# Pet Fountain Filters and Replacement Parts (2026): Which Filter Fits Which Fountain > Which replacement filter fits Catit, PETLIBRO, PETKIT, PetSafe Drinkwell and Veken fountains, what each maker says is inside it, and how often each says to change it. - Source: https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts - Publisher: PetProofLab (https://petprooflab.com) - Published: 2026-09-28 - Category: food-feeding - Tags: fountain filters, cat water fountain, replacement filters, Catit, PETLIBRO, PETKIT, PetSafe Drinkwell, fountain cleaning - Method: picks chosen from Amazon listings and brand specs; not hands-on tested; current Amazon prices are on the page; content checked 2026-09-28. - Quick answer: Buy the filter your fountain's maker names: Catit's Triple Action filter for full-size Flower Fountains (every 30 days), PETLIBRO's own filters for Dockstream and stainless models (every two weeks with one pet), PETKIT Filter Unit 3.0 for Eversweet Solo and 3 Pro models or Filter Unit RECT for the Eversweet Max cordless, and PetSafe's numbered carbon filters for Drinkwell fountains (every 2 to 4 weeks). All of those are sold on Amazon by Amazon.com or the brand. Veken's filters were not, when we checked. ## Key takeaways - Filter intervals differ by maker: Catit every 30 days; PETLIBRO every two weeks for one pet; PetSafe Drinkwell every 2 to 4 weeks; PETKIT 30 days in normal mode and 60 in smart mode for Filter Unit 3.0. - Most of these filters combine a hair-catching layer (mesh, non-woven fabric or foam) with activated carbon; Catit and PETLIBRO add ion exchange resin to soften hard water, per each maker. - The filter is not the whole job. Catit says to take the pump apart every two weeks; PETLIBRO says to wipe the fountain weekly; PETKIT says to clean it weekly in summer. - PETLIBRO and PETKIT both tell you to soak a new filter before fitting it (5 and 10 minutes), and PETKIT says to reset the fountain afterwards. - Catit, PETLIBRO and PetSafe each say their fountains should use their own filters; third-party 'compatible' packs are not covered here. ## Products (chosen from listings, not tested) 1. **Catit Triple Action Fountain Filters, 5 Pack** (details: https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts#product-B0748H3GKN) — The filter for any full-size Catit Flower Fountain; Catit says to change it every 30 days. - Pros: Cotton mesh, active carbon and ion exchange resin, per Catit; Fits the Catit Flower Fountain, LED Flower Fountain, Stainless Steel Flower Fountain and Stainless Steel Drinking Fountain, per the listing; Sold by Amazon.com; also sold in 2 and 12 packs - Cons: Does not fit the Flower Fountain Mini, per Catit 2. **PETLIBRO Dockstream Replacement Filters, 4 Pack with Sponges** (details: https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts#product-B0FBRP16X2) — The filter for a Dockstream or Dockstream 2; soak it five minutes and rinse it before use, PETLIBRO says. - Pros: Four layers per the listing: non-woven fabric, activated carbon, ion exchange resin and a foam pre-filter; Fits Dockstream models PLWF106, PLWF116, PLWF105, PLWF115, PLWF005 and PLWF305; the listing says it is designed for the Dockstream 2; Each filter and sponge packed separately; sold by Amazon.com - Cons: Four filters last about two months on PETLIBRO's two-week schedule 3. **PETLIBRO Stainless Steel Fountain Replacement Filters, 8 Pack** (details: https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts#product-B09G697C4P) — The filter for PETLIBRO's stainless steel fountains, changed every two weeks. - Pros: Cotton layer, activated carbon and ion exchange resin, per the listing; Fits the 2 L and 3 L PETLIBRO Stainless Steel fountains (PLWF003 and PLWF006); Sold by Amazon.com - Cons: Does not fit the Dockstream models 4. **PETKIT Filter Unit 3.0, 5 Pack** (details: https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts#product-B0BVQPJRLH) — The filter for most plug-in PETKIT Eversweet fountains; PETKIT says 30 days in normal mode, 60 in smart mode. - Pros: Double filter components and a high-density micropore filter, per PETKIT; Fits Eversweet 2S, 3, 3 Pro, Solo, Solo 2 and Solo SE, per the listing; The fountain's indicator light tells you when to change it; sold by PETKIT-US - Cons: PETKIT says to soak each new filter 10 minutes and reset the fountain after every change 5. **PETKIT