1- PureCool works perfectly with any standard ceramic water crock.

2-PureCool fits these coolers just as it is: Any cooler with the opening above the reservoir of 4 5/8 - 6-1/4" Oasis, Crystal Mtn, Whirlpool, Water-Boy, Sunroc, Greenway, Sunbeam, most Brita coolers, and older models of GE and Elkay coolers.

3- Coolers that require our adapter ring: Any cooler with the opening above the reservoir larger than 6-1/4" Older models of Oasis and Whirlpool, new GE Profile. Adapter ring works with openings up to 7 1/8" wide.

4- Make sure the opening above the reservoir of your water cooler is at least 4 5/8" wide. The PureCool is 4 1/2" at the bottom. (We just found a customer with an older Avanti cooler with a reservoir only 4" wide.)

Please measure the opening of your cooler before ordering. If you need the adapter ring, ask for one on your first order. Reuse for years. You will be given the chance to order the ring during your order processing. Under "Options" Click "Yes."