I will be purchasing a Fleck 5600SXT 48,000 grain capacity water softener. However, before I order, I've got a few questions:

1)What place do you guys think is the best place to order from? I've been recommended qualitywatertreatment.com, ohiopurewater.com, and qualitywaterforless.com. They're all within the same amount of money, and they all seem to be pretty good.

2)I can use this for a bypass valve, there is no need for another one, correct? http://i.imgur.com/9vhiQnZ.jpg

3)This drain is ok for the drain and overflow lines, right? http://i.imgur.com/CSXWX3b.jpg

4)Since my valves are not threaded, and I donít know how to solder, I can just use sharkbite fittings, right?

5)Is it very difficult to assemble and install the water softener?

6)Iíd appreciate any tips you may have (what materials the lines should be made out of, precautions to take, stuff like that)!

Thank you guys SO much!