Which water filter fits the PetKit Filter Unit RECT?

The PetKit Filter Unit RECT takes the PetKit Filter Unit RECT (EverSweet Max Cordless) (part Filter Unit RECT). Compatible filters made to the same specification also fit.

How often should I replace the water filter in my PetKit Filter Unit RECT?

Every 1 months. Flow slows and performance drops off as the filter fills up, so it's worth doing on time.

Where can I buy the Filter Unit RECT in Australia?

We link to 1 Australian seller for the Filter Unit RECT; the seller's page shows the current price.

How do I fit the Filter Unit RECT in a PetKit Filter Unit RECT?

No tools, a few minutes: 4 steps, listed on this page with the replacement video where the maker has one.

Pet fountain water filter · PetKit

PetKit Filter Unit RECT (EverSweet Max Cordless)

Part codeFilter Unit RECT

Replace every 1 months
Fits inside the fridge
Fits 1 model

PetKit Filter Unit RECT (EverSweet Max Cordless)

Sellers from

—

1 seller compared

The rectangular Filter Unit RECT for the cordless EverSweet Max. Five per pack; change monthly.

Reduces

Hair and debris
Chlorine taste (carbon)

Change: Every 30 days
Pack: 5 filters

Every number this part goes by

Retail name:: PETKIT Filter Unit RECT

Where to buy

Every seller we track for this part, cheapest first. Genuine is the manufacturer's own part; compatible is a third-party filter made to fit. Prices are re-checked daily where the seller publishes them. Last checked 6 September 2026.

ManufacturerGenuine partSee price

How long it lasts

Replace every 1 months — the app reminds you.

After fitting: Reset the filter timer in the PetKit app.

Flow slows and taste drops off as the filter fills up. Changing on time is the whole point of the filter.

Not due yet?

This filter is due every 1 months. We'll email you when it's time — free, no spam.

Fitting it

A few minutes, no tools. Watch it done, then follow the steps.

EVERSWEET MAX & EVERSWEET MAX 2 | Cleaning GuidePETKIT OFFICIAL (official) · YouTube

1Soak the new filter in clean water for at least ten minutes.
2Unplug or switch off the fountain, lift the top tray off and lift the old filter out.
3Seat the soaked filter in the body the same way round and refit the tray.
4Fill, power on, and reset the filter timer in the PetKit app (or hold the button until the light clears).

Will it fit your appliance?

Type your model number and we'll check it against our fitment database.

Fits these models

PetKit1 model

EverSweet Max

Common questions

Which water filter fits the PetKit Filter Unit RECT?: The PetKit Filter Unit RECT takes the PetKit Filter Unit RECT (EverSweet Max Cordless) (part Filter Unit RECT). Compatible filters made to the same specification also fit.
How often should I replace the water filter in my PetKit Filter Unit RECT?: Every 1 months. Flow slows and performance drops off as the filter fills up, so it's worth doing on time.
Where can I buy the Filter Unit RECT in Australia?: We link to 1 Australian seller for the Filter Unit RECT; the seller's page shows the current price.
How do I fit the Filter Unit RECT in a PetKit Filter Unit RECT?: No tools, a few minutes: 4 steps, listed on this page with the replacement video where the maker has one.

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