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Product Description
Sauermann condensate pump, defrost water pump, mini pump SI-20 for air conditioning systems, oscillating piston pump 20 l/h
With its extremely slim housing, the Si-20 pump can be installed in any air conditioning unit or duct. This mini pump features a market-leading size-to-performance-to-noise ratio and absolute reliability.
The patented oscillating piston technology guarantees condensate drainage in air conditioning systems up to 20 kW and is extremely energy-saving.
Installation in the air conditioning unit
Low noise
Exceptional performance
For air conditioners up to 20 kW
Maximum reliability
The new generation of pump core
The new generation of the Si-20 pump core has been significantly reduced in size without compromising the top performance of Sauermann's patented oscillating piston technology, which has proven its extremely high efficiency for over 12 years. This results in a flow rate of up to 20 liters per hour, unique for this format.
Learn more about the new Si-20 pump
The slimmest mini pump on the market with a cross-section of only 27 x 27 mm
Excellent power-to-noise ratio: only 19 dBA
Can be installed in all standard air conditioning units
Withstands all environmental influences
Scope of delivery:
1 oscillating piston pump with 1.5 m long power cable: 2 wires for power supply, 2 wires for safety switch
1 float switch (SI2958, power cable 1.5 m)
1 Transparent PVC hose with an inner diameter of 6 mm - Length: 60 mm, with a pre-assembled “Drain Safe Device” ventilation
1 PVC hose with an inner diameter of 6 mm - length: 0.63 m with insulating foam
1 90° angle connector with an inner diameter of 15 mm x length 152 mm
1 vent hose with an inner diameter of 4 mm x 75 mm
1 mounting rail
1 self-adhesive strip
3 wire hose clamps
3 cable ties 2.5 x 200 mm
1 mounting kit: 1 mounting plate + rubber vibration damper
Technical details:
Maximum flow rate: 20 l/h
Maximum head: 10 m
Maximum pressure: 14 m
Maximum suction height: 3 m
Insulation class: Double insulation
Power supply: 230 V~ 50 Hz - 14 W
Operating conditions: 100% - continuous
Weight: 0.46 kg
Safety switch: NC 6 A resistive – 250 V
Detection: Detection block
Pump dimensions:
Pump:
Length: 180 mm
Width: 27 mm
Height: 27 mm
Packaging:
Length: 173 mm
Width: 160 mm
Max. flow rate: 20 l/h
Max. delivery head: 10 m
Maximum pressure: 14 m
Max. suction height: 3 m
Noise level: 19 dBA
Insulation class: double insulated
Power supply: 230V~ 50 Hz - 14 W
Max. condensate temperature: 35 °C
Functional cycle: 100% - continuous operation
Protection class: IPX2
Safety contact: Normally closed (NC) 6 A resistive load - 250 V
Detection: Float switch
Pump dimensions: L 180 x W 27 x H 27 mm
Weight (with packaging): 0.46 kg
Subject to technical changes and errors! Subject to prior sale! Illustration similar!
Technical Data
Installation
Notes
Manufacturer Information
Sauermann GmbH Leibnizstraße 6 74211 Leingarten Deutschland + 49 (0)7131 39 99 90 info.germany@sauermanngroup.com
Our Services at a Glance
At Clima-Air, we see ourselves primarily as a service provider.
That’s why our service doesn’t end with delivery.
Individual and professional consultation
Installation and commissioning of air conditioning systems
Annual maintenance and service of your air conditioner
Do you have questions or need assistance?
Feel free to use the form on our contact page to send us a message or call us directly using the number below. Our customer service team will do their best to answer all inquiries promptly.

