my cold water faucet was threaded into the bottom of the handle. I unscrewed the cold pipe from there, and put in the T that came with my filterdirect ebay filter. This T just moved the pipe down by 2 inches or so, and then the icemaker type plastic hose attached into the T.. There is a nice valve on the T too, which is good, since sometimes I have to flush my house water lines with chlorine.
If you have hard pipe going up to your cold faucet, you may want to pick up a flex pipe from your hardware store.. it will work the same way, but be easier to deal with the extra 2" in length you'll get from the T.
I'm fairly handy, but not a plumber.. .it took me 2 hours or so
54g all-glass bowfront corner planted FW
Red tiger lilly, Rotala Indica, Sagittaria Subulata, Micro Sword, Cardinal Plant
Fluorite Black sand and gravel