A:Answer Hi there, thank you for taking the time to reach out. This icemaker uses your refrigerator's water supply, which may or may not have an internal filter. If your refrigerator does not have a filter, we recommend some kind of filtration system as unfiltered sand or particles can interfere with the ice maker's operation. More information is available on page 18 of the manual, linked here: https://files.bbystatic.com/VNAF97j448v%2BWxQeajDX0A%3D%3D/1b2c43b8-cb96-4db8-ae12-b8524fa1f28c.pdf - We hope this helps, and please feel free to let us know if there are any ways we can assist you in the future. -Elliot@GEA