Subaru 2009 IMPREZA Service Manual page 198

EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)
Tightening torque:
18 N·m (1.8 kgf-m, 13.3 ft-lb)
C: INSPECTION
Make sure that the canister, drain valve and tube
are not cracked or loose.
Canister
EC-02363
EC-02386
EC(H4SO)-8