The Tank Pump Re-Invented

Sauermann engineers have redesigned the tank pump from the inside-out, making the Si-83 more durable, compact, and powerful than any other tank pump in its class, all while redefining just how easy tank pump installation and maintenance can be in the field. The Si-83 even comes with a customized Smartphone App that makes installation both simple and intuitive.

The Si-83 is constructed from rugged materials and components for exceptional durability and reliability. And its unmatched versatility means that the Si-83 tank pump from Sauermann is equally proficient for air conditioning and refrigeration applications as it is for heating applications.

Very High Performances
Quicker & Easier Maintenance
Quicker & Easier Installation in any place
Exceptional Durability and Reliability

Technical details

Max flow rate145 gph
Max discharge head21 ft
Max pressure22 ft
Mains supply120 V~ 60 Hz - 84 W - 1.7 A (SI83UL03UN12). 230 V~ 60 Hz - 110 W - 1.25 A (SI83UL03UN23)
Operation conditions7% non continuous
Max condensate temperature131 °F
Max condensate aciditypH > 2.5 (Gas condensing boilers)
Tank volume0.50 g
Weight5.30 lb
Master pack quantity72
Safety switch 
NC, 5 A - 42 V peak
Thermal protection 
Yes: 248°F (120°C) (auto reset)

Pump dimensions

Pump11 5/16''5 3/4''5 1/16''
Packaging12 3/8''5 15/16''8 15/16''
Kit contents 
One-piece centrifugal pump with ½ gallon (2 l) tank
Integrated barb end check valve, Ø ext. 3/8” (10 mm)
6’ (1.8 m) power cord, US plug
Built-in safety switch, 3’ (1 m) wires, bare ends
Roll of tubing 20’ (6 m), int. Ø 3/8”
Adaptor int. Ø 5/8”- 3/4”- 1” - 1 1/4”- 1 1/2” (15/17 mm - 20 mm - 24/25 mm - 32 mm - 40 mm)
2 screws, 2 plugs
Safety standards 
UL/CSA by Intertek