Inside the Unit

Take advantage of Sauermann's legendary performance packed in to a compact, versatile design, slim enough for easy in-unit mounting.

Slim design for mounting versatility, including in-unit
Rubber dampers aid in an easy, quiet installation
Integrated drain safe device assures trouble-free operation
Ultra quiet operation

Technical details

Max flow rate5 gph
Max discharge head33 ft
Max suction head10 ft
Max pressure46 ft
Insulation classDouble insulation
Mains supply120V: (SI20UL01UN12) / 230V: (SI20UL01UN23)
Operation conditions120 V - 50%: 3s ON - 3s OFF / 230 V - 60%: 3s ON - 2s OFF
Weight1.10 lb
Master pack quantity6
Safety switch 
NC 8A resistive - 250 V
Detection unit
Thermal protection 
239 deg. F (auto-reset)

Pump dimensions

Pump5 3/8''1 1/2''1 1/2''
Detection unit2 1/4''1 1/2''1 1/2''
Packaging6 3/4''6 3/4''2 7/8''

Detection levels


Pump sound levels

at 3,3ft or 1m according to EN ISO3744 (dBA)<= 22
Kit contents 
Si-20 Piston Pump
Detection Unit - SI2958, 2' cable
Anti-Vibration Rubber Dampers (2)
Clear PVC Tubing, 1/4" i.d. fitted with a Drain Safe Device
Power Cable, 5' (2 power wires, 2 safety wires)
90 Deg Rubber Elbow, 19/32" i.d. x L 6"
Vent Tube, 5/32" i.d. x L 2 15/16"
Split Connector, 1/2" - 10/16"
Double Wire Clamps (3)
Tie Wraps (3)
Safety standards 
UL/CSA by Intertek
Technical data sheet 
Wiring diagram