Tank pumps

Powerful, heavy-duty pumps for managing high volumes of condensate.

Our condensate tank pumps are designed to withstand the tough conditions found in large-scale heating, air conditioning and refrigeration systems. 

These models are powerful and durable enough for use with central boilers, refrigerated display cabinets, freezers and multi-cassette air conditioners – all of which produce hot, acidic, fouled, biofilm-heavy and other special types of condensate in large volumes.

Hassle-free installation  

Quick, secure power connection  

Simple hydraulic connection 

Acidic concentrate neutralisation system (optional)  

Outstanding durability  

Easy to service  

Si-82 or Si-83? Choosing between our two star models  

  Capacity Equipment Location
        AC Heating   Refrigeration        
    Domestic use Intensive use Domestic air conditioning Casette Ducted unit
Multi-cassette unit		 Domestic gas-fired condensing boiler Domestic oil-fired condensing boiler Dehumidifier Small refrigerated display cabinet Large refrigerated display cabinet Floor-standing Wall-mounted Under-unit In-unit
si-83 Si-83 x   x   x         x x x  
si-82 Si-82   x   x x   x x   x x    

Si-82: a workhorse for heavy-duty use  

The Si-82 is designed for heavy-duty use with powerful systems that demand a reliable tank pump. It can withstand any conditions, removing up to 500 litres an hour and making light work of even the most aggressive condensates.  

This tank pump is therefore ideal for powerful systems such as multi-cassette and ducted air conditioners, dehumidifiers, refrigerated display cabinets and gas-fired condensing boilers. 

  • Fits into any location  
  • Rugged design and outstanding performance  
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Si-83: a modern, clever pump for residential use  

Sauermann designed the Si-83 with several requirements in mind. The first was to build a model that was more compact than anything else in its class: this pump stands at just 129 mm tall and boasts a 2-litre tank. The second was to offer versatility and unmatched ease of installation. And the Si-83 delivers on this front too, with five condensate inlet options and a mobile app that makes installing it a breeze. 

This condensate tank pump is designed for residential use. It’s compatible with air conditioners of up to 20 kW and gas-fired condensing boilers of up to 40 kW.   

  • Easier to install than anything in its class  
  • Quick, hassle-free servicing
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Si-83 Mobile App 

  • Step-by-step installation guide 
  • Horizontal level checker 
  • Installation-specific accessory finder 
  • Automatic calculations to check installation topology 
  • In-built flashlight function 
Download the app for iOS and Android

Top 5 accessories  

We offer an extensive range of equipment and replacement accessories, many of which are compatible with all makes of pump. Here are the must-have accessories that every HVACR engineer should have in their toolbox!  

Self sealing drainage fitting Ø 10 mm 
For reliably connecting a PVC tube to the exhaust pipe. 

Rigid connector Ø 10 mm 
For connecting two or three PVC tubes. Available in straight, elbow and “T” versions. 

Double wire clamp Ø 10 mm 

For ensuring the connection between the connectors and a clear PVC tube. 

Clear PVC tubing 10 mm 

For connecting the pump to the discharge outlet. 

Condensate inlet adaptor 

For connecting a tank pump to a condensate discharge pipe. Available in various diameters.