I did mine by myself two years ago. Cannot remember the details.
我的Builder给留的是铜管。去home depot, or Rona卖一个像螺丝母似的的东西(two pieces, 像螺丝母似的的东西 + very soft metal),直接把铜管拧在冰箱的接口上就成了。也可以买一管防漏水的“Grease", 抹上。
If it is a plastic tube, my method may not work for you because it only works on copper tubes.
Talk to the sales at Rona or Homedepot,and I believe they can give you a good help definitely.
OK. I put a question here. Does anybody know where we can buy the water filter for a Fridge?