Grundfos Central Heating Pump Weak?

[dilligaf]

Do central heating pumps lose their strength over several years and is it worth taking it apart and servicing it?
Are the two seals either end 1 1/2 inch or 1 1/3 inch?

What's the latest central heating pump should I need to replace mine (photo) like for like?

 

[king of pipes]

Yes they do the performance drops off after a good few years , better to replace it for a more modern low energy pump Dab evosta are a decent replacement. Kop

 

[dilligaf]

Yes they do the performance drops off after a good few years , better to replace it for a more modern low energy pump Dab evosta are a decent replacement. Kop

Thanks, which one of those would be equivalent to the one I have? You're not a fan of Grundfos then?

 

[king of pipes]

No I'm not a big fan mate your old pump is not energy efficient the new Grundfoss pump are quite a bit more expensive and in my opinion Dab are just as good . Kop

 

[dilligaf]

No I'm not a big fan mate your old pump is not energy efficient the new Grundfoss pump are quite a bit more expensive and in my opinion Dab are just as good . Kop

Thanks buddy