View Full Version : Adding a second membrane

07/31/2010, 01:47 PM
What are the pros and the cons to adding a second membrane parallel to the existing membrane? How about in series? Waste water from first mebrane feeding second membrane...


08/01/2010, 10:01 PM
The best setup is running dual membranes in series. Production goes up to about five to eight gallons per hour depend on water temp. Waste water drops from 4 to 1 down to about 1.5 to 1 or less depending on pressure. You do need at least 65 psi or higher for a dual membrane setup to work properly. We have found dual Filmtec 75 GPD membranes to work the best. There are no advantages to running two membranes in parallel.