Sauermann SI-83 2 Litre Condensate Tank Pump for AC & Boiler Systems

Sauermann SI-83 is a 2-litre reservoir condensate tank pump — also known as a tank condensate pump, reservoir pump, or condensate removal pump — designed for air conditioning systems, boilers, and fan coil units where gravity condensate drainage is not possible and higher condensate volumes require a larger capacity tank.

Key Specifications

• Tank capacity: 2 litres
• Max lift (head): 5m
• Voltage: 220–240V AC, 50Hz
• Safety device: built-in float switch with alarm output
• Outlet connection: 6mm (1/4")
• Applications: AC systems, condensing boilers, fan coil units
• Housing colour: White
• Country of origin: France
• SKU: SI-83

Compatible Systems

• Wall-mounted and ceiling cassette AC units
• Ceiling concealed and ducted AC systems
• Condensing boilers
• Fan coil units (FCUs)
• Multiple indoor units draining to a single collection point

Compatible Brands

Suitable for use with Daikin, Mitsubishi Electric, Fujitsu, Panasonic, Samsung, LG, Vaillant, Worcester Bosch, and most other AC and boiler brands.

When to Use This Pump

• Ideal when gravity condensate drainage is not possible and a larger reservoir is needed to handle variable or high condensate flow rates
• Suited to ceiling cassette and ducted installations where condensate volumes are higher than a mini pump can handle
• Use where multiple indoor units drain to a single collection point — the 2-litre tank accommodates combined flow rates
• Also suitable for condensing boiler condensate removal where the boiler drain cannot reach a suitable waste outlet by gravity

SI-83 Tank Pump vs SI-10 Mini Pump — Which Do I Need?

• Sauermann SI-10 — compact inline pump for single wall-mounted split AC units with standard condensate volumes
• Sauermann SI-83 — 2-litre reservoir tank pump for larger systems, cassette units, multiple indoor units, or boiler applications with higher condensate volumes

Also in the Sauermann Range

• Sauermann SI-10 — universal quiet mini pump, 10m head, for wall-mounted splits
• Sauermann SI-20 — world’s slimmest mini pump at 27 x 27mm, 19 dBa
• Sauermann SI-30 — mini piston pump with remote detection float switch
• Sauermann SI-1805 — high-volume 500 L/h tank pump for larger commercial systems

Frequently Bought With

• Castel DH-ADP96 Flexible Condensate Drain Hose – 50m Coil — standard drain hose for condensate pump installations
• Jubilee Clip 9–12mm — for securing the outlet hose connection
• Sauermann Tee Connectors 6mm – Pack of 5 — for multi-unit condensate drain runs

Frequently Asked Questions

Can the SI-83 be used with a ceiling cassette AC unit?

Yes. The SI-83’s 2-litre tank is well suited to ceiling cassette installations where condensate volumes are higher than a mini pump can handle. Check the required lift height against the 5m max head specification.

Can the SI-83 be used for boiler condensate removal?

Yes. The SI-83 is suitable for condensing boiler condensate removal where the boiler drain cannot reach a suitable waste outlet by gravity. It is compatible with the mildly acidic condensate produced by condensing boilers.

What is the difference between the SI-83 and the SI-10?

The SI-10 is a compact inline pump for single wall-mounted splits with standard condensate volumes. The SI-83 is a larger 2-litre reservoir tank pump for higher-volume applications including cassettes, ducted systems, multiple indoor units, and boilers.

Does this pump include a safety float switch?

Yes. The SI-83 includes a built-in float switch with alarm output that triggers when the tank reaches high-water level, protecting the system from overflow.

Is this pump suitable for R32 systems?

Yes. The pump handles condensate water only and is refrigerant-agnostic — compatible with R32, R410A, R22, and all other common refrigerants.

Browse our full range of condensate pumps and Sauermann products.