Submersible water pump 1,350 to 3,500 L/h, adjustable flow

Regular price $63.00
Regular price Sale price $63.00
$21.00 × 3 with no fees

This submersible water pump circulates from 1,350 to 3,500 litres per hour depending on the model, with a flow rate adjustable on the front. It feeds hydroponic gutters, a grow bed or the water lift of an aquaponic system, and can also run out of the water, fitted in line.

Ref. SICCE-SYNCRA-15·Water pump
Flow rate : 1,350 l/h
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The summary

  • What you receive: a Sicce Syncra Silent submersible pump with its prefilter, suction cups and two pipe fittings.
  • Four models: 1,350 L/h up to 1.8 m, 2,700 L/h up to 3 m, 2,500 or 3,500 L/h up to 3.7 m.
  • Submersible or inline: the pump works at the bottom of the reservoir or out of the water, connected via its intake.
  • Power consumption: from 0.55 kWh per day for the 23 W model to 1.92 kWh for the 80 W one, running continuously.
  • For a small tank: below 1,000 L/h, the 600 L/h submersible pump is better proportioned.
  • What is sent to you: a parcel weighing 0.65 to 1.94 kg depending on the model, dispatched by tracked parcel from France.

Adjustable submersible pump for gutters, grow beds and aquaponic water lift

Most soilless growing systems rely on continuous circulation: the nutrient solution leaves the reservoir, passes through the gutters or grow beds, then returns to it by gravity. This submersible water pump handles that run with a flow rate of 1,350 to 3,500 litres per hour depending on the model chosen. It sits at the bottom of your reservoir or pond, and its flow can be adjusted without tools to suit the circuit. The same family of pumps fits the hydroponic gutter kits for 10 to 80 plants, where the 1,350 L/h model supplies 40 plants and the 2,700 L/h one supplies 80.

⚙️ An adjustable synchronous motor

The motor is synchronous: its rotor, fitted with a magnet, turns at the frequency of the mains current, which gives it a steady running speed for a power of 23 to 80 W depending on the model. The motor body is entirely encapsulated in resin, so you can leave the pump submerged permanently. A thermal cut-out stops it if it overheats, and the rotor shaft is ceramic on the three largest models. On the front, a regulator fitted to the intake pre-chamber lets you reduce the flow to spare a small network, without changing the pump. Finally, double-height suction cups hold it to the bottom of the tank and limit the transmission of vibrations.

📏 Flow rate and delivery head

The flow rate stated for each model is without any discharge head, that is, when the water comes out at the level of the pump. As soon as the water has to rise to gutters or a growing bed, the flow rate drops, until it reaches zero at the maximum head: 1.8 m for the 1,350 L/h model, 3 m for the 2,700 L/h model and 3.7 m for the two most powerful ones. Choose a model whose maximum head is well above the height of your installation, so that a useful flow remains at the top of the circuit. The 2,500 L/h model illustrates this compromise, as it delivers slightly less than the 2,700 L/h one while keeping pressure up to 3.7 m, which makes it suited to multi-level installations.

1,350 L/h, up to 1.8 m

This model feeds gutters or a grow bed set at a low height above the reservoir, with a power rating of 23 W.

2,700 L/h, up to 3 m

This model doubles the flow rate for long runs of gutters or a large growing bed, with a power of 45 W.

2,500 L/h, up to 3.7 m

This model suits tall installations, on shelves or in tiers, where the water has to climb a large height difference. It draws 65 W.

3,500 L/h, up to 3.7 m

This model offers the highest flow rate in the range, for a large pond or several circuits running from the same reservoir. It draws 80 W.

For a small tank, the 600 L/h pump

If your system fits in a tank of a few tens of litres, an ebb-and-flow table or a hydroponic pot, the 600 L/h submersible water pump is better proportioned than this one. It uses 6.5 W, pushes water up to 0.8 m and is adjusted in the same way on the front panel. You thus keep a gentle circulation where a flow of more than 1,000 L/h would needlessly stir up the solution and cost more in electricity.

Keep the intake submerged, even when fitted in line

The rotor needs water to turn without damaging itself, even in an out-of-water setup: a pump that runs dry deteriorates quickly. Always keep the level of your reservoir above the intake and do not use the pump in water warmer than 35 °C. Plug it into a socket protected by a residual current device of 30 mA or less, and leave a loop in the cable lower than the socket, so that any water running down the cable drips onto the floor instead of reaching the socket.

🐟 Water circulation in aquaponics

In aquaponics, the pump circulates water from the fish pond to the grow beds, where nitrifying bacteria convert the ammonia from the waste into nitrates that your plants can absorb. A common rule of thumb is to pass at least once an hour the entire volume of the pond through the circuit. For a 1,000-litre pond with beds placed 1 m higher, the 1,350 L/h model works close to its limit, since its flow drops sharply at that height, whereas the 2,700 L/h model keeps a comfortable margin. It is best to place the pump in a calm area of the pond or in a sump, with its pre-filter in place so that it draws in neither waste nor fry. The guide to building your aquaponic system covers this sizing step by step.

