Max.design pressure rating:300psi,450psi,600psi,1000psi,1200psi Mode:8040-1W,8040-2W,8040-3W,8040-4W,8040-5W,8040-6W,8040-7W,8040-8W Accommodates standard make 8"Membrane Element Operating Temp Range:-10°C-49°C Feed / Concentrate port 1 1/2"coupling,Permeate port 1"female Operating Temp.Range:-10°C-49°C Operating pH Range:3-11 Cleaning pH Range:2-12(less than 30 minutes) Test pressure 100%QA test with 1.5x design hydraulic pressure ASME:1.1x Design Pressure