Roll over image to zoom
SKU: 92850522
Grundfos SL.56L.185.6.50D.300 Cast Iron Low-Head Stormwater Pump with Open S-Tube Impeller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Designed for stormwater drainage and municipal flood control, the Grundfos SL.56L.185.6.50D.300 is intended for permanent submerged installation in stormwater basins. This cast iron unit holds CE EN12050-1 certification with ROHS and WEEE approvals. It is developed for handling untreated wastewater containing solids in civil drainage networks.
An 18.5 kW 6-pole motor running at 990 rpm powers the pump on a 3 x 415 V supply with a rated current of 48 Amps. It achieves a maximum flow up to 20940 L/min and a maximum head up to 15 m. The unit is rated for continuous S1 duty in untreated wastewater at temperatures between 0°C and 40°C.
The hydraulic system uses an Open S-tube impeller with a 379.4 mm actual diameter to manage solids in untreated wastewater. The nominal duty head is 8.28 m. The pump features DN 300 inlet and outlet connections, supporting high-volume wastewater transfer while reducing the risk of clogging in high-capacity drainage networks.
Built with an EN-GJL-250 cast iron pump housing and motor casing, the unit includes double mechanical shaft seals and integrated PTO sensors for motor protection and monitoring. It is supplied with a 10-metre S1BC4N8-F EMC power cable and an IP68 enclosure suitable for installation depths up to 30 metres.
FEATURES
- Open S-tube impeller design with 379.4 mm diameter for handling untreated wastewater containing solids.
- Cast iron EN-GJL-250 pump housing and motor casing for durability in permanent submerged basins.
- Double mechanical shaft seal arrangement with SiC/SiC primary seal and Silicon Carbide/Carbon secondary seal.
- Integrated PTO sensors for motor protection and monitoring within the stator for operational safety.
- Supplied with a 10-metre S1BC4N8-F EMC power cable for reliable electrical connection in municipal basins.
- IP68 enclosure suitable for installation depths up to 30 metres with a 5 bar operating pressure limit.
- Class H motor insulation with support for up to 30 starts per hour during continuous S1 duty cycles.
- DN 300 inlet and outlet connections optimized for high-volume wastewater transfer in drainage networks.
IMPORTANT: Bulk freight charges apply. Please contact us for a freight quote before ordering.
SPECIFICATIONS
| Max Flow | 20940 L/Min |
| Max Head | 15 m |
| Power | 18.5 kW / 415v |
| Rated Current | 48 Amps |
| Suitable For | Stormwater Drainage |
| Body Material | Cast iron |
| Liquid Temperature | Maximum 40°C |
| Inlet Size | 300 mm |
| Outlet Size | 300 mm |
| Warranty | 24 Months |
Warranty & Returns
All products supplied by Foundation Pumps are covered by a minimum 12-month warranty unless otherwise stated. Some brands may offer longer manufacturer warranties. Warranty covers manufacturing defects, faulty materials and workmanship under normal use.
- Products must be installed correctly and in accordance with the manufacturer’s instructions.
- Warranty does not cover incorrect installation, misuse, dry running, normal wear and tear, unauthorised repairs or damage caused by external factors.
- Proof of purchase, photos, videos and installation details may be requested when assessing a warranty claim.
- The customer is responsible for returning the product to Foundation Pumps or the nominated service centre unless otherwise agreed.
- Removal, reinstallation, labour and associated site costs are generally the customer’s responsibility unless required under Australian Consumer Law.
- Change-of-mind returns may be accepted within 30 days provided the product is unused, uninstalled and returned in its original packaging.
- Customers are responsible for return freight costs for change-of-mind returns.
- Restocking fees may apply to special-order, bulky or non-stocked products.
- Used, installed or specially ordered products may not be eligible for change-of-mind returns.
- If a product arrives damaged or faulty, please contact Foundation Pumps as soon as possible so we can assist with the appropriate repair, replacement or refund.
Your rights under Australian Consumer Law are not affected.
What auto-coupling mounting base connects this pump to discharge risers?
Mechanical mounting for the Grundfos SL.56L.185.6.50D.300 is configured around a standard Auto-coupling for straightforward pit alignment.
What peak fluid displacement volume can this pump deliver?
Displacing fluid into connected headers, the SL.56L.185.6.50D.300 sustains up to 20940 L/Min of volumetric throughput.
What total dynamic head can this pump overcome in vertical pipework?
Vertical elevation capability on the SL-56L-185-6-50D-300 reaches a maximum dynamic head of approximately 15 m under rated conditions.
What electrical connection and motor power run this pump?
Powered by a dedicated 18.5 kW motor, the SL 56L 185 6 50D 300 connects to 415 V three-phase mains power with a rated current draw of 48 Amps.
What primary water management tasks is this pump best suited for?
Everyday water management duties for the SL/56L/185/6/50D/300 focus on Smooth passage of stormwater debris is achieved in via a specialized Open S-tube channel accommodating solids up to 105 mm, providing reliable pumping performance.
Need help choosing the right pump?
Our team of pump experts are here to help you find the perfect solution for your application.
- Free expert advice
- Pump sizing & system recommendations
- Fast response — call or email us