The filter dryer from the refrigeration circuit — the small canister that traps moisture and debris in the refrigerant line. It is replaced as a matter of course whenever the sealed system has been opened.
This is not an owner-serviceable part. Fitting it means recovering and recharging refrigerant, which is licensed work in Australia. Order it for your refrigeration technician.
Teco is made in Italy and its spare parts are model-specific — check the model plate on the back of your unit before ordering. See the full Teco range, including the Teco TK aquarium chillers themselves.