Filter Unit RECT, 5 Pack** (details: https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts#product-B0CXJC1CW5) — The rectangular filter for the Eversweet Max cordless, changed every 2 to 4 weeks per the listing. - Pros: Double filter components and a high-density micropore filter, per the listing; Each filter individually packaged; the PETKIT app reminds you when to change it; Sold by PETKIT-US - Cons: The listing names only the Eversweet Max cordless; PETKIT's own Eversweet Max 2 page offers the same RECT filter as its add-on 6. **PetSafe Drinkwell Replacement Carbon Filters, 360 Fountains, 12 Pack** (details: https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts#product-B072J8RDFN) — The carbon filter for any Drinkwell 360; PetSafe says change it every 2 to 4 weeks. - Pros: Activated carbon made from coconut shells, per PetSafe; Fits the Drinkwell Stainless Multi-Pet and plastic 360 fountains; Sold by Amazon.com - Cons: Carbon only: the 360's hair-catching foam filter is a separate part 7. **PetSafe Drinkwell Premium Carbon Filters, 12 Pack** (details: https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts#product-B071J2B3YR) — The filter for a Drinkwell Platinum or Original, with 2 to 4 weeks of use per filter. - Pros: Coconut shell carbon plus a dual-density polyester pad that traps hair, per PetSafe; Fits the Drinkwell Outdoor Dog, Everflow, Multi-Tier, Original, Platinum, Zen and Mini fountains; Sold by Amazon.com - Cons: Does not fit the 360 or the ceramic and stainless models 8. **PetSafe Drinkwell Replacement Foam Filters, 2 Pack** (details: https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts#product-B0085NVFTE) — A pump-protecting foam pad for Drinkwell ceramic and steel fountains; match the part number in your manual first. - Pros: Traps loose hair and debris before it reaches the pump, per the listing; For Drinkwell ceramic and stainless steel fountains; Sold by Amazon.com - Cons: The listing gives no replacement interval and does not name the models it fits A fountain filter has to match the fountain, and the only reliable match is the one its maker names: Catit's Triple Action filter for a full-size Flower Fountain, PETLIBRO's own filters for a Dockstream or stainless model, PETKIT's Filter Unit 3.0 or RECT for an Eversweet, and PetSafe's numbered carbon filters for a Drinkwell. This page lists which filter fits which fountain, what each maker says is inside it, how often each maker says to change it, and how often to clean the pump, which matters as much as the filter. **How we chose:** we did not test these filters; we matched each one to its fountains using the makers' own pages and listings, and kept only filters sold by Amazon.com or the brand's own store that were in stock on September 28, 2026. ## Which filter fits which fountain | Fountain | Maker's filter | What's in it (per maker) | Change it (per maker) | Clean the pump or fountain | Sold by | Amazon price | |---|---|---|---|---|---|---| | Catit Flower Fountain (full size, LED, stainless) | [Triple Action, 5 pack](https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts#product-B0748H3GKN) | Cotton mesh, active carbon, ion exchange resin | Every 30 days, or when visibly saturated | Take the pump apart every two weeks | Amazon.com | see the current Amazon price on the page | | PETLIBRO Dockstream and Dockstream 2 | [Dockstream filters, 4 pack](https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts#product-B0FBRP16X2) | Non-woven fabric, activated carbon, ion exchange resin, foam | Every two weeks with one pet | Wipe weekly | Amazon.com | see the current Amazon price on the page | | PETLIBRO Stainless Steel 2 L and 3 L | [Stainless filters, 8 pack](https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts#product-B09G697C4P) | Cotton layer, activated carbon, ion exchange resin | Every two weeks | Wipe weekly | Amazon.com | see the current Amazon price on the page | | PETKIT Eversweet Solo, Solo 2, Solo SE, 3 Pro | [Filter Unit 3.0, 5 pack](https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts#product-B0BVQPJRLH) | Double filter components, micropore filter | 30 days normal mode, 60 days smart mode | Weekly in summer, every 2 to 3 weeks otherwise | PETKIT-US | see the current Amazon price on the page | | PETKIT Eversweet Max and Max 2 (cordless) | [Filter Unit RECT, 5 