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Defender Support
Membrane Removal & Replacement
Replacing membranes in the pressure vessels is an easy process if you have the proper information and tools at hand. Please refer to the following instructions when removing and replacing membrane elements.
WARNING: ALL PRESSURE GAUGES MUST READ ZERO BEFORE PROCEEDING. BEFORE ATTEMPTING, DISCONNECT THE POWER FROM THE SYSTEM AND BLEED ALL WATER PRESSURE FROM THE SYSTEM!
1
Remove the end caps from the top of the membrane housings
2
Remove the membrane bag containing the membrane element from the shipping box
WEAR GLOVES FOR THE FOLLOWING STEPS IN ORDER TO NOT CONTAMINATE THE MEMBRANE.
3
Cut the bag open as close as possible to the seal at the end of the bag so the bag may be reused if necessary
4
Make sure that all parts are clean and free from dirt
Examine the brine seal and permeate tube for nicks or cuts. Replace the O-rings or brine seal if damaged.
Flow directions should be observed for installation of each element into each housing.
As time progresses, the efficiency of the membrane will be reduced. In general, the salt rejection does not change significantly until two or three years after installation when operated on properly pretreated feed water. The permeate flow rate will begin to decline slightly after one year of operation but can be extended with diligent flushing and cleaning of the system. A high pH and / or precipitation of hardness can cause premature loss in rejection.