Nanovela Residential RO Membrane have two Series TW(tap water) Working TDS from 500~2000ppm,salt rejection 98%,recovery 25% BW(brackish water)----High TSD Working TDS from 2000~4000ppm,salt rejection 97% recovery 20% our RO membrane have more stable performance and longer life under high TDS feed water We have M.A.T.P(massive adaptive testing platform) Except 100% vacuum test,we also do random water test to make sure RO membrane good quality We are a Chinese RO membrane manufacturer expert!