Which filters does the Festool CT SYS take?

Cartridge filter 500558, Dust bag 500438, Dust bag 500642.

Festool CT SYS shop vac filters: 500558

Cartridge filter

Pleated cartridges clog with use. Replace one that stays dirty after a rinse.

Shop the cartridge filter on Amazon Other models that use 500558

Dust bag

Bags made to fit this model's inlet and tank.

Shop the dust bag on Amazon Other models that use 500438

Dust bag

Bags made to fit this model's inlet and tank.

Shop the dust bag on Amazon Other models that use 500642

1Cartridge filter500558

2Dust bag500438

Part numbers come from Festool (source 1, source 2), checked November 7, 2026. Amazon buttons open a search for the part number; we may earn a commission.

Where the model number is

On a label on the motor head or the side of the tank.

Other Festool shop vacs

CT 48CT 48 ACCT MIDICT MIDI ICT MINICT MINI ICTC MIDICTC MINICTC SYSCTL MIDI