kactoily YPD-C004P, YPD-C004S Cat Water Fountain Filter and Sponge Replacement, 12 Pack, for 135 fl oz/4L fountain

Each cat water fountain filter in this 12-pack is built for the kactoily YPD-C004P and YPD-C004S fountains, and the box also holds 12 filter sponges and 12 pump sponges. The cartridges measure 27 x 14 x 3.5 cm and weigh 240 g in total. The set covers a full year of changes at a two-week interval.

Does this filter fit your fountain?

The cartridges are made for two wireless fountain models, YPD-C004P and YPD-C004S, and the fountain in your home needs to be one of them before an order makes sense. The 135 fl oz/4L capacity of those fountains is the figure the parts are cut for.

If your fountain carries a different model number, these cartridges are not the right size for it.

Soaking and rinsing before the first use

Before a cartridge goes into the fountain, the manufacturer directs you to soak it for 5 minutes and then rinse it thoroughly. A second instruction puts the soak at 3 to 5 minutes with a running-water rinse afterwards.

One stated purpose of the soak is to stop loose carbon particles from blocking the pump.

What the three filter layers and the sponges do

Inside each cartridge sit three layers: high density cotton, ion exchange resin and coconut shell activated carbon. The carbon takes chlorine and odour out of the water, and the resin filters heavy metals.

• The pack pairs every cartridge with a filter sponge and a pump sponge, so the foam parts are renewed at the same time as the carbon layer.
• Twelve cartridges let you work through a year of changes at a fortnightly pace without reordering.
• The white cartridges weigh 240 g for the full set, which keeps a single replacement light in the hand.
• Because the cotton, resin and carbon are stacked in one body, a single cartridge carries all three stages of the flow.

What comes in the box

• 12 replacement filter cartridges
• 12 filter sponges
• 12 pump sponges

Questions about the 12-pack

How many cartridges does the box contain?

Twelve cartridges come in the box, alongside 12 filter sponges and 12 pump sponges for a total of 12 sets.

How often should the cartridge be changed?

The manufacturer suggests a new cartridge every 2 to 4 weeks, and more often when several pets share the fountain.

What are the cartridge dimensions?

Each cartridge measures 27 x 14 x 3.5 cm, or 10.6 x 5.5 x 1.4 in.

What is inside the filter?

High density cotton, ion exchange resin and coconut shell activated carbon make up the three layers.

Should the cartridge be soaked before use?

Yes. The manufacturer asks for a 3 to 5 minute soak in water and a rinse under running water before the cartridge goes in.