Remotely Above the Unit

 If you need high capacity pump performance in a compact, mini pump design the Si-33 is the ultimate choice on the market.

Suitable for 8.5 ton units
Locking power cord
Mounting bracket allows for versatile installation options
Integrated drain safe device assures trouble-free operation

Technical details

Max flow rate8 gph
Max discharge head43 ft
Max suction head13 ft
Max pressure60 ft
Insulation classDouble insulation
Mains supply120V: (SI33UL01US12) / 230V: (SI33UL01US23)
Operation conditions40%: 3s ON - 5s OFF
Weight1.10 lb
Master pack quantity20
Safety switch 
NC 8A resistive - 250 V
Detection unit
Thermal protection 
239 deg. F (auto-reset)

Pump dimensions

Pump2 5/8''1 3/4''2 3/8''
Detection unit2 1/4''1 1/2''1 1/2''
Packaging5 5/16''5 5/16''3 17/32''

Detection levels


Pump sound levels

at 3,3ft or 1m according to EN ISO3744 (dBA)< 34
Kit contents 
Si-33 pump
Detection Unit - SI2958, 2' cable
Clear PVC Tubing, 1/4" i.d. fitted with a Drain Safe Device
Anti-Vibration Mounting Bracket
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"
Mounting Rail
Tie Wraps (6)
Safety standards 
UL/CSA by Intertek
Technical data sheet 
Wiring diagram