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Submersible sewage drainage pump Unilift AP12

Submersible sewage drainage pump Unilift AP12
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Submersible sewage drainage pump Unilift AP12
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749.04€
Ex Tax: 749.04€
  • Stock: In Stock
  • Brand: Grundfos
  • Model: AP12.40.04.A1
  • Weight: 18.00кг
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Grundfos UNILIFT AP12 – drainage pump with 12 mm free passage

Grundfos UNILIFT AP12 is a single-stage submersible pump designed for pumping drainage water and lightly contaminated grey waste water. The pump allows the passage of solids up to 12 mm and is suitable for permanent and portable installations in domestic, commercial and industrial applications.

12 mm free passage Processes solid particles up to 12 mm without clogging.
Stainless steel All hydraulic parts in AISI 304/316.
Cooling jacket Allows continuous operation in partial immersion.

Main advantages of UNILIFT AP12

  • 12 mm free passage for solid particles.
  • All hydraulic parts made of stainless steel for long life.
  • Cooling jacket and internal riser pipe for continuous operation.
  • Semi-open impeller with L-shaped blades for minimal energy consumption.
  • Highly reliable mechanical shaft seal with oil chamber.
  • Glass-sealed cable entry to prevent water ingress.
  • Engine blocking protection included.
  • Easy access for replacing consumables – cable, float, bearing seal, impeller and rotor.

Applications

  • Pumping into drainage wells and pits inside buildings.
  • Pumping stations and small domestic wastewater treatment plants outside buildings.
  • Industrial and commercial use, for example in evaporative cooling systems.
  • Various applications in agriculture, horticulture, dairy and brewing industries.
  • Emergency situations – flooding inside and outside buildings, pumping water from reservoirs, lakes or pools.
  • Pumping of slightly contaminated grey wastewater from washing machines, sinks and showers.

Suitable liquids

  • Clean, non-aggressive water.
  • Slightly polluted grey wastewater.
  • Drainage and rainwater with small impurities.
The pump is not suitable for liquids containing long fibers, flammable liquids such as oil or gasoline, or aggressive chemicals.

General technical characteristics

Characteristics Value
Pump type Single-stage submersible drainage pump
Working fluid Clean, non-aggressive water and grey waste water
Maximum particle size 12 mm
Liquid temperature range 0–55°C
pH range 4–10
Degree of protection IP68
Insulation class F (155 °C)
Maximum immersion depth 2 m (with 5 m cable), 7 m (with 10 m cable)
Output connection Rp 1½" (AP12.40) or Rp 2" (AP12.50)
Cooling From the pumped liquid via a cooling jacket and internal riser pipe
Engine protection Blockage protection and thermal protection included
Impeller type Semi-open, stainless steel, with L-shaped blades
Sealing gasket Mechanical seal combination with bellows and lip seal with 60 ml oil

Installation

UNILIFT AP12 is suitable for permanent and portable installations. The pump can be installed vertically, inclined or horizontally, with the outlet at the highest point. It is available with a float for automatic start/stop or without a float for manual control via an external controller.

When installed with a float, the level difference between start and stop is adjusted by changing the free length of the cable between the float and the pump handle. The free length should be between 100 mm and 250 mm.

Start and stop levels

For proper operation of the float, the free length of the cable must be a minimum of 100 mm and a maximum of 250 mm. With a longer length, the starts are reduced and the difference in levels increases. With a shorter length, the starts are increased and the difference is reduced.

For AP12.40 the start level is 360 mm (min. 100 mm) to 370 mm (max. 250 mm), and the stop is 230 mm and 100 mm respectively. For AP12.50 the levels are 410/250 mm and 380/110 mm.

Operating modes

  • Automatic mode: With float for automatic start/stop between two liquid levels.
  • Manual mode: Without float, controlled by external controller or manual on/off.
  • Single-phase pumps: With built-in thermal protection and capacitor.
  • Three-phase pumps: Without built-in protection, require an external controller with motor protection.

Component materials

UNILIFT AP12 is constructed entirely of stainless steel for all hydraulic parts, which ensures exceptional strength, corrosion resistance and long service life.

