Sauermann SI-1805 Tank Condensate Pump 500 L/h for Air Conditioning Systems
£73.44
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Sauermann SI-1805 Tank Condensate Pump 500 L/h for Air Conditioning Systems
SI1805
£73.44
Sauermann SI-1805 Centrifugal Tank Condensate Pump — 500 L/h | SI1805SIUN23
The Sauermann SI-1805 is a high-capacity centrifugal tank condensate pump with a 0.5-litre reservoir, capable of evacuating up to 500 L/h and a maximum discharge head of 5.4 m. Designed for column air conditioning units, multi-cassette systems, refrigerated display cabinets, evaporators, and ducted units. Tolerates charged, high-temperature and acidic condensates (pH >3.4) produced by gas condensing boilers. Easily reversible pump and removable tank allow mounting on either side of the application.
Key Features
- 500 L/h max flow rate — high-capacity centrifugal pump
- 5.4m maximum discharge head
- 0.5-litre tank reservoir with an easily removable tank
- Reversible pump — water exit configurable left or right
- New quarter-turn easily removable check valve (Ø ext. 10mm / 3/8")
- 2 inlet holes Ø 24mm and 21mm
- NC float switch safety device — 4A resistive, 250V
- Tolerates acidic condensates, pH >3.4 — suitable for gas condensing boilers
- Oil and acid-resistant float | Mechanical structure resistant to shocks
- IP20 protection rating | Thermal protection 120°C (auto-reset)
- CE and EAC certified | RoHS & WEEE compliant | Made in France
Technical Specifications
| Part Number | SI1805SIUN23 |
| Max Flow Rate | 500 L/h |
| Max Discharge Head | 5.4m |
| Max Pressure (zero flow) | 5.8m |
| Tank Volume | 0.5 litres |
| Outlet Connection | Ø 10mm (3/8") internal |
| Inlet Holes | Ø 24mm and Ø 21mm |
| Detection Levels | ON: 32mm | OFF: 25mm | Safety: 39mm |
| Mains Supply | 230V~ 50/60Hz — 90W |
| Sound Level | ≤47 dBA at 1m |
| Max Condensate Temp | 65°C (80°C short peaks) |
| Max Condensate Acidity | pH >3.4 |
| Safety Switch | NC 4A resistive — 250V |
| Thermal Protection | 120°C auto-reset |
| Operating Conditions | 30%: 3s ON — 7s OFF |
| IP Rating | IP20 |
| Pump Dimensions | 195 × 130 × 132mm |
| Tank Dimensions | 195 × 130 × 43mm |
| Box Dimensions | 235 × 135 × 185mm |
| Weight (with box) | 2.0kg |
| Country of Origin | France |
Kit Contents
- One-piece centrifugal pump with 0.5-litre tank
- Integrated barb end check valve Ø ext. 10mm (3/8")
- Power cable: 2m with European plug
- Safety switch cord: 1m, bare ends
Applications
- Column air conditioning units
- Multi-cassette systems
- Refrigerated display cabinets
- Evaporators
- Ducted units
- Gas condensing boilers and high-efficiency furnaces
Compatible Accessories
- Sauermann ACC00925 Check Valve — Ø ext. 10mm (3/8") — replacement check valve
- Sauermann ACC00936 Inlet Adaptor Ø24/20mm — Pack of 3
- DiversiTech RVT-1/4 Condensate Drain Hose 6mm — 30m
- Jubilee Clip 9–12mm — for securing the outlet hose
Also in the Sauermann Range
- Sauermann SI-10 — universal quiet mini pump, 10 m head
- Sauermann SI-20 — world's slimmest mini pump, 27×27mm, 19 dBa
- Sauermann SI-83 — 2-litre tank pump for cassette, boiler and multi-unit applications
Frequently Asked Questions
- What is the difference between the SI-1805 and the SI-83?
- The SI-83 is a 2-litre tank pump for residential AC up to 20kW and boilers up to 40kW. The SI-1805 is a high-flow 500 L/h centrifugal pump with a 0.5-litre tank, designed for column AC units, multi-cassette units, refrigerated display cabinets, and commercial applications.
- Can the SI-1805 be used for boiler condensate removal?
- Yes. It tolerates acidic condensates down to pH 3.4, making it suitable for gas condensing boilers and high-efficiency furnaces.
- What outlet hose size does the SI-1805 use?
- The SI-1805 uses a Ø 10mm (3/8") internal diameter outlet connection. Use ACC00911 clear PVC tubing or ACC00915 braided tubing.
- Is the pump reversible?
- Yes. The pump is reversible, and the tank is easily removable, allowing the water exit to be configured on either the left or right side to suit the installation.
- Is this pump suitable for R32 systems?
- Yes. The pump handles condensate water only and is refrigerant-agnostic.
Browse our full range of condensate pumps and Sauermann products.