Grundfos UPS2 15-50/60 Boiler & Heating Pump Review

In this review, we’ll cover all the major details relating to the Grundfos UPS2 15-50/60 heating pump, and where to find them cheap, both offline and online.

If you are replacing a central heating pump, there’s a good chance the pump is noisy, or a boiler leak has been traced back to blown seals.

This is common on heating pumps where multiple speed settings are available. If they are left on the maximum flow setting when they don’t need to be, the pressure can blow the seals and the boiler will start to leak.

Grundfos UPS2 Pump Review

If you are unsure whether your central heating pump is to blame heating problems, have a quick read of our article on central heating pump problems.

When it comes to older boilers, many are fitted with Wilo pumps. Common examples include the Wilo Gold 50 RS and the 60 RS. Unfortunately, Wilo heating pumps became known for being particularly unreliable.

Nowadays, high quality new boilers are usually fitted with a variant of the Grundfos pump. Many of the Grundfos pumps we replace are 15-20 years old. Even then, sometimes it’s a small issue that has let the pump down, such as the blown seals mentioned above.

Are replacement seals included?

Grundfos provide a set of new seals with each of the new pumps they supply. If seals are the issue; they’ve got you covered.

Suitable applications for the UPS2 15-50/60 pump

Typically, the Grundfos UPS2 range is suitable for small to medium domestic heating systems. Grundfos does offer a range of larger and more technologically advanced pumps for larger more complex heating systems.

The great thing about the UPS2 range is that it’s been rigorously tested, to ensure it meets ErP standards. This means it’s extremely energy efficient.

If you are unsure about the correct heating pump for your system, speak to a Gas Safe engineer at Heating Force. Even if your property is outside of our working range, we’re always happy to advise via email.

Replacement pump, or replacement head?

If the boiler pump simply needs a replacement head, Grundfos offer the UPS2 head as a standalone product. If the pump is over 5 years old, it usually makes sense to replace the whole unit. The Grundfos UPS2 15-50/60 can be purchased for less than £100.

Understanding heating pump speed settings

Grundfos incorporate the ability to quickly adjust speed settings on their pumps. Naturally, the lowest setting (1), is the most energy efficient. The highest (3) will provide the largest flow rate, but will use more energy (and put more pressure on the pump).

Smaller properties with less than 10 radiators, or central heating systems using microbore pipe (8mm and 10mm copper) will usually get away with running their pump on setting 1.

In fact, any higher than this, and it’s likely back pressure will be created which can blow the pump. We’ve seen pumps as young as 6 months old blow their seals, simply because the wrong pressure setting was selected on the pump.

The 2 faster flow rates allow those with larger properties (and larger runs of copper pipe) to ensure their radiators get up to heat quickly. Not only this, but they get up to full temperature. As water moves around pipework, it will lose temperature. It might go out of the “flow” side of the boiler hot, but come back via the “return” Luke-warm at best, if the wrong flow rate is selected.

Always speak to an engineer to decide what the best flow rate is for your boiler pump.

UPS2 15-50/60 pump features

One of the best features incorporated into the UPS2 is the vent screw. This allows users to quickly bleed air out of a system. Air in a heating system can cause all kinds of problems, including radiators not getting hot, towel rails not functioning and in the very worst cases; boilers locking out.

Alongside the bleed screw, Grundfos have attached a 5-year warranty to their UPS2. It’s unlikely that anything will go wrong in such a short period of time, but even so, a replacement is ready and waiting.

UPS2 Heating Pump: VERDICT

Where the UPS2 15-50/60 is the correct heating pump for a boiler, we always recommend using it. Although they are a leading brand, they are not particularly expensive. And, the warranty is good at 5-years

The fact many faulty pumps we remove are over 15 years old is really a testament to the quality of the Grundfos brand.

Where to Get Cheap Grundfos Pumps?

If looking for cheap UPS2 15-50/60 pumps online, Amazon is a great place to start.

Check price on Amazon

However, if you have a local independent plumbing merchants locally, it’s worth checking out.

At time of writing, a replacement pump should be less than £100, although prices do change regularly.

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  1. I have replaced grundfos UPS 15-50 with grundfos UPS2 15-50/ 60 new pump keeps air locking old pump over 20 years old never air locked flushed system to remove sludge still air locks every 2 or 3 days is it possible new pump can be faulty

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