... 8040 membrane, 4040 membrane waste water membrane CSM Commercial MembraneModelFlow Rate(GPD,m3/d)Salt RejectionDimensionsTest ... Standard RE8040-BE44011,500 (43.5)99.7%8.0"40"40" BW Standard RE8040-BN9,500 (36.0)99.7 ... %8.0"40"40" BW Standard RE8040-BN3008,000 (30.3)99.7 ... %8.0"40"40" BW Standard RE8040-BR5,500 (20.8)99.75 ...