grundfos alpha 2 L15-60 130 noise

[wooster]

Hi all

Have had the above pump in the house for 5+ years and it has worked really well. Just recently though it has started making a "knocking" noise when set to III (which it always has been). If I turn it down to II then it goes away - video attached

Any thoughts or suggestions on what to do? Is it on its way out?

Thanks in advance

 

[John.g]

Short of changing it, you might try it on CP2, 4th LED on the right, this should give you ~ 85% of the flowrate at full speed and noise might go away.

 

[wooster]

Short of changing it, you might try it on CP2, 4th LED on the right, this should give you ~ 85% of the flowrate at full speed and noise might go away.

Thanks John

Will give that a try and come back to you

Does sound like it could be on its way out!

Cheers

 

[wooster]

Short of changing it, you might try it on CP2, 4th LED on the right, this should give you ~ 85% of the flowrate at full speed and noise might go away.

It was quiet for a while on the 4th setting but now it's rattling again! I guess I will have it swapped out. I see this one is discontinued. Do you have a recommendation for a replacement? Thanks in advance

 

[John.g]

You could install a Wilo Yonos Pico 25/1-6-130 like mine which is heading for 7 years old now or go for the same again.

 

[John.g]

You could install a Wilo Yonos Pico 25/1-6-130 like mine which is heading for 7 years old now or go for the same again.

Should also have mentioned a 6M Dab Evosta 3.