<b>Operation Specification: </b><br> FEED WATER PRESSURE :35 - 100 PSI<br> TEMPERATE: 40 - 110°F/5-45°C<br> PH :3.0 -11.0<br> MAX TDS 1000 MG/L<br> TURBIDITY < 1.0 NTU<br> MAX SDI <4.0<br> HARDNESS < 5 GPG<br> IRON <0.1<br> Life time :3 years <br> Shelf life: 5 years in original sealed package.<br>