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Functioning as an automated heavy duty, submersible stainless steel grey water pump, the Grundfos UNILIFT AP12.50.11.A1 provides autonomous fluid management. It is structurally tailored for handling clean water, storm water, and slightly dirty wastewater across domestic and light industrial sites. The unit features an integrated float switch for hands-free operation, making it ideal for permanent sump installations or portable temporary drainage tasks.
Consistent hydraulic displacement relies on a heavily optimized 1.1 kW motor core. Running directly on a 1 x 240 V single-phase grid, the system draws a rated 8.5 Amps under full load. The internal mechanics forcefully push liquids out of a 50 mm female connection, successfully maintaining an impressive maximum flow of 500 L/Min. When pumping against vertical gradients, the unit reliably achieves a 17 metre maximum head.
Managing cloudy environmental run-off necessitates a wide internal tolerance for debris. A heavily balanced semi-open stainless steel impeller controls the main fluid vortex, allowing solid matter up to 12 mm to transit safely through the volute. This strategic clearance limits abrasive wear against the central shaft while maintaining the ability to drain standing pools down to a 100 mm minimum clearance level.
Complete environmental sealing ensures an IP68 classification, safely protecting the motor down to a 7-metre underwater depth. An intelligent cooling jacket surrounds the drive, regulating core thermals to facilitate continuous, safe pumping during partial fluid exposure. Dictated by the automatic float trigger, the pump effortlessly manages 55°C liquids and withstands ambient fluids between pH 4 and 10.
FEATURES
- Equipped with a tethered float switch to provide fully automated start and stop drainage operation.
- Constructed from 304 stainless steel across all wetted parts to permanently resist industrial corrosion.
- Features an integrated motor cooling jacket for safe, extended operation during partial submersion.
- Utilizes a semi-open impeller design capable of continuously passing solid particles up to 12 mm in size.
- Rated with an IP68 enclosure class to safely permit underwater installations down to a 7-metre maximum depth.
- Certified to process a broad range of liquid chemistry, accommodating fluids with a pH value between 4 and 10.
- Engineered to safely tolerate 55°C liquid temperatures, and up to 70°C for brief two-minute intervals.
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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