How to replace reverse osmosis filter – changing Whirlpool WHER25 cartridges RO membrane


Documenting how i replaced cartridge filters for my RO filtration system.
WHEERF Filter on Amazon: http://amzn.to/1QxdD5t
WHEERM Filter on Amazon: http://amzn.to/1MXiU41

TDS Meter from Amazon: http://goo.gl/i5qge
Wiki TDS: http://en.wikipedia.org/wiki/Total_dissolved_solids
Owner manual: 
http://www.ecodynewatertreatment.com/undersink-filters/view/wher25/
http://www.manualslib.com/manual/266980/Whirlpool-Wher25.html