Reverse Osmosis Drinking Water Filtration System with NSF certificated Thin-film composite RO membrane filters down to 0.0001 micron,Reduce 99% contaminant ,including Heavy Metal, Arsenic, Lead ,Mercury ,Fluoride, Hardness,Cadmium,Chlorine,Taste,Odor,Asbestos, Hydrocarbons,Cyanide,Trivalent chromium and more 1000+ contaminants RESPONSABLE MANUFACTURER- ISO9001:2008 certificated Manufacturer ,also Member of Water Quality Association (WQA) Warranty-1year limited Product quality and service guarantee,NOTE:PLEASE TURN OFF THE BLUE FLUSH VALVE WHEN YOU FLUSH IT 30 MINUTES BEFORE YOU USE IT. IF YOU DON'T KNOW WHICH VALVE,PLEASE CONTACT WITH US. More valuable information: 1.What is advantage compare to traditional Ro system? Answer: It equip with quick change sanitary filters and NO TOOLS REQUIRED, just change filters in seconds,even by woman or kids,and other parts is 100%same as traditional Ro system. 2.What is 5stage filters and function?Is it more expensive than normal one? Answer: the 1st stage is PP spun filter, Remove sand, dirt, sediment. life time:6-12months. the 2nd stage is Granular Activited Carbon Filter, Remove chlorine, taste & odors, very fine particulates. life time:6-12months. the 3rd stage is Carbon Block Filter, Further remove chlorine, taste & odors, very fine particulates. life time:6-12months. the 4th stage is TFC Ro Membrane, Reduce 99% total dissolved minerals, heavy metal, Arsenic, Mercury, Iron, lead ,Fluoride and 1000+ contaminants . life time:15-24months. the 5th stage is Post Inline Acid Washed Coconut Carbon filter, Polish water for refined taste. life time: 12months. life time depends on usage amount and feed water quality. 3.Where can I buy the replacement filters ? Answer: In geekpure store on ebay. Note: 1.Please turn off the blue flush valve (ITEM 6)when you flush the system 30 minutes. 2.It Is Normal For Some Black Carbon Fines To Appear In The Water When Emptying The First 2 Tanks Of Water. The First 2 Tanks Of Water Produced Should Be Emptied And Not Used. 3.Push the Tubing All the Way in and Use Teflon Tape During Installation.