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 

Frequently asked questions

If you are a distributor, you can use the Sauermann website to learn more about our wide assortment of pumps and accessories, and contact us directly to make an order.

If you are an installer, you can use our database of distributors. If you are unable to find a distributor in your area, please contact us.

If you are an end user, ask an installer in your area.