ROJECO 2L Stainless Steel Cat Fountain Replacement Filter
This ROJECO replacement filter set is made for the ROJECO 2L Stainless Steel Cat Water Fountain. Fresh filters trap hair, dirt and food debris before they reach the pump, which keeps the water clear and the fountain running smoothly. Each set pairs an activated carbon filter with a sponge filter, so the water passes through two stages before your cat drinks it.
Double filtration: filter plus sponge
The set works in two stages. The sponge filter catches hair, debris and larger particles first. The activated carbon filter then deals with the finer impurities, and the manufacturer states that it also removes residual heavy metals.

Sponge filter
The sponge is the first line of defence. It filters out hair, debris and large particles so they never reach the pump or build up in the water.

Filter materials
Each filter pad is built from two layers: granular activated carbon and a nonwoven fabric cover. The fabric holds the carbon in place and filters out fine particles as water flows through.

Key features
- Made for the 2L fountain: fits the ROJECO 2L Stainless Steel Cat Water Fountain.
- Two filtration stages: an activated carbon filter plus a sponge filter.
- Traps hair and debris: keeps the water clean and clear and protects the pump.
- Easy to swap: a four-step change with no tools needed.
- Change every 2 to 4 weeks: regular changes keep the water fresh.
Specifications
| Fits | ROJECO 2L Stainless Steel Cat Water Fountain |
|---|---|
| Filter stages | Activated carbon filter and sponge filter |
| Filter materials | Granular activated carbon and nonwoven fabric |
| Carbon filter size | 3 in x 1.7 in (about 7.6 cm x 4.3 cm) |
| Sponge size | 1.38 in x 1 in (about 3.5 cm x 2.5 cm) |
| Replace every | 2 to 4 weeks |
| In the pack | 4 x filter pads and 4 x sponges, as shown in the product photo |

Before first use: rinse and soak
New filters should be rinsed and soaked before they go into the fountain:
- Rinse the new filter under running water.
- Soak it in a clean bowl for 5 minutes.
- Make sure it is fully soaked before you turn the fountain on. Otherwise the water may not diffuse through the filter and could overflow.
- Do not soak the filter inside the fountain tank, because this leaves dust on the surface of the water.


How to change the filter
- Unplug the fountain and lift off the pump housing.
- Take out the used sponge and filter.
- Fit the new sponge and the soaked filter in the filter compartment.
- Put the pump housing back, plug in and check the water flows.

For a full clean of the fountain itself, see our guide to how to clean a pet fountain step by step, or learn the signs your cat's water fountain needs cleaning.
Good to know
Do not use soap or detergent on the filters. Rinse with clean water only. This is a filter set only, and the fountain is sold separately. Please check your fountain model before ordering.
Frequently asked questions
How often should I change the filter?
Every 2 to 4 weeks. Change it sooner if the water looks cloudy or the flow slows down.
Do I need to soak a new filter?
Yes. Rinse it, then soak it in a clean bowl for 5 minutes before fitting it, so water can pass through evenly.
What is in the pack?
4 filter pads and 4 sponges, as shown in the product photo.
Which fountain does it fit?
The ROJECO 2L Stainless Steel Cat Water Fountain. Browse other fountains and spare parts in our pet water fountain collection.
Want to know how the carbon layer works? Read how activated carbon filters in fountains work.