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The Grundfos SL.56L.215.6.50D.300 is designed for high-volume transfer in wastewater pumping stations and large-scale municipal networks. This cast iron model holds CE EN12050-1 certification along with ROHS and WEEE approvals. It is intended for permanent submerged installation in systems handling raw effluents and untreated wastewater containing solids.
Powered by a 21.5 kW 6-pole motor operating at 990 rpm on a 3 x 415 V supply, the pump achieves a maximum flow up to 22440 L/min and a maximum head up to 16 m with a rated current of 51 Amps. The unit is rated for continuous S1 submerged duty in liquids between 0°C and 40°C.
The hydraulic system uses an Open S-tube impeller with a 390.9 mm actual diameter for solids handling. The nominal duty head is 9.02 m. The design features DN 300 inlet and outlet connections with DIN flange standards, supporting consistent wastewater transfer while reducing the risk of clogging in collection sumps.
Construction features an EN-GJL-250 cast iron pump housing and motor casing with double mechanical shaft seals. Protection is provided by integrated PTO sensors for motor protection and monitoring. The unit 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 with 390.9 mm actual diameter for handling untreated wastewater containing solids.
- EN-GJL-250 cast iron pump housing and motor casing for structural integrity in submerged wet wells.
- 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 windings for safety.
- Supplied with a 10-metre S1BC4N8-F EMC power cable for reliable electrical connection in pump stations.
- IP68 enclosure suitable for installation depths up to 30 metres and 5 bar maximum operating pressure.
- Class H motor insulation with support for up to 30 starts per hour during continuous S1 duty cycles.
- Compatible with the Grundfos auto-coupling system (96255839) for simplified maintenance access.
FAQs
General Product FAQs
1. How do I choose the right pump for my setup?
Selecting the correct pump depends on your required flow (L/min), total head (vertical lift + friction loss), and power source. If you're unsure, contact our team and we’ll size the right system for you.
2. Do you offer support with system design or setup?
Yes — we provide expert advice to help you choose, install, and optimise your pump system. Whether it's a simple setup or a custom solution, we’re here to help.
3. Do you offer complete pump solutions or just products?
We don’t just sell pumps — we provide complete solutions. From accessories and control systems to full packaged setups, we can supply everything required to get your system running efficiently.
Shipping & Availability
1. Do you offer Australia-wide shipping?
Yes — we ship across Australia. Bulk or oversized orders may incur additional freight charges otherwise we offer free shipping over $100*
2. How long does delivery take?
Orders are typically shipped within 1–2 business days, with delivery taking approximately 2–7 days depending on your location.
3. What courier or freight companies do you use?
We work with a range of trusted carriers including Australia Post, StarTrack, TNT, and other national freight providers depending on the size and location of your order. This allows us to ensure fast, reliable delivery across Australia, including regional and remote areas.
Warranty & Support
1. Do your pumps come with a warranty?
Yes — all products are backed by manufacturer warranties. Warranty periods vary depending on the brand and product type.
2. What support do you offer after purchase?
We provide ongoing support including:
- Installation advice
- Troubleshooting
- Spare parts supply
- System upgrades
3. What is the warranty process if something goes wrong?
If you experience an issue, simply contact our team with your order details and a description of the problem. We’ll guide you through troubleshooting and, if required, arrange repair, replacement, or manufacturer assessment in line with warranty terms.
Why choose Foundation Pumps?
1. Why choose Foundation Pumps over other suppliers?
We focus on supplying proven, high-quality pump solutions backed by real industry knowledge. Unlike general resellers, we understand how these systems perform in the field and provide honest, practical advice to ensure you get the right solution the first time.
2. Do you offer expert advice before and after purchase?
Yes — we support you at every stage, from selecting the right pump through to installation and ongoing use. Our team is available to assist with sizing, troubleshooting, and system optimisation whenever you need it.
3. Do you stock trusted brands and quality products?
We carefully select and supply pumps from reputable manufacturers known for reliability and performance. Our range includes both industry-leading brands and high-value alternatives that meet Australian standards and conditions.
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