Reducing pump noise

[504Reefer]

Trying to reduce noise coming from an Iwaki 100rlt pump. I put some matting to reduce vibration under the pump, but still is loud since there are 2 openings behind the stand. I know I dont want to restrict air flow in the back of the pump, but any other way I can reduce noise? Anyone used dynamat or one of those pool pump boxes?

 

[mrx66699]

pool pump box will heat it up....make sure its not the pump needing a new seal kit

 

[504Reefer]

so just by noise alone you can tell if it needs a new seal kit?

 

[mrx66699]

yes on an external....and yes there is a difference from a normally louder pump but with the reeflow line they should be almost dead silent and if you listen closely on one that needs a seal kit you can here the shaft making a hum when it should be silent ...I have 2 at the moment same model and you can tell the one that needs a seal kit ...just havent had time to replace it

 

[ravedood]

the bearings could be bad, or the impeller.

 

[Uncle Luke]

Is this a new pump? I've had Iwaki's (Japanese Motor) before that were a bit loud for my taste.