Short answer
How often should you clean a pet water fountain?
Take it apart and clean the reservoir, bowl and pump about every 1–2 weeks, with a full water change — more often with several pets. Most makers say to replace the filter every 2–4 weeks to monthly: PetSafe says every 2–4 weeks for one model, Catit every 30 days. Top it up daily, and dump the water whenever you see hair or food in it.
Typical intervalClean every 1–2 weeks · filter every 2–4 weeks
Every day: top it up and check the water
Top up daily, and if you see hair, food or cloudy water, empty it and start fresh. The filter catches a lot, but the spout and bowl still pick up saliva, hair and crumbs. The CDC’s pet-supply cleaning schedule says to clean water bowls every day, and Catit’s cleaning guide for its small PIXI Mini fountain has you empty the fountain and wipe out the reservoir every 3 days.
A big reservoir that lasts several days between top-ups still needs emptying and cleaning on schedule.
How often to replace the filter
Most makers say every 2–4 weeks to monthly — check the manual for your model. Here’s how a few of them put it:
| Fountain | How often to clean | How often to replace the filter |
|---|---|---|
| PetSafe Drinkwell Platinum | Whenever you replace the filter | Every 2–4 weeks |
| PetSafe Drinkwell Stainless Multi-Pet | Monthly with one pet; at least every 2 weeks with several | Usually every other cleaning, more often with several pets |
| Catit Flower Fountain | See the manual | Every 30 days, or when visibly saturated |
| Catit PIXI Mini | Quick clean every 3 days; pump weekly | Monthly, or sooner if dirty, damaged or clogged |
- More pets, shorter interval: PetSafe notes that multi-pet homes need to clean more often and change filters more often.
- Other brands: filter designs and schedules vary, so go by your own manual. Some smart fountains send an app reminder when the filter is due.
How to clean it: don’t skip the pump
Take the pump apart every time you clean — hair wrapped around the impeller is what slows the flow.
- Unplug the fountain and pour out the old water.
- Reservoir, lid and bowl: wash with a soft cloth or sponge and a mild detergent, then rinse until no suds are left. The CDC’s method for bowls is soap or detergent and warm water, scrub, rinse and dry. PetSafe says the bowl of its stainless fountain is dishwasher-safe when it isn’t heavily soiled; check whether yours is.
- Pump: remove the cover and impeller, brush out hair and gunk with a small brush, and rinse everything. For mineral buildup, PetSafe soaks the parts in a 50/50 mix of white vinegar and water for 20 minutes before scrubbing.
- Filter: rinse with plain water only — no soap, as both PetSafe and Catit point out. Rinse a new filter before use too: PetSafe says 30 seconds under warm water, and Catit says to rinse off the dust and soak it in water for 10 minutes.
- Reassemble and fill to the fill line before switching it back on.
If the reservoir or bowl feels slimy, you’re already due for a clean.
Cats with kidney disease or older cats
If your cat has kidney disease or gets subcutaneous fluids at home, follow your vet’s instructions for water and care. A fountain drains so gradually that it’s hard to tell how much your cat drank today. Scooping the litter box is a better daily check: if the number or size of urine clumps changes noticeably, note it and ask your vet.
Common mistakes
- Topping up without ever emptying: the old water stays at the bottom, and fresh water only dilutes it.
- Washing the filter with soap: PetSafe and Catit both say plain water only.
- New filter, dirty pump: a fresh filter can’t help if the impeller is wrapped in hair.
- Letting the water run low: keep it at or above the fill line the manual shows so the pump doesn’t run dry.
- Putting it right next to the food bowl: International Cat Care notes that cats prefer not to drink next to their food and suggests several water stations around the home. It also says some cats like moving water, and that a fountain should be introduced gradually.
How to remember
Topping up fits right after feeding and soon becomes automatic. What actually slips is the take-apart clean and filter change every week or two: often enough to feel minor, far enough apart to forget. When was this filter put in? And when two people share the topping up, it’s easy for each to think the other did the clean.
Track “clean fountain + new filter” as a recurring item and set How Often to match your manual; if you only cleaned it this time and the filter isn’t due, say so in the note. The water filter jug in your kitchen works the same way — you can’t see it getting worse, so it goes by the calendar. If you keep fish, aquarium water changes run on a similar weekly-or-two rhythm.
Keep track of it with Againday
Topping up is easy to remember. Taking the pump apart and swapping the filter every week or two is what slips — and when two people share the topping up, each assumes the other one cleaned it.
- Add a new item called “Clean fountain + new filter” and set How Often to “Every 2 weeks”.
- Give it the tag “Pets” so you can filter it with related items.
- Set its reminder time to 8:00 PM. You’ll get one notification on the day it’s due.
- Put it in a shared list such as “Home”. Whoever does it marks it done, and everyone sees who did it.
- When it’s done, tap the cycle ring to mark it done. Forgot to log it? Add a past date from the item’s page.
- Add a note to each entry, for example: “Lots of hair in the impeller; changed the filter this time”.
Againday is free for 3 items, with shared lists, widgets and reminders included. Againday Pro is one purchase, not a subscription.
Frequently asked questions
- How often should you change the water in a pet fountain?
- Top it up every day and empty it completely at least once a week — more often if you can. Catit’s cleaning guide for one of its small fountains has you empty it and wipe out residue every 3 days, and the CDC recommends washing ordinary water bowls daily. If you see hair, food or cloudy water, change it right away.
- How often should you clean a cat water fountain pump?
- Every time you clean the fountain. Catit’s PIXI Mini guide calls for cleaning the pump weekly, and PetSafe’s cleaning steps for its stainless multi-pet fountain include taking the pump apart at every clean — monthly with one pet, at least every 2 weeks with several. Hair wrapped around the impeller is the usual reason the flow gets weak.
- Can you rinse and reuse a fountain filter?
- You can rinse it with plain water, but never use soap. PetSafe says its charcoal and foam filters can be rinsed and reused if they aren’t heavily soiled, and usually need replacing every other cleaning; Catit says to replace a filter early if it’s visibly dirty, damaged or clogged. Once you reach the replacement interval in your manual, put in a new one.
- Do filterless fountains still need cleaning?
- Yes. No filter to replace doesn’t mean nothing to clean — the reservoir, bowl and pump still collect saliva, hair and food bits and turn slimy. Follow the manual; if it doesn’t say, clean it on the same schedule as a regular fountain, every 1–2 weeks.
- How often should you clean a dog water bowl?
- Every day. The CDC recommends cleaning bowls used for water and dry food daily, and bowls used for wet food after every use. Wash with soap or detergent and warm water, scrub, and rinse; bowls labeled dishwasher-safe can go in the dishwasher.
Sources
Intervals vary by product, model and situation. When the manual or a professional says otherwise, follow them.
- How to Replace the Filter in My PetSafe® Drinkwell® Platinum Fountain — PetSafe Support
- How to Clean the PetSafe® Drinkwell® Stainless Multi-Pet Fountain — PetSafe Support
- Catit Flower Fountain Triple Action Filter Pad — Catit
- Catit PIXI Mini Fountain – Cleaning Guide — Catit
- About Cleaning and Disinfecting Pet Supplies — U.S. Centers for Disease Control and Prevention (CDC)
- How to encourage your cat to drink — International Cat Care (iCatCare)