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
Shelf life: 3Years
Warranty: 1 year limited warranty

More valuable information:
✪What is dimension of installed Geekpure RO4-100G(TK) system?
RO unit: Length 14.80 inch, Width 9.2 inch, Height 5.2 inch.

✪What is 4 stage filter and function?
the 1st stage: PP spun filter, Remove sand, dirt, sediment.
the 2nd stage:Carbon filter, Remove chlorine, taste & odors, very fine particulates.
the 3rd stage: Ro membrane, Removes up to 99% of contaminants including arsenic, chlorine, lead, fluoride, mercury, cadmium, odor, heavy metals, and 1000+ contaminants.
the 4th stage: Post coconut carbon filter, Polish water for refined taste.

✪ What is in the box?
1 RO unit, 1 storage tank, RO membrane, faucet, diverter valve, 1 pieces wrench, RO tubes, clips, drain clamp, teflon tape and so on.

✪BPA free?
Yes, BPA free, food grade materials.

Note:
1.It Is Recommended to Wait Until the Entire System Is Pressurized and Re-Check for Any Leaks Before Leaving Installation Site.
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.