Non-Mixing Pumpset with Grundfos UPM3 FLEX – UFH Heat Pump System Control Pack

Non-Mixing Pumpset with Grundfos UPM3 is the ultimate low-temperature underfloor heating (UFH) solution for heat pump systems. This compact, prefabricated non-thermostatic kit includes the high-efficiency Grundfos UPM3 FLEX AS 25-70 130 A-rated circulator pump. It connects flow, return, and pump directly to your UFH manifold—no blending valve needed.

Moreover, this non-mixing pumpset excels in setups with low water temperatures (typically 35–55°C). Therefore, it simplifies installations for air source heat pumps (ASHP), ground source heat pumps (GSHP), solar, or low-temp boilers in homes, bathrooms, extensions, conservatories, or single zones.

The pack features a four-way connector, connecting elbow, and flow tee piece with ½” FBSP tapping for easy temperature/pressure monitoring or overheat thermostat integration.

Key Features of the Non-Mixing Pumpset with Grundfos UPM3

• Non-thermostatic design. Thus, it’s optimised for heat pump and low-temp UFH—no mixing valve required.
• Flexible setup. Choose left-hand or right-hand connection.
• Versatile pipe entry. Side or bottom options add installation ease.
• Angled pump flange. As a result, flow and return pipes stay perfectly level.
• Connections. ¾” inlets to 1” outlet manifold; pump uses standard 1.5″ BSP (1½”) at 130mm centres.
• Durable materials. Nickel-plated brass body/connectors with EPDM seals.
• Robust specs. Handles up to 90°C, 6 bar pressure, 32 lpm flow (pack); pump delivers 7m max head, up to ~3.5 m³/h flow.
• Grundfos UPM3 FLEX AS pump. High-efficiency A-rated, PWM-compatible, 2–52W power, silent operation, EEI ≤ 0.20.
• Pre-assembled & compact. Bolts straight to manifolds—no extra brackets or drilling.

Benefits of the Non-Mixing Pumpset with Grundfos UPM3

First, it slashes installation time. Pre-fabricated kit and pump connect in minutes.

Second, it cuts labour costs. No separate fittings, valves, or custom work needed.

Third, flexibility shines. Fits tight spaces, retrofits, new builds, or heat pump upgrades.

Moreover, it’s ideal for renewables. Pairs seamlessly with ASHP/GSHP/solar—safe, efficient, no overheating risks.

Additionally, the ½” tapping enhances safety. Add overheat protection or diagnostics effortlessly.

Finally, the Grundfos UPM3 delivers top performance. Up to 80% energy savings vs. traditional pumps, reliable circulation for single or multi-loop manifolds, low-noise canned motor.

This Non-Mixing Pumpset with Grundfos UPM3 FLEX AS 25-70 130 provides a fast, flexible, energy-efficient choice for heat pump underfloor heating. Reliable, pro/DIY-friendly, and optimised for modern low-temperature renewable setups.