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For deep groundwater extraction and borehole systems requiring additional hydraulic lift, the 4ZN612/11 provides an eleven-stage radial flow pump end within the ZN6 six-inch range. Its higher stage count provides the additional head required for deeper groundwater applications while maintaining a maximum flow of 275 L/Min.
The pump-end construction uses AISI 316 stainless steel, with AISI 316L stainless steel impellers and diffusers incorporating removable wear rings. The rotating shaft is Duplex stainless steel UNS S 31803 and the replaceable coupling is Duplex stainless steel UNS S 32304. With a C4S motor, the installation operates within the motor-compatible temperature range up to 60°C and permits suspended sand up to 100 g/m³.
The 4ZN612/11 reaches a maximum head of 124 metres, with hydraulic performance specified to EN ISO 9906 Grade 3B. Its discharge connection is the standard Rp 2 1/2” (65 mm) threaded port, while the standard 4-inch NEMA motor connection permits coupling with a C4S submersible motor. Maximum immersion depth is 300 metres when paired with C4S motors.
At the discharge end, the microcast ASTM CF-8M (AISI 316 cast) head and lower support incorporate the integrated stainless steel non-return valve. Pre-drilled holes provide a defined attachment point for safety hooks, supporting the lowering and securing of the pump end during borehole installation.
FEATURES- The eleven-stage radial hydraulic arrangement provides substantially greater lift than the lower-stage versions.
- Removable wear rings provide a serviceable arrangement for maintaining the hydraulic clearances.
- AISI 316L impellers and diffusers provide the specified stainless-steel construction for the hydraulic stages.
- The Duplex UNS S 31803 shaft provides the specified material for the rotating assembly.
- The Duplex UNS S 32304 coupling is replaceable and forms part of the motor coupling arrangement.
- AISI 316L tie rods, cable guard and strainer extend the corrosion-resistant construction through the assembly.
- The integrated stainless steel non-return valve is incorporated into the microcast discharge assembly.
* Submersible motor sold separately - requires coupling and assembly
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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