There is a smaller and a bigger sized O-ring on the end connectors. The side of
the end connector which will fit on end of R.O. element has a lip on the inside.
This side of end connector has the bigger O-ring. The interconnector 0-rings
are the same size as the bigger end connector O-rings.
(2) Install O-rings (1) and (3) in end connectors (2) and interconnector (5).
End Connect O-ring (1.680 In. O.D.)
End Cap O-ring (6.00 In. O.D.)
2. End Connector
3. Interconnector O-ring (1.756 In O.D.)
4. R.O. Element
N u t
5. Membrane Interconnector
Figure 3-5. R.O. Vessel (Exploded View)
Some R.O. elements are packaged in sealed plastic bags with the protective
chemical formaldehyde, which is poisonous; avoid fumes and keep away from
eyes and mouth. Handle with extreme care. After handling, wash hands
thoroughly with soap and water.