pack](https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts#product-B0CXJC1CW5) | Double filter components, micropore filter | Every 2 to 4 weeks | Weekly in summer, every 2 weeks otherwise | PETKIT-US | see the current Amazon price on the page | | PetSafe Drinkwell 360 (plastic and stainless) | [360 carbon filters, 12 pack](https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts#product-B072J8RDFN) | Coconut shell carbon | Every 2 to 4 weeks | No interval given; steps only | Amazon.com | see the current Amazon price on the page | | PetSafe Drinkwell Platinum, Original and others | [Premium carbon filters, 12 pack](https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts#product-B071J2B3YR) | Coconut shell carbon, polyester pad | Every 2 to 4 weeks | No interval given; steps only | Amazon.com | see the current Amazon price on the page | | PetSafe Drinkwell ceramic and stainless | [Foam filters, 2 pack](https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts#product-B0085NVFTE) | Foam | Not stated | No interval given; steps only | Amazon.com | see the current Amazon price on the page | | Veken C1, C1 Classic, D1, D1 Pro | Veken F1 series filters | Filter media, coconut shell carbon, scale inhibitor, pre-filter sponge | Not stated on the listing | Not stated on the listing | Third party (no card) | | Sources for each row: [Catit's filter page](https://www.catit.com/products/drinking-fountains/triple-action-fountain-filters/) and [cleaning guide](https://www.catit.com/spotlight/catit-flower-fountain-cleaning-guide/); [PETLIBRO's filter guidance](https://petlibro.com/pages/how-often-should-i-change-the-filters) and its [Dockstream 2 page](https://petlibro.com/products/dockstream-2-smart-fountain); [PETKIT's Filter Unit 3.0 page](https://www.petkit.com/products/filter); PetSafe's [360 filter page](https://www.petsafe.com/p/drinkwell-360-charcoal-filters-3-pack/PAC00-13712/), [premium filter page](https://www.petsafe.com/p/drinkwell-premium-carbon-filters-3-pack/PAC00-13070/) and [cleaning steps](https://www.petsafe.com/p/drinkwell-fountain-cleaning-kit/CKPH/). The Veken, PETKIT RECT and PETLIBRO stainless details come from their Amazon listings. ## What the layers do, in each maker's words Most fountain filters stack two or three jobs into one cartridge. **A hair and debris layer.** Catit calls its outer layer cotton mesh that "catches stray hairs and other debris." PETLIBRO's Dockstream filter uses non-woven fabric plus a foam pre-filter sponge, which its listing says "further filters debris to prevent blockages and damage." PetSafe puts a polyester pad on its premium carbon filter and sells a separate foam filter that, per the listing, "protects pump components from clogs and wear." This is the layer that saves the pump, since hair is what jams it. **Activated carbon.** Every filter here has it. Catit says its carbon "helps remove foul odors and impurities"; PetSafe says its coconut shell carbon "removes bad tastes and odors from water." **Ion exchange resin.** Catit and PETLIBRO add it. Catit says the resin softens water by filtering out excess calcium and magnesium; PETLIBRO's listing says it "removes heavy metal ions and softens water quality." If your tap water leaves white scale on the kettle, a filter with resin is the one to pick. PETKIT describes its Filter Unit 3.0 more generally, as "double filter components and a high-density micropore filter" that "remove pet hair and most other impurities." Several makers also claim their filters help with urinary health. Those are marketing claims, not something a filter maker can show on a product page, so we leave them out. ## How often to change the filter, maker by maker The intervals are not the same, so write down the one for your fountain. - **Catit:** "Replace every 30 days for optimal results," or when the filter is visibly saturated. Catit also says Flower Fountains are for use only with Catit filters. - **PETLIBRO:** "We recommend replacing the filters every two weeks to ensure your pet always has access to fresh water if used by one pet," and more often with several pets. The same rule appears on the Dockstream 2 page and in its filter listings. - **PETKIT Filter Unit 3.0:** "Replace every 60 days in smart mode and 30 days in normal mode," per PETKIT's own filter page, which adds that the fountain's indicator light will tell you. The Amazon listing for