Ro Unit Setup

[heavenly_d3vi1]

I need a little bit of help setting up my RO unit.. well not the unit, but all the extra in-line things! I've got a 4 stage Osmotics unit..

http/a6.sphotos.ak.fbcdn.net/hphotos-ak-ash4/196464_10150142835956875_577436874_6801441_1371384_n.jpg

Now.. all of the following I was told I needed to get to go with it, but I'm unsure where to plumb them in, so if someone could explain in very simple terms where each goes i'd be very grateful!

dual tds meter
2 x pressure gauges
2 x ball valves

 

[heavenly_d3vi1]

Anybody??