Hot Water Recirc Pump - Noise

[richo106]

Hi All

 

I have a hot water cylinder with a hot water recirc pump, this pump has been working perfectly but last week I noticed it is noisy when it runs now. I think it maybe air in the system (no idea how it got in there) On the video when I close the valve on the return leg the pump noise goes and runs smooth

 

does this point to air in the hot water system? 
 

What is the best way to get rid of the air? 
 

Any advice or information greatly appreciated on this.

 

Many Thanks

[Nickfromwales]

27 minutes ago, richo106 said:

Hi All

 

I have a hot water cylinder with a hot water recirc pump, this pump has been working perfectly but last week I noticed it is noisy when it runs now. I think it maybe air in the system (no idea how it got in there) On the video when I close the valve on the return leg the pump noise goes and runs smooth

 

does this point to air in the hot water system? 
 

What is the best way to get rid of the air? 
 

Any advice or information greatly appreciated on this.

 

Many Thanks

IMG_9261.mov

Where is the non return valve? They're the cause of this noise if they start to go U/S.