Max flow rate
Available in 

The high capacity Si-33 (30l/h) is suitable for air-conditioning units from 20 kW up to 30 kW.

The piston pump inside the Si-33 is specifically designed for removing condensates from air conditioning systems in any environment.

High resistance to pollution
High performance
Proven Reliability
Drain Safe Device
Low sound level

Technical details

Max flow rate8 gph, 30 l/h
Max discharge head43 ft, 13 m
Max suction head13 ft, 4 m
Max pressure60 ft, 18 m
Insulation classDouble insulation
Mains supply230V~ 50/60Hz - 21 W
Operation conditions50% : 3s ON – 3s OFF
Weight0,48 kg
Master pack quantity20
Safety switch 
NC 8 A resistive - 250 V
Block Detection
Thermal protection 
115°C (auto-reset)

Pump dimensions

Pump66 mm43,5 mm60 mm
Detection unit55 mm38 mm37,5 mm
Packaging135 mm135 mm90 mm

Detection levels

ON16 mm
OFF11 mm

Pump sound levels

at 3,3ft or 1m according to EN ISO3744 (dBA)< 34
at 3,3ft or 1m in application (dBA)<= 36
Kit contents 
Si-33 pump
Clear PVC tube int. diam. 6mm – L: 1m, fitted with a « Drain Safe Device » pre-mounted
Anti-vibration mounting bracket
1.5 m lockable plug-in power cable: 2 power wires, 2 safety switch wires.
6 tie wraps, 2.5 x 100mm
Detection unit (SI2958, 1.5m cable)
Detection unit installation kit: rubber elbow 90°, vent tube, mounting rail, adhesive
Safety standards 
RoHS and WEEE directives 
Technical data sheet