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Grundfos UPS2 15-50/60 Pump Head Product Code: 34903

Replacement Pump Head for Grunfos UPS2 Central Heating Pump (Code 42635).


  • 3 Speed Settings
  • ErP Compliant
  • 5 Year Manufacturer's Guarantee
  • 6m Max. Delivery Head
  • Q Max. Flow Volume
  • IP44
  • 3 Speed Settings
  • ErP Compliant


240V. 50/60Hz. Port to port distance: 130mm. Temperature range: 2 to 95°C. Weight: 1.8kg.
Additional Information
Technical Specification
  • Brand : Grundfos
  • Product Type : Pump Head
  • IP Rating : IP44
  • Central Heating Pump Product Type : Domestic Pumps
  • Total Product Weight : 1.8 kg
  • Temperature Range : 2 to 95 °C
  • Pack Size : 1
  • Power Voltage Supply : 240 V
  • Manufacturer Guarantee : 5 Year Manufacturer's Guarantee (T&Cs Apply)
  • Pieces in Pack/Case : 1
  • Max Pump Head Size : 6 m
Product Contents
Delivery & Returns


Standard delivery: €15

Free delivery on all orders over €70.00

Click here to see information on our delivery charges and times



Hopefully you won't need to return an item, however, if you do, it is our aim to make this as simple as possible. By following the guidance below you can help us to help you when a product is not what you expected, or is faulty. Your statutory rights are not affected by this guidance.


Click here to see information on returns and cancellation

€114.95 Incl. 20% VAT

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Grundfos UPS2 15-50/60 Pump Head is rated 4.5 out of 5 by 15.
Rated 4 out of 5 by from feels ok replaced a failing Wilo pump. like the 5 year warranty. don't like the price drop a couple of days after I bought it. Like the easy fit electrical connection, i.e. remove the clip connector instead of having to have mirco fingers with mega strength. rubber seals essential, as old ones are invariably wrecked.
Date published: 2018-12-09
Rated 5 out of 5 by from pump Easy to install, just stop the water flow undo 4 nuts swap pump over wire in the lead turn back on Easy
Date published: 2018-11-22
Rated 4 out of 5 by from Grundfos Pump Head In a bit of a tight situation or the valves look a bit dodgy and don`t want to upset the customer with a bigger job or don`t have valves in your van just fit a new head to the pump. It fits perfect with no leaking and the system was up and running quickly.
Date published: 2018-03-21
Rated 5 out of 5 by from Grundfos 15/60 Pump Head Swapped this new one with the old one. Very simple to do. Just remember to isolate the water flow before you take the old pump off. Very quiet now so the old pump needed replacing.
Date published: 2017-11-03
Rated 1 out of 5 by from Good but no good! Bought this pump head to replace the pump in a Baxi DuoTec Combi, The Grundfos site assured me that the pump is a direct replacement for the original. It's not. Pump can be fitted but the terminal block is bigger that original, so body has to be rotated 90 degrees, no real problem. Trouble starts shortly after you've left the premises, error codes start appearing on the boiler, which locks out. Found out afterwards it's a common problem. Fortunately was able to free the original pump shaft to get running again... Despite Grundfos' claims, this pump is not fully compatible with earlier models. Will doubtless work fine when driven directly from the mains, but not when controlled by some PCBs.
Date published: 2017-09-17
Rated 5 out of 5 by from Very good service The pump replaced a similar model that has worked well over the last 10 years or so. The old pump became noisy and whilst the upstairs radiators were fine, the downstairs ones were well below par. The new pump has cured everything - all the radiators are fine and the new pump is very quiet indeed. I changed it myself easily and being able to just change the pump head without disturbing the main plumbing connections made the change easy (though the gate valves either side of the pump didn't seal well so I had to do a partial system drain). The Click and Collect worked well and I appreciated being able to do this on a Sunday.
Date published: 2017-02-21
Rated 5 out of 5 by from Done the job At to replace pump on oil boiler as boiler kept overheating replace with the new pump boiler working fine now
Date published: 2017-01-21
Rated 5 out of 5 by from Good direct and quick replacem Our heating had not been good for some time-upstairs rads ok, downstairs hopeless. Typical of a failing pump. I added to this by descaling the system! Although the old pump seemed ok, this new pump has transformed the performance. Very easy to swap. 20 min job. Like the old pump, has 3 constant speed settings but is also capable of running according to demand if you wanted. Very happy and good not to have to buy the whole assembly.
Date published: 2016-12-13
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