Can I hook my RO/DI up to my outside hose? (more questions for you all!!)

[OCDP]

Ahh okay, sweet thanks everyone. More questions now though ( just hooked it up)

Is it normal to hear a slight hissing sound coming from the unit? I hear a hiss and don't know if it's right or not.

I have a pressure gauge, but the hose that the pressure gauge is on doesn't fit the hose adapter .. this way I could dial into 65psi and have the correct pressure. Right now I have it turned half way.

Thanks again guys, sorry for all the questions... I've never seen or used one of these things before .

Scott