the same filter gives only the 30-day figure, and PETKIT's Eversweet Solo 2 page says every four weeks, so 30 days is the safe reading. - **PETKIT Filter Unit RECT:** every 2 to 4 weeks, per its listing, with a reminder in the PETKIT app. - **PetSafe Drinkwell:** "Each filter provides 2-4 weeks of filtration" for the premium filter; the 360 filter should be replaced "every 2 to 4 weeks to maintain water freshness." With several pets, use the short end of any range. PETLIBRO says so outright, and a filter clogged with more hair stops doing its job sooner. **Before you fit a new one:** PETLIBRO's listings say to soak the filter for 5 minutes and rinse it for 30 seconds, so loose carbon dust does not end up in the water. PETKIT says to soak its filters for at least 10 minutes and to "reset the device after replacing filter," or the reminder light keeps counting from the old one. ## Pumps: the part that actually fails A fresh filter in a dirty fountain does little. Each maker gives its own cleaning schedule, and they are shorter than the filter schedules. - **Catit:** "The pump should be removed from the fountain and disassembled for cleaning on a biweekly basis." Use warm water, a soft sponge and dish soap, and "never use aggressive detergents or an abrasive sponge," per its cleaning guide. - **PETLIBRO:** a quick wipe of the fountain interior "once a week" and a thorough clean of all parts with dish soap, more often with more pets. The Dockstream 2 is pump-free: PETLIBRO says a magnetic rotor in the tank is driven from the base, so there is a rinseable rotor instead of a submerged pump. - **PETKIT:** clean the fountain and change the water "once a week in summer and every 2-3 weeks in other seasons" (Filter Unit 3.0 page), or every two weeks outside summer for the Eversweet Max (RECT listing). Its Solo 2 listing says a dirty pump is the usual cause of weak flow or a noisy pump. - **PetSafe:** its cleaning steps start "Unplug the fountain. Dump the water. Disassemble the fountain," then wash the impeller and brush out the motor cavity. PetSafe says the fountains are "dishwasher safe except for the motor and cord," but the page does not give an interval. PetSafe and PETKIT also sell spare pumps; the Drinkwell 360 listing names its replacement pump part number (PAC00-13206), and PETKIT lists a replacement wireless pump on Amazon. If a cleaned pump still rattles or stops, that is the part to replace, not the filter. For fountains themselves, compared by material and capacity, see our [cat water fountain guide](https://petprooflab.com/food-feeding/cat-water-fountains). Our [Catit Flower vs PETLIBRO fountain comparison](https://petprooflab.com/food-feeding/catit-flower-vs-petlibro-fountain) sets the two most common filter schedules side by side, and our [PETKIT vs PETLIBRO comparison](https://petprooflab.com/food-feeding/petkit-vs-petlibro) covers each brand's feeders and fountains and what they run on. ## Why bother: what Cornell says about fountains The Cornell Feline Health Center's [hydration page](https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information/feline-health-topics/hydration) says cats need "about 4 ounces of water per five pounds of lean body weight per day, so the average 10-pound cat should drink about one cup of water per day." On fountains it is careful: "Some cats increase their intake of water when provided with water fountains, but individual preferences among cats for these varies." Its first suggestion is simpler than any gadget: fresh water, in places the cat can easily reach, with no other pet guarding it. So a fountain is worth keeping only if your cat uses it, and it is only as clean as its filter and pump. If a filter change slips by a month, a plain bowl washed every day is the cleaner option. If your cat's drinking changes suddenly, more or less, ask your vet rather than changing the fountain ([why we say that](https://petprooflab.com/about#veterinary)). ## Genuine filters, third-party packs and Veken Searches for "fountain filter" on Amazon turn up many third-party packs "compatible with" Catit, PETLIBRO, PETKIT and Veken fountains, often with more filters per box. We left them out. They are not sold by the fountain's maker, and three of the makers say something about it: Catit says its Flower Fountains are "only for use with certified Catit filters," PETLIBRO's listings