How to Clean Cat Water Fountain Pump | Step-by-Step

Clean a cat water fountain pump by unplugging the fountain, disassembling the pump, and washing every part with warm water and a small brush.

For the full breakdown, see our best Cat Water Fountain Easy To Clean guide.

A dirty pump is the most common reason a cat water fountain stops flowing or gets loud. Most pumps pull apart into a few simple pieces — an impeller, a cover, and a housing — and cleaning takes about five minutes once you’ve done it a few times. Knowing how to clean cat water fountain pump parts properly keeps the water moving and limits slimy biofilm buildup between full fountain scrubs.

What You Need Before You Start

Gather everything before you touch the fountain so you aren’t hunting mid-task with wet hands.

• Small brush — a bottle brush, old toothbrush, or cotton swab works
• White vinegar for hard-water buildup
• Warm water (never boiling — heat warps plastic parts)
• A towel to protect your countertop

You do not need soap. Dish soap leaves a film that can irritate a cat’s stomach, so the manufacturer instructions for most fountains recommend warm water and mechanical scrubbing instead. If you do use a drop of mild soap on extra-greasy parts, you must rinse every piece for a full minute to remove all residue.

How to Clean Cat Water Fountain Pump: Step-by-Step

The basic disassembly order stays the same across most fountain brands — PetSafe, Drinkwell, and others. Your specific model’s manual may differ slightly, but these steps cover the works.

1. Unplug the fountain. Never clean a pump that’s still connected to power. Remove the pump from the fountain basin and take out any tubing attached to it.
2. Pull apart the pump. Most have a removable front cover and an impeller that sits underneath. Twist or lift the cover per your manual — some pull straight off, others twist a quarter-turn.
3. Scrub every part. Run warm water over the housing, cover, and impeller while brushing off slime and debris. Pay special attention to the impeller chamber, where hair and grit collect fastest.
4. Clear the intake. The small holes at the bottom of the pump pull in water — poke out any lint or fur with a cotton swab or toothpick.
5. Rinse everything. A thorough rinse matters more than the washing. Run each part under warm water until no debris or residue remains.
6. Reassemble and test. Snap the cover back over the impeller, reconnect tubing, place the pump in the fountain, fill with fresh water, and plug back in. You should hear a quiet hum, not a rattle — a rattling pump usually means the impeller is seated wrong.

For your fountain’s exact disassembly, PetSafe’s official fountain care instructions show the specific pump-teardown sequence for their models.

Removing Hard-Water Buildup That Won’t Scrub Off

White, crusty deposits mean calcium and minerals have built up. Scraping them off risks scratching the parts — soak instead.

Mix equal parts white vinegar and warm water in a small bowl. Submerge the pump parts for 15 minutes, then scrub with your brush. The vinegar dissolves the minerals, so the buildup wipes off clean. Rinse all parts thoroughly in warm water before reassembling. Never use concentrated acid cleaners, and don’t reach for boiling water — both can warp or crack the plastic pump components.

How Often Should You Clean the Pump?

If your fountain’s pump is worn beyond saving, you’ll also want to know which replacement part fits your model before buying.

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