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The Grundfos SL.56H.280.4.50D.100 is intended for permanent submerged installation in municipal wet wells and wastewater transfer stations. Certified under CE EN12050-1, this cast iron unit holds ROHS and WEEE approvals for use in civil utility networks. It is developed for handling untreated wastewater containing large solids in infrastructure requiring consistent discharge pressure.
This model incorporates a 28 kW 4-pole motor operating on a 3 x 415 V supply with a rated current of 60.5 Amps. It achieves a maximum head up to 43 m and a maximum flow up to 9180 L/min at a rated speed of 1490 rpm. The system is designed for continuous S1 duty in untreated wastewater at temperatures ranging from 0°C to 40°C.
The hydraulic system uses an Open S-tube impeller with a 363.2 mm actual diameter to handle solids in untreated wastewater. The nominal duty head is 26.85 m. Featuring a DN 200 inlet and a DN 100 outlet, this hydraulic design supports high-volume wastewater transfer while reducing the risk of clogging in high-demand municipal networks.
Built with an EN-GJL-250 cast iron pump housing and motor casing, the unit features 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. The pump is compatible with the Grundfos auto-coupling system (96090994).
FEATURES
- Open S-tube impeller with a 363.2 mm actual diameter for solids handling in municipal wastewater networks.
- Cast iron EN-GJL-250 pump housing and motor casing for structural durability in permanent submerged service.
- 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 thermal safety.
- Supplied with a 10-metre S1BC4N8-F EMC power cable for reliable electrical connection.
- IP68 enclosure suitable for installation depths up to 30 metres with a 10 bar maximum operating pressure.
- Compatible with the Grundfos auto-coupling system (96090994) for simplified maintenance access.
- Class H motor insulation with support for up to 30 starts per hour during continuous S1 duty cycles.
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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