Need RO set up help...

[GreenSpottedPuffer]

So...I was just thinking...if I shut off the coldwater with the valve on the right there, that will shut off the cold water going to the faucet but its not going to shut off the cold water supply completely. So I would have to have the cold water turned off...well I have no idea where. I am in a condo and I assume I would have to have the building shut the water off for me?

I was just thinking too...I used my last RO unit for year with it attached to the faucet. Seems to me then that I should be able to tap into that grey line that goes up to the sink and still have enough pressure. That can't be less pressure than I had through the actual faucet right? Shouldn't it actually be more since there is less distance?

If I did tap into that line, what fittings would I use?

I have figure out the drain and its actually going to be quite simple and easy.