Under the Unit

The compact, sleek design of the Omega Pack is the ideal choice for  convenient under unit mounting.  The onboard Si-20 provides you Sauermann's high performance pumping capacities, yet with ultra quiet operation.

Modern, slim design for an attractive installation
Left or right side mounting
Ultra quiet operation
Versatility to remove the Si-20 allowing for in-unit mounting

Technical details

Max flow rate5 gph
Max discharge head33 ft
Max suction head10 ft
Max pressure46 ft
Insulation classDouble insulation
Mains supply120V: (OPUL01UN12) / 230V: (OPUL01UN23)
Operation conditions120V: 50%: 3s ON - 3s OFF / 230V: 60%: 3s ON - 2s OFF
Weight1.61 lb
ColorRAL 9010 - Pure White
Master pack quantity6
Safety switch 
NC 8A resistive - 250 V
Integrated 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''
Duct12 7/8''2 1/4''2 1/2''
Packaging14 1/8''3 3/8''4''

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)
Shell (2-part: backplate & cover)
Screws & plugs for affixing backplate
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