Three filtration + post activated carbon + mineralized filter Technical specification: Water inlet fittings including 1/2"x1/2"x1/4" water inlet tee and 1/4" ball valve, water outlet fittings including different types of goose type faucets. When undersink system use underwater or unidentified water quality, please contact us. Inlet pressure: 15-125psi/1-8.6kg/cm2 Max waterflow: 1.0GPM Max temperature: 45°