Grundfos mk2 centrall heating pump

[Lee Hutton]

Hi all,I have a central heating system with a pump that's started making a loud vibration noise every so often,the pump speed was on 2 and iv turned it up to 3 .in doing that the pump still makes the noise from time to time ,but the heating is alot warmer.I'm thinking I will need to change the pump ,but on looking at new pump I can't seem to get the same model?.is there a compatible pump for the old one on there.It's a Grundfos mk11 type ups 15-50x18 model no u544.240 v. 50hz. 2.5 Hf. Class f.And that's all the information on the side of the pump.Hope someone can help .Thanks for reading.

 

[Howsie]

The new pumps are now 'energy efficient'. You can find your replacement here: http://uk.grundfos.com/products/fin...d/file/file.res/ALPHA2 Sales Leaflet 0413.pdf

 

[townfanjon]

'energy efficient'. [/url]

Love those 2 words, NOT lol . What a nightmare these 'energy efficient ' lol pumps are turning out to be !!!
Please Mr Stafford , sort us out some of the old ones