Component Material Standard
Pump housing Stainless steel 1.4301 / AISI 304
Lifting pipe Stainless steel 1.4301 / AISI 304
Impeller Stainless steel 1.4301 / AISI 304
Pump shirt Stainless steel 1.4401 / AISI 316
Shaft (wet part) Stainless steel 1.4301 / AISI 304
Camps Heavy-duty, pre-lubricated ball bearings -
O-rings NBR rubber -
Screws Stainless steel 1.4301 / AISI 304
Oil Shell Ondina X420 -
Cable Neoprene (H07RN8-F) -

Advantages of materials

  • AISI 304 stainless steel: High corrosion resistance and strength for all main hydraulic components.
  • Stainless steel AISI 316: The pump jacket is made of higher grade stainless steel for additional protection against corrosion.
  • Semi-open impeller: Reduces the risk of clogging and provides a free passage of 12 mm.
  • Mechanical shaft seal with oil chamber: Protects seals and motor from water ingress and extends service life.
  • Heavy-duty bearings: Pre-lubricated and sealed for long life and quiet operation.
  • Neoprene cable: High quality, waterproof cable, suitable for submersible work.
All materials that come into contact with water are approved for use with clean and slightly contaminated water. For aggressive environments, consultation with Grundfos is recommended for a suitable version.

Approvals and certificates

Grundfos UNILIFT AP12 has the necessary safety and quality approvals and certificates that guarantee reliable operation in domestic, commercial and industrial applications.

Safety approvals

  • CE marking: The pump meets the requirements of European directives for safety, health and environmental protection.
  • Compliance with European standards: The product has been tested and certified according to applicable electrical and mechanical safety standards.

Component Approvals

  • EN 60335-2-41: Safety standard for submersible sewage pumps.
  • ISO 9906: Standard for hydraulic performance of pumps.

Why are approvals important?

  • Health and Safety: Approvals ensure that the pump meets strict safety and reliability standards.
  • Regulatory compliance: The use of approved products is mandatory in many countries for installations related to wastewater disposal.
  • Trust and quality: Certified products have passed rigorous testing and meet high quality standards.
Before installation, check whether the specific product number has the necessary approvals for your country or region. If additional certifications are required, contact Grundfos or your distributor.

UNILIFT AP12 model comparison

UNILIFT AP12 is available in several versions according to the outlet diameter (40 or 50), power (04, 06, 08, 11), voltage (1-phase 230 V or 3-phase 400 V) and control (automatic with float or manual). The main models are AP12.40.04, AP12.40.06, AP12.40.08 and AP12.50.11.

Characteristics AP12.40.04 AP12.40.06 AP12.40.08 AP12.50.11
Output diameter Rp 1½" Rp 1½" Rp 1½" Rp 2"
Power P2 (50 Hz) 0.4kW 0.6kW 0.8kW 1.1kW
Power P1 (50 Hz) 0.7kW 0.9kW 1.2–1.3kW 1.7–1.9kW
Rated current (1×230 V) 3.0A 4.4A 5.9A 8.5A
Starting current (1×230 V) 12.5A 17.3A 23.0 A 29.9 A
Rotation speed (50 Hz) 2770–2800 rpm 2785–2815 rpm 2780–2810 rpm 2760–2785 rpm
Maximum pressure ~8 m ~11 m ~14 m ~18 m
Maximum flow rate ~12 m³/h ~16 m³/h ~20 m³/h ~32 m³/h
Weight (net) 12.0–12.3 kg 12.5–12.8 kg 13.6–13.9 kg 15.5–15.8 kg
Dimensions (W × H) 216 × 321 mm 216 × 321 mm 216 × 346 mm 241 × 357 mm
Voltage 1×230 V or 3×400 V 1×230 V or 3×400 V 1×230 V or 3×400 V 1×230 V or 3×400 V
Management Automatic (A) or manual Automatic (A) or manual Automatic (A) or manual Automatic (A) or manual

Which model to choose?

  • AP12.40.04: Suitable for small installations with low head (up to 8 m) and moderate flow. Ideal for pumping drainage water from small wells or basements.
  • AP12.40.06: Universal model with a balance between head (up to 11 m) and flow rate. Suitable for larger domestic installations, drainage systems and pumping stations.
  • AP12.40.08: More powerful model with head up to 14 m. Suitable for more demanding applications where higher head or higher flow rate is required.
  • AP12.50.11: The most powerful model with Rp 2" outlet, head up to 18 m and flow rate up to 32 m³/h. Suitable for large installations, industrial applications and pumping stations with high requirements.
All models have a free passage of 12 mm, a temperature range of 0–55 °C, pH 4–10 and a protection rating of IP68. The choice between them depends mainly on the required head, flow rate and outlet diameter for the specific installation.

The technical specifications are in accordance with the provided Grundfos UNILIFT AP12 technical catalogue. Please check the specific product number, voltage, cable length, control type (automatic or manual) and number of phases before ordering.

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