Reverse Osmosis system for my shop?

[Wish-I-Were-Fishn]

I'm wanting to install a reverse osmosis system for my CNC machine. The machine takes an initial fill of about 40 gallons and then requires topping off about 2-3 times per week of about 10 gallons per time.

I'm assuming I need a holding tank, but other then that I know absolutely nothing about them. Any recommendations?

I posted this in home improvement also. Thanks.

[PurpleFloyd]

I have gotten all of my RO equipment from AirWaterice dot com. You can get a pressure tank to hold the rest of the water or just use a storage tank and pump the water to it. At some point you will need to have a shutoff valve to shut the RO off when the storage tank is full and depending on the volume of water you need and the water pressure you have you may want to look into a booster pump. They increase the water pressure as the water goes through the membrane and they make it more efficient.