The Fluval Motor Seal Ring for 106, 206, 306 & 406 Canister Filters is the genuine motor seal ring for Fluval's 06 Series canister filters — the O-ring between the motor head and the canister, and the part that fails silently.

Key Features

• Seals the motor head to the canister body
• A perished or displaced seal ring is the commonest cause of a canister that will not prime, draws air, or leaves a damp patch in the cabinet
• Cheap, and worth replacing on sight rather than waiting for it to fail
• Made by Fluval, the aquatics brand of Rolf C. Hagen, which has been building aquarium filters since 1975

Fitting It

• Unplug anything electrical before putting your hands in the tank
• Disconnect the hoses and take the unit to a sink rather than working over the tank
• Check the old part against the new one before fitting. If they differ, stop and check the model number
• A smear of silicone lubricant on an O-ring before reassembly makes the next service much easier and helps the seal sit properly
• Prime the filter and watch the first few minutes of running for leaks before you walk away

Good To Know

• The listing's model reference has been inconsistent — this part is the motor seal ring for the 06 Series canisters. Check the part number against your unit before ordering
• A smear of silicone lubricant on an O-ring before reassembly makes the next service much easier and helps the seal sit properly
• Seat the ring in its groove all the way round before closing the head. A pinched O-ring is a leak
• A genuine Fluval spare part. Check the model number against your unit before ordering — Fluval part numbers look alike and do not cross over between series
• Fluval sells these individually so a filter can be repaired rather than replaced, which is usually the cheaper and greener option
• Keeping a spare impeller and O-ring in the cupboard saves a tank when something fails on a weekend