A cat water fountain encourages your cat to drink more — but only if the water is clean. A dirty fountain won’t attract any cat. In fact, a fountain with biofilm or limescale buildup is worse than a plain water bowl. This article covers exactly how to clean a cat water fountain, how often, and what you should absolutely avoid using.

Why use a cat water fountain?

Cats are naturally low drinkers. In the wild, they got most of their moisture from prey: a mouse or bird is 65–80% water. An indoor cat on dry kibble gets none of that hydration and must actively drink to compensate. The problem: most cats simply don’t drink enough from a regular still-water bowl.

Cats have an instinct to avoid stagnant water. In nature, still water was almost always contaminated or old — moving water was fresh and safe. A water fountain mimics exactly that movement: cats are naturally drawn to the flow and the soft sound of the pump. The result: they drink more often and in larger amounts. Curious about how much water a cat actually needs daily? Read: how much water does a cat need per day.

• Cats drink on average 70% more from a fountain than from a regular water bowl
• Filtered water: hair, dust, and limescale are continuously captured by the activated carbon filter
• Quiet pump: the D600A runs nearly silent — ideal for shy or anxious cats
• Always fresh: water stays in motion, significantly slowing bacterial growth
• Wireless: no power cord on the floor, place it anywhere in your home

The health benefits are real: more hydration protects the kidneys, reduces the risk of UTIs, and keeps the urinary tract healthy. Kidney and urinary problems are the most common chronic conditions in cats, especially from age 7 onward. A water fountain isn’t just an accessory — it’s an active investment in a longer, healthier life for your cat.

Why a clean water fountain matters so much

Water that sits still or circulates for days attracts bacteria. Within 24 hours, a thin layer of biofilm forms — that slimy coating you feel when you run a finger along the inside of the reservoir. Cats smell this even when you can’t see it. The result: they drink less, or stop using the fountain entirely.

Drinking less increases the risk of kidney disease, bladder infections, and urinary tract problems — the most common health issues in cats over 7. A clean fountain isn’t a luxury; it’s prevention.

A clean fountain also directly affects how attractive your cat finds the drinking station. Fresh, filtered water tastes different from water that’s been recycling for three days. Cats notice immediately and will start preferring a dripping tap or a puddle outside over their own fountain. Regular cleaning keeps the fountain appealing and your cat properly hydrated.

How often should you clean a cat water fountain?

There are three maintenance levels, each with a different frequency:

How to clean a cat water fountain: step by step

Here is the complete cleaning routine for the D600A fountain — applicable to most other models as well.

What should you never use to clean a cat fountain?

Many people make the mistake of using the same dish-cleaning products on their cat’s fountain. That approach doesn’t work here: residues stay trapped in the filter and pump, and your cat tastes them immediately.

Using white vinegar for descaling is absolutely fine — just make sure to rinse three times with clean water afterward. Vinegar residue tastes unpleasant to cats, even though it isn’t toxic.

When does the filter need replacing?

Filters are consumables. They trap hair, dust, and limescale, but eventually become saturated and stop filtering effectively. Signs that your filter needs changing:

• The filter has changed color (dark brown or grey)
• The water has a different smell or taste
• The pump’s water flow is noticeably weaker
• The filter is more than 4 weeks old (hard water: 2 weeks)

Replace the D600A filter every 2 to 4 weeks depending on water hardness in your area. In areas with hard tap water, 2 weeks is a sensible target. Want more detail on when and how to replace the filter? Read: cat water fountain filter replacement: when and how.

Our fountain: designed to be easy to clean

The D600A was built with maintenance in mind: the reservoir is wide enough to fit your hand inside, the pump disassembles without tools, and the filter swaps out in 10 seconds.

Frequently asked questions

Can you put the water fountain in the dishwasher?

The D600A reservoir can go on the top rack of the dishwasher. The pump and filter must never go in the dishwasher: the heat damages the seals and filter media. Always check the manual for your specific model.

How long does a filter last?

On average 2 to 4 weeks. Many areas have relatively hard water, which means filters get saturated faster. Watch for filter color (dark = saturated), flow rate (weaker than usual), and any odd smell. If multiple cats share the same fountain, replace it sooner.

My cat stopped drinking from the fountain — now what?

Nine times out of ten, it’s a cleaning issue. Clean the fountain thoroughly, replace the filter, and refill with fresh water. Cats are very sensitive to smell and taste and will stop drinking the moment they detect anything unusual. Also try moving the fountain to a different spot — some cats prefer not to drink right next to their food bowl.

How do I know if I’m not cleaning it enough?

Four signs: your cat is drinking less or avoiding the fountain, you can feel a slippery or slimy coating on the inner walls (biofilm), the water has a musty or slightly sour smell, or there are visible limescale deposits on the outside of the reservoir. If you notice any of these, clean the fountain immediately and replace the filter.

Summary

Cleaning a cat water fountain takes 30 seconds a day and 5 minutes a week. That’s all it takes to keep the water clean, fresh, and appealing for your cat. Skip the soap, dish soap, and bleach — cold water and white vinegar are all you need. Replace the filter every 2 to 4 weeks.

Want to optimize your litter setup too? Check out our self-cleaning litter boxes: automatic, compact, and designed for multi-cat households.