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Municipal wastewater systems and centralized lift stations are the primary applications for the Grundfos SL1.100.100.75.4.50B.C, a high-capacity submersible pump certified under CE EN12050-1. This cast iron unit is intended for permanent installation in civil wet wells and is developed for handling raw effluents containing large solids in high-demand municipal networks.
The unit features a 7.5 kW 4-pole motor operating at 1462 rpm on a 3 x 415V supply with a rated current of 14.4 Amps. It achieves a maximum head up to 19.5 m and maximum flow up to 4866 L/min. The motor is designed for continuous S1 duty in untreated wastewater with temperatures between 0°C and 40°C. The motor is cooled by the surrounding pumped liquid during normal submerged operation.
An S-tube impeller provides a 100 mm free passage for untreated wastewater containing solids while helping reduce the risk of clogging. Hydraulic connections include a DN 150 inlet and a 4" (100 mm) outlet with DIN flanges. This single-vane hydraulic path facilitates the conveying of raw effluents through municipal discharge piping.
Built with an EN-GJL-250 cast iron pump housing and motor casing, the unit includes a double mechanical SIC/SIC seal system. Integrated PTC sensors and moisture sensors are used for seal and motor monitoring. Motor safety is provided by winding-embedded thermal switches, 10 metres of LYNIFLEX power cable, and an IP68 enclosure rating. The pump is suitable for installation depths up to 7 metres.
FEATURES
- S-tube impeller with 100 mm free passage for processing wastewater with high solids content.
- 7.5 kW 4-pole motor operating at 1462 rpm on a 3 x 415V three-phase supply with 14.4 Amps rated current.
- DN 150 inlet and 4" (100 mm) discharge connection for high-volume fluid trajectories in municipal networks.
- Double SIC/SIC mechanical shaft seals with an oil chamber for redundant moisture defence for the stator.
- Integrated PTC sensors and moisture detection for advanced motor health and thermal monitoring.
- Built-in thermal switches within the stator windings for automatic protection against electrical damage.
- 10-metre rugged LYNIFLEX power cable and IP68 enclosure for continuous operation in deep wet wells.
- CE EN12050-1 certified for use in municipal wastewater systems and centralized lift stations.
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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