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Operational efficiency in municipal wastewater networks is maintained by high-performance hydraulic units designed for continuous service. The Grundfos SL.100.185.2.52S.N.51D.A.T submersible pump provides the torque and discharge capacity necessary for high-volume effluent transfer. Operating at temperatures up to 40°C, the system ensures stable circulation in lift stations and collection pits prone to varying fluid ingress. This unit is intended for lift station applications where reliable solids passage and infrastructure protection are required.
Hydraulic performance is provided by an 18.5 kW motor operating on a 415v three-phase supply with a rated current of 36 Amps. This model achieves a maximum flow of 4,686 L/min and reaches a maximum head of 46 m. The motor utilizes a star-delta starting method to optimize electrical consumption and manage start-up loads in deep-pit applications. Electrical connection is established via a 15-metre power cable to facilitate distribution for subsurface wastewater handling.
Internal fluid paths utilize an Open S-Tube impeller designed for the free passage of solids in suspension. This centrifugal configuration facilitates the movement of contaminated liquids without internal contact that compromises volumetric efficiency during prolonged discharge. By utilizing a high-efficiency hydraulic design, the unit minimizes friction and vibration to protect the rotating assembly during wastewater transfer. The Open S-Tube design prevents clogging in municipal collection pits and drainage stations.
Mechanical integrity is reinforced by a heavy-duty cast iron housing and motor shell with an IP68 protection rating for depths up to 20 m. Motor protection is anchored by a double mechanical shaft seal arrangement featuring silicon carbide faces in an oil bath. This model includes integrated moisture sensors and thermistors to facilitate operational monitoring of the motor assembly. The architectural casting features a DN 100 inlet and DN 100 outlet for integration into standard wastewater infrastructure.
Features
- Open S-Tube impeller configuration facilitates high-velocity solids handling and prevents internal blockages in municipal wastewater networks.
- Heavy-duty cast iron pump housing and motor shell offer the structural durability needed for deep pit site installations.
- Double mechanical shaft seal with silicon carbide faces in an oil bath ensures protection for the 18.5 kW motor.
- IP68 protection rating allows for permanent immersion in sewage collection pits at installation depths up to 20 metres.
- Integrated thermistors and moisture sensors enable proactive maintenance for the electrical assembly.
- Maximum operating pressure of 8 bar supports integration into large-scale pressurized sewage collection systems.
- Rated current of 36 Amps and star-delta starting method provide the hydraulic torque needed for high-head transfer.
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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