PHPI catches up with Neal Saunders, Sales Director, Grundfos Domestic Building Services, to find out more about the new GO range from Grundfos.
Q. Why has Grundfos introduced the new GO range?
Grundfos has stood for innovation in pump technology for 80 years now. Our circulators are at home in millions of heating systems worldwide – but today it’s about much more than just a new pump. It’s about a new era of connectivity, flexibility, and efficiency. We have asked thousands of installers worldwide: What can we do even better? The result is impressively clear: 80% of the installers surveyed want a pump that is not only highly efficient but also offers high replacement compatibility and perfectly adapts to installation needs. In short: A pump that is easy to install and universally applicable. Just like our new GO models.
The GO range was developed to simplify pump replacements and improve system performance. With just two models—UPS4 GO and ALPHA2 GO—installers can cover the majority of domestic heating circulator replacements, including both UPS and UPM3/UPM4 types. It’s about making life easier on-site, reducing van stock, and ensuring first-time fixes.
Q. How many pumps are part of the new range?
There are two pumps in the GO range:
– UPS4 GO – designed for replacing older UPS models.
– ALPHA2 GO – for replacing integrated boiler pumps, post-2015 UPM3/UPM4 models
Together, they cover nearly 70% of boiler circulator replacements, meaning installers only need two pumps on the van.
Q. For what kind of situations has the new GO range been designed?
The GO range is tailored for domestic heating systems, particularly service and maintenance scenarios. Whether replacing a traditional UPS pump or a more complex integrated boiler circulator, the GO range offers reliable, energy-efficient solutions. It’s especially useful for post-ErP boilers and systems where performance and compatibility are key.
Q. What are the features of the UPS4 GO?
Designed for both stand-alone and integrated circulators in domestic heating applications, the new UPS4 GO provides enhanced comfort and energy savings for residents. For installers, it makes pump replacements quick and hassle-free.
– Easy replacement of integrated UPS circulators and stand-alone
– Self-venting pump
– Dry-running protection
– Improved wiring
– Robust startup
– Display read-out
Q. What are the features of the ALPHA2 GO?
Designed for both stand-alone and integrated circulators in domestic heating applications, the new ALPHA2 GO provides enhanced comfort and energy savings for residents. For installers, ALPHA2 GO simplifies commissioning, takes the guesswork out of achieving efficient systems with guided setup, and makes pump replacements quick and hassle-free.
– Easy replacement of integrated UPM3 and UPM4 circulators and stand-alone
– Guided setup via GO app
– Improved AUTOADAPT for radiators and floor heating
– Air detection and system venting
– Dry-running protection
– Improved wiring
– Robust startup
– Display read-out
Q. When on a job, how can engineers check to see which replacement pump is required?
Installers can use the Grundfos GO app. Simply enter the product number of the old pump, and the system will recommend the correct replacement. The app also supports boiler search functionality and provides commissioning reports, setpoint calculations, and bypass valve guidance.
Q. Do you have any other installation advice for engineers?
Yes—make sure you have the Grundfos GO app on your phone.
The Grundfos GO app goes beyond just recommending a suitable pump replacement. It’s designed to replicate the performance profile of older boiler pumps — especially UPM3/4 models — which often have externally controlled settings that aren’t visible or adjustable from the pump head alone.
The app helps ensure the correct flow rate, bypass valve setting, and ΔT optimisation, which are crucial for system efficiency and comfort. In short, the app isn’t just for reading — it’s for matching and replicating the original pump’s behaviour, especially in more complex or integrated systems. If you’re replacing a pump from a boiler post-2015, the ALPHA2 GO paired with the app is a game-changer.
IMAGE: Grundfos