say off-brand filters "may cause leaks/pump failure," and PetSafe calls its own filters "the only filter brand certified to fit" the 360 fountains. We cannot check those claims, but they are the makers' terms, and a leak or a failed pump is the risk they name. **Veken** filters for the C1, C1 Classic, D1 and D1 Pro fountains were sold on Amazon by a company called Aborder Products, not by Amazon.com or a store in Veken's name, so they get no card. The listing describes multi-layer filter media, coconut shell activated carbon, a "composite scale inhibitor" and pre-filter sponges, but gives no replacement interval, and Veken's own site would not load on September 29, 2026 (its security certificate had expired). If you own a Veken fountain, follow the interval in its manual. **PETLIBRO Capsule** fountains take a different filter again: PETLIBRO sells an 8-pack for the Capsule cat fountain (PLWF002) and another for the Capsule dog fountain (PLWF008), both sold by Amazon.com. **Recalls:** we found no FDA or CPSC recall of any of these fountains or filters on our [pet recall page](https://petprooflab.com/recalls) or in the [CPSC recall database](https://www.cpsc.gov/Recalls) on September 29, 2026. The only CPSC recall naming PetSafe that we found was a 2010 recall of power adapters sold with a heated pet bed. ## Frequently Asked Questions ### How often should I change a cat fountain filter? Every 30 days for Catit, every two weeks for PETLIBRO with one pet, 30 days (normal mode) or 60 days (smart mode) for PETKIT Filter Unit 3.0, and every 2 to 4 weeks for PetSafe Drinkwell. Change it sooner with several pets or if it is clogged with hair. ### Can I use a generic filter in my fountain? Some will fit, but Catit says its Flower Fountains take only Catit filters, and PETLIBRO says off-brand filters may cause leaks or pump failure. Buying the maker's filter keeps you inside its instructions. ### Do I need to soak a new fountain filter? PETLIBRO says to soak it for 5 minutes and rinse it for 30 seconds; PETKIT says to soak it for at least 10 minutes and then reset the fountain. Both say it keeps carbon dust out of the water. ### Why is my fountain pump noisy after a filter change? A new filter does not fix a dirty pump. Catit says to take its pump apart every two weeks, and PETKIT says a dirty pump causes weak flow and noise; low water makes most pumps louder too. ### Do fountain filters help with urinary problems? No maker shows evidence for that on its filter page, and Cornell says only that some cats drink more from fountains. If your cat has a urinary problem, ask your vet how to get more water into it. --- *PetProofLab is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. We did not test these filters; materials, fit and intervals are the makers' own, from their sites and listings.* ## Sources - catit.com: [Catit's filter page](https://www.catit.com/products/drinking-fountains/triple-action-fountain-filters) - catit.com: [Catit flower fountain cleaning guide](https://www.catit.com/spotlight/catit-flower-fountain-cleaning-guide) - petlibro.com: [PETLIBRO's filter guidance](https://petlibro.com/pages/how-often-should-i-change-the-filters) - petlibro.com: [Dockstream 2 page](https://petlibro.com/products/dockstream-2-smart-fountain) - petkit.com: [PETKIT's Filter Unit 3.0 page](https://www.petkit.com/products/filter) - petsafe.com: [360 filter page](https://www.petsafe.com/p/drinkwell-360-charcoal-filters-3-pack/PAC00-13712) - petsafe.com: [Premium filter page](https://www.petsafe.com/p/drinkwell-premium-carbon-filters-3-pack/PAC00-13070) - petsafe.com: [CKPH page](https://www.petsafe.com/p/drinkwell-fountain-cleaning-kit/CKPH) - vet.cornell.edu: [Hydration page](https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information/feline-health-topics/hydration) - U.S. Consumer Product Safety Commission: [CPSC recall database](https://www.cpsc.gov/Recalls) --- Last updated: 2026-09-28 Canonical URL: https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts How to cite: "Pet Fountain Filters and Replacement Parts (2026): Which Filter Fits Which Fountain", PetProofLab, https://petprooflab.com/food-feeding/fountain-filters-and-replacement-parts (checked 2026-09-28). Disclosure: as an Amazon Associate PetProofLab earns from qualifying purchases. Safety information summarizes public guidance and is not medical advice.