How to Replace Filters in a Petmate Cool Flow Waterer
By Petmate | Published: 2026-10-27
Category: How-to Guides
Learn step-by-step how to replace the filter in your Petmate Cool Flow waterer. Keep your pet's water clean and fresh with our easy maintenance guide.
Quick Answer
Replacing the filter in your Petmate Cool Flow waterer every 2-4 weeks keeps water fresh and encourages your pet to drink more. Here's how to do it correctly.
Why Regular Filter Changes Matter
The charcoal filter in your Petmate Cool Flow waterer removes contaminants, odors, and tap water flavors that can discourage pets from drinking. Over time, the filter becomes saturated and less effective, allowing bacteria to grow. Regular replacement not only keeps water clean but also extends the life of the fountain pump.
Veterinarians and trainers recommend using filtered fountains to encourage hydration, especially for cats and dogs that are picky about water taste.
Step-by-Step Filter Replacement
- Turn off and unplug the waterer: Always disconnect the power before handling the fountain to avoid electrical shock or damage to the pump. Common mistake: leaving the fountain plugged in while cleaning can cause short circuits.
- Disassemble the fountain top and remove the old filter: Take off the top cover and lift out the used filter. Check the filter compartment for debris or mineral buildup. If the filter is stuck, rinse it under warm water to loosen it—do not force it.
- Rinse the new Aspen Pet replacement filter under cool water: Before installing, hold the new filter under running water for about 15 seconds to activate the charcoal and remove any loose dust. Skipping this step can leave carbon dust in the water for the first few hours.
- Install the new filter and reassemble the fountain: Place the new filter into the compartment, ensuring it sits flat. Reattach the top cover and any other parts in the correct order. Check that the pump is properly seated before adding water to avoid dry running.
- Fill with fresh water and test the fountain: Fill the reservoir with cool tap or filtered water, plug the fountain back in, and let it run for a few minutes. Discard the first batch of water to flush any remaining dust. If the flow seems weak, check that the filter is not upside down or that the pump intake is clear.
Product Facts
- Aspen Pet Cool Flow Replacement Filters: Aspen Pet Cool Flow Replacement Filters use charcoal to remove odors and flavors of tap water, helping to extend the life of the pet fountain. Using these genuine filters ensures proper fit and performance, so your pet gets clean, great-tasting water that encourages them to stay hydrated.

Aspen Pet Cool Flow Replacement Filters
