Philips 4400 Series water filter

Q: Which models does this cover?

The Philips 4400 Series range covers 2 models: EP4444/90, EP4441/50. They all take the same water filter.

Q: Which water filter does the Philips 4400 Series take?

The CA6903. You may see it written as AquaClean, Aqua Clean, CA6903/00, CA6903/10, CA6903/22, CA6903/47. These are all the same filter.

Q: How often should I change it?

Every 2 months. That is the manufacturer's limit and it is a maximum, not a target — they state it as a time or a number of litres, whichever comes first. In a very hard water area we suggest about 6 weeks instead, which is our own advice rather than theirs.

Q: Can I use a cheaper compatible filter?

Yes. The CA6903 is a plain mechanical fitting with no chip and no lock, so a compatible filter of the right shape works the same way as the manufacturer's own.

Every Philips 4400 Series takes the CA6903 filter. That covers the EP4444/90 and EP4441/50. Change it every 2 months. In a very hard water area, change it at about 6 weeks instead. There is no batch number to check on this range. The same filter fits 16 other ranges, so it is easy to get hold of.

The filter you need: CA6903
Change it: every 2 months

Which models does this cover?

2 models are sold under the Philips 4400 Series name. They all take the same filter, so whichever of these you own, this is the right page.

Sold in the UK

EP4444/90

Sold outside the UK

Same machines, different market codes. If yours is one of these, it takes the same filter.

EP4441/50

Which water filter does the Philips 4400 Series take?

The CA6903. The CA6903 page lists every name shops sell it under and every other machine that takes it.

How often should I change it?

Every 2 months.

How often to change the Philips/Saeco AquaClean by water hardness
Your water	Change it	Who says so
Soft, Moderate or hard	every 2 months	Philips does
Very hard	every 6 weeks	We do

The manufacturer's figure is a maximum, not a target — softer water never means you can leave one in longer. Why that is

Can I use a cheaper compatible filter?

Yes. The CA6903 is a plain push-in fitting — no chip, no lock, nothing for the machine to check. A compatible filter of the right shape does the same job as the manufacturer's own.

What else takes the same filter?

16 other ranges in our list take the CA6903. If you own more than one of them, the same filter covers all of them.

See all 17 ranges that take the CA6903

How sure are we about this?

We are confident, but we have not had one of these in our hands.

Every source we hold agrees on which filter the Philips 4400 Series takes. We have not physically confirmed it ourselves, which is the only reason this is not marked as checked.

The part number printed on the filter you are removing is the final word. If it disagrees with this page, trust the cartridge.