USWater has many filters and membranes that fit Culligan reverse osmosis systems at prices far below what you could expect to pay from a Culligan dealer.  The older style Culligan RO system is on the left and the newer Culligan RO system is on the right.  If you are unsure which filter you need, you can e-mail us at info@uswatersystems.com or call one of our water specialists at 800-608-USWATER.