• Genuine Fluval A20101 — factory head for the 107, so gasket land, clip geometry and hose ports line up first time.
• Restores the full 550 L/h rating — a worn motor is the usual reason a clean 107 still pushes almost nothing.
• Sealed 10 W motor — the winding is potted and not user-serviceable, which is why it sells as one assembly.
• Weigh it against a whole filter first — the 107 is the smallest in the range, so the gap between a head and a complete unit is narrower here than on any other 07.

• 1 x genuine Fluval motor head for the 107, part A20101, with sealed motor, pump housing, mains lead and plug

Fluval supplies this head bare. A head fitted without an impeller will not pump.

• The magnetic impeller. Order the impeller with ceramic shaft and rubber bushings (A20109), or move the old one across if it is clean and unchipped.
• The impeller cover. See the impeller cover (A20113).
• The motor head gasket. Reusable if still soft, but a head swap is the moment to renew it — see the motor head gasket (A20038).
• The canister, baskets and media. This is the top section only; the canister case for the 107 is separate.

The motor head maintenance kit for the 107 (A20094) covers the wear items in one go.

It fits the Fluval 107 and nothing else. It does not fit the 207, 307 or 407, each of which takes its own head; nor the 106, 105 or earlier, whose heads are a different assembly; nor any FX-series filter. Fluval does not list A20101 as superseding or superseded by any other part, and it is not shared with any other brand.

The four 07 heads are not interchangeable — each is matched to its own canister and motor rating. The model code is printed on the compliance label under the canister.

Fluval publishes three figures for the 107, describing three different situations. Only the middle one resembles a real installation.

Fluval publishes no intermediate points, so no curve is reproduced here rather than an interpolated one being invented. Expect flow to fall steadily as lift, hose length and elbow count increase. Note also that Fluval measures output at 120 V / 60 Hz; Australian units run at 240 V / 50 Hz, where the published draw is 10 W.

Suitable for a 107 that trips a safety switch, hums without pumping, has a cracked pump housing, or leaks from the motor body rather than the gasket. Also for a second-hand 107 bought without a working head.

Not suitable for a filter that is merely clogged, air-locked or has a kinked hose — none are head faults. If the filter runs but is noisy, try the impeller and shaft first; they cost a fraction as much and are the more common culprit.

Supplied for 240 V / 50 Hz with an Australian plug. Unplug at the wall before removing the head, and never power it up with the canister open or dry — the bushings are water-lubricated and a dry start does measurable damage.

The mains lead is moulded into the sealed motor and cannot be replaced separately, so a damaged cord makes the head scrap rather than a repair. Run the filter on an RCD-protected circuit and form a drip loop in the lead. To make the head last, wipe the rotor chamber at every service — grit and calcium there is what scores the chamber and eventually kills the motor — and lubricate the gasket with silicone lubricant, never petroleum jelly.

• 07 output nozzle — for a return jet that has gone brittle or discoloured
• Media basket cover — worth checking while the head is off, since a cracked one lets water bypass the media
• Motor head for the 207 — if the compliance label says you have the other model

Supplied as a genuine Fluval service part. Fluval does not publish a separate warranty term for individual replacement parts; the published warranty attaches to the complete filter. Your rights under the Australian Consumer Law apply in full and nothing stated here limits them. Ships as a standard parcel anywhere in Australia, with no dangerous goods restrictions.

Does the Fluval A20101 motor head come with the impeller?

No. Fluval supplies the A20101 motor head without the magnetic impeller and without the impeller cover. Both are separate parts, and the filter will not pump without an impeller fitted.

Will a Fluval 207 motor head fit a 107?

No. The 107 takes A20101 and the 207 takes A20102. The two canisters share a footprint and an impeller, but the heads are different motor ratings and are not interchangeable.

Is a Fluval 107 motor head worth fitting, or should I buy a new filter?

On the 107 the answer is closer than on the larger models, because it is the smallest and cheapest filter in the range. Compare the head plus impeller against a complete 107 before deciding. On the 307 and 407 the rebuild is clearly better value.

My Fluval 107 hums but no water moves. Is the head the problem?

Usually not on first check. A hum with no flow is most often a stuck or broken impeller, an air lock, or a closed AquaStop valve. Replace the impeller first; if the hum persists with a new one fitted, the head is the fault.