“New Model” GRUNDFOS UPS3 15-50/65 Pump - Replaces UPS2 15-50/60

When the pump arrived and I took it out of the box I looked at sceptically because it’s so much lighter than the pump it’s replacing. Easily transferred into the isolated system fitted exactly where the 26-year-old pump came from. The initial start-up was a bit noisy due to a bit of air in the system but the pump self vented after that it was whispered quiet fantastic

This was cheaper than getting the older model that looked identical to my old pump. I asked the central heating engineer if the old ones were better because I'd found that they seemed to be more expensive when I was looking. He said the new ones (from the same manufacturer, Grundfos) are just as good and cheaper.He believed that people were probably nervous not to but the wrong thing so would either ask for the older model to match the identical broken old one in place, or maybe their heating engineer might be taking advantage to get rid of an old model they still had on their shelves - and possibly charge extra for it.Anyway, I saved money and that was reassuring to hear so I just hope it lasts as well as the old one did! It seems in his experience with his customers over recent years I've nothing to fear.A few weeks in place now, working well supplying a 5 bed house and no problems with the pressure - radiators are quick to warm up. Very happy.Update after 2 years: [Apr 2025 now] still working well. Had no issues at all.

Quality looking pump with seals and power adaptor from the box. Very efficient and quiet, great value.

Arrived very promptly and before the estimated delivery date. It slotted in where the old model was removed from. Its very quiet although it did have some noise after a few days which was worrying but may have been air in the system - sounded very different to the other pump when some air reached the pump. All quiet and working fine for a few weeks now

Great product. Would highly recommend

Excellent pump and a marked improvement over my old Grundfos unit. Why ? ..does not need bleeding, more compact, plug in electric connection, virtually silent in operation. Plus there are loads of different operating modes to select. I just went with the default. Note that the pump flow is in the opposite direction to my old pump but after unscrewing the four allen bolts it's a simple rotation of the head if you are not happy with the panel being upside down. Worth exploring the full operating instructions online as the supplied quick start guide is basic and a tad cryptic. Easy diy provided you are able to isolate water valves either side of the pump. Also ensure you isolate electrics too. Call a professional if in doubt.

This pump is a replacement for my central heating system, the old pump failed due to the water level dropping (a failed cistern ball valve) which resulted in the pump running dry. That destroyed its bearings! This new pump is a little taller than the old one and because it was positioned beneath boards in the loft meant some more headroom was required. Not a big issue - and not the fault of the pump. This pump runs so quiet I couldn't hear it! I had to put my hand on it to feel the faint vibration to be sure it was running. Installation was very simple - about the same as fitting a domestic plug. Hope it lasts as long as my old pump, I have no reason to suspect otherwise as it appears to be well made.

Great