Drinkwell Foam Pre-Filters - Replacement (2 Pack)

This Drinkwell fountain foam pre-filter should be replaced, on the average, every 4 to 8 weeks. This depends on the fountain's location as well as the number of pets using it.
These pre-filters trap items like hair or any debris that may be in the water and would otherwise reach the fountain's pump.
These filters not only help to keep the pump clean, but also assist in providing your pet the cleanest water possible and maintaining the water's flow rate.