The Fluval Primer Assembly for 107, 207, 307 & 407 Canister Filters is the genuine primer assembly for Fluval's 07 Series canister filters — the button you press to start the siphon after a service.

Key Features

• Fits the Fluval 107, 207, 307 and 407 canister filters
• The primer is what fills the canister after a service. When it perishes, the filter has to be primed by hand, which is a two-person job with a jug
• A small part that makes the difference between a five-minute service and a wet afternoon
• 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 previous title spelled this part 'Primier'. It is the primer assembly
• A primer that has stopped working usually has a perished diaphragm or valve inside rather than a broken button
• A smear of silicone lubricant on an O-ring before reassembly makes the next service much easier and helps the seal sit properly
• 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