Specification: FEED WATER PRESSURE: 40 – 60 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. Service life up to 10000 gallons or 3-6 months (it may vary in different feed water condition and frequency of use) FRQ Q:What is dimension of Shower Filter? A:Diameter:2.8 inch, Height 5.3 inch. inlet/outlet :1/2". 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 flush new filter. Please keep flush filters 15-20 minutes. 3.Push the Tubing All the Way in and Use Teflon Tape During Installation.