172. Wet the o-rings on both end capsof the prefilter.3. Insert the upper end cap into uppercenter position until it bottoms outin the connector. (The upper endcap is the one with the right angleturn and the two flanges.) The twoflanges on the end cap slide downon each side of the keyway wall.(See Figure 7.)4. Lower the prefilter and insert thelower end cap into the lower centersocket until it is firmly seated.Membrane Installation1. Remove the membrane bypasstubing from the EASYpure RO (seeFigure 5). The membrane bypasstubing may be stored inside theEASYpure RO case for easyaccess when needed for the sys-tem sanitization procedure.I NSTALLATIONFigure 5 Membrane Bypass Tubing InstalledMembrane By-Pass TubingNoteThe membrane by-pass tubing willbe needed for sanitizing theEASYpure RO. Do not discard it.