🔧 Inline fitting and maintenance

For an out-of-water installation, the pump is placed in line, below the level of the tank, so that water reaches the inlet by itself. You remove the flow regulator, screw one fitting onto the inlet and another onto the outlet, then push on the two pipes. The 2,500 and 3,500 L/h models accept a 25 to 32 mm pipe on the inlet, wider than on the outlet, which reduces head loss. For maintenance, unplug the pump, take out the pre-filter and the pre-chamber, then rinse the impeller in clean water while checking the condition of the O-ring. Regular rinsing, more often if the water is heavy with particles, preserves the original flow rate.

Technical specifications

Flow rate and power

Maximum flow rate
1,350 to 3,500 L/hNo head height, depending on the model
Maximum height
1.8 to 3.7 mThe flow drops to zero at this height
Power
23 to 80 W23, 45, 65 and 80 W for 1,350, 2,700, 2,500 and 3,500 L/h
Flow rate adjustment
Front-mounted regulatorTo be removed for an in-line setup

Connection

Delivery
15 to 20 mm or 20 to 25 mmThe smallest diameter fits the 1,350 L/h model
In-line intake
Up to 25 to 32 mmOn the 2,500 and 3,500 L/h models
Feed
220 to 240 V, 50 Hz
Cable
Non-replaceableA damaged cable means replacing the pump

The pump

Models
Sicce Syncra Silent 1.5, 3.0, 3.5, 4.0In order: 1,350, 2,700, 2,500 and 3,500 L/h
Motor
Synchronous, with thermal protection
Water temperature
35 °C maximum
Dimensions
103 x 60 x 78 to 173 x 99 x 118 mm123 x 85 x 105 mm for the 2,700 L/h model
Manufacturing
Italy
Warranty
3 years, rotor excludedExtended by 2 years after registration on the brand's website

To budget for separately

Flexible pipe
18 x 22 mm pipeFor the outlet of the 1,350 L/h model
Electrical protection
30 mA residual currentOn the socket that powers the pump

8 further specifications are available in the detailed view.

In the box

  • 1 Sicce Syncra Silent submersible pump and its cable
  • 1 suction pre-filter
  • Anti-vibration suction cups
  • 2 multi-diameter pipe fittings
  • 1 multilingual instruction leaflet, French included

Flow rates, heads, power ratings, fittings, dimensions and warranty taken from the Syncra Silent manual (ref. 80N178-J) and the brand's data sheet on 07/10/2026. Circulation benchmark for aquaponics: FAO, Small-scale aquaponic food production, 2014.

What flow rate, and at what height?

Four pumps from the same family, differing in the volume they move and the height to which they send the water.

More flow rate, or more head height? The volume to be moved and the height to be cleared are enough to tell the four models apart.

Recommended
1,350 L/hYour choice		2,700 L/hYour choice2,500 L/hYour choice3,500 L/hYour choice
Performance
Maximum flow rate (L/h)1350 L/h2700 L/h2500 L/h3500 L/h
Maximum height (m)1,8 m3 m3,7 m3,7 m
Power (W)23 W45 W65 W80 W
Use
Body no more than 13 cm longYesYesNoNo
Pumps up to 3.7 mNoNoYesYes
Flow rate of 2,700 L/h or moreNoYesNoYes
Flow rate of 2,500 L/h at mostYesNoYesNo
25 to 32 mm inline suctionNoNoYesYes
Price$63.00$110.00$138.00$155.00
1,350 L/hRecommended
Performance
Maximum flow rate (L/h)1350 L/h
Maximum height (m)1,8 m
Power (W)23 W
Use
Body no more than 13 cm longYes
Pumps up to 3.7 mNo
Flow rate of 2,700 L/h or moreNo
Flow rate of 2,500 L/h at mostYes
25 to 32 mm inline suctionNo
2,700 L/h
Performance
Maximum flow rate (L/h)2700 L/h
Maximum height (m)3 m
Power (W)45 W
Use
Body no more than 13 cm longYes
Pumps up to 3.7 mNo
Flow rate of 2,700 L/h or moreYes
Flow rate of 2,500 L/h at mostNo
25 to 32 mm inline suctionNo
2,500 L/h
Performance
Maximum flow rate (L/h)2500 L/h
Maximum height (m)3,7 m
Power (W)65 W
Use
Body no more than 13 cm longNo
Pumps up to 3.7 mYes
Flow rate of 2,700 L/h or moreNo
Flow rate of 2,500 L/h at mostYes
25 to 32 mm inline suctionYes
3,500 L/h
Performance
Maximum flow rate (L/h)3500 L/h
Maximum height (m)3,7 m
Power (W)80 W
Use
Body no more than 13 cm longNo
Pumps up to 3.7 mYes
Flow rate of 2,700 L/h or moreYes
Flow rate of 2,500 L/h at mostNo
25 to 32 mm inline suctionYes

Flow rates, heights, power ratings and dimensions taken from the Syncra Silent instruction leaflet and the manufacturer's data sheet, on 07/10/2026.

Product videos

Introduction to the Syncra Silent pump by the manufacturer

The Syncra Silent pump in operation

Getting started with the 1,350 L/h model, in German

Documents & manuals

Syncra Silent instruction manual

The instruction leaflet details the nine models in the range, in-line installation, maintenance and the warranty, in eight languages including French.

PDF · 0,7 Mo

Download

Estimate your
delivery time

Pump dispatched by tracked parcel from France. Exact shipping costs and final delivery times are displayed at checkout once your address has been entered. Outside the European Union, import duties and taxes are the responsibility of the recipient.

Frequently asked questions

8 questions

6 key questions, 8 in the detailed view

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