Model Number: YB-4040 Brand Name: FRP Key Specifications/Special Features: Name: 4040 FRP ro membrane housingAccommodates standard make 4" membrane elementOperating temperature range: -10°C - 49°CFeed/concentrate port 1/2" or 3/4" thread, permeate port 1/2" threadTest pressureStandard: 1.5x design pressureASME: 1.1x design pressureOperating pH range: 3 - 11Cleaning pH range: 2 - 12 (less than 30 minutes) Model Design pressure RO model Element FRPMV4040E-300-(1-6)W 300PSI 4040 1-6 FRPMV4040E-450-(1-6)W 450PSI 4040 1-6 FRPMV4040E-600-(1-6)W 600PSI 4040 1-6 FRPMV4040E-800-(1-6)W 800PSI 4040 1-6 FRPMV4040E-1000-(1-6)W 1000PSI 4040 1-6 FRPMV40S (side entry design)