Mightyvac noise

Try using: WD-40 SPECIALIST HIGH PERFORMANCE SILICONE LUBRICANT.

That should last a really long time. So you don't need to keep re-apply it all the time.
 
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I'm using it dry pumping, so not sure what u mean?

I thought you were using it with water. I suggest you take the advice above. I would like to add that, dry pumping can give you same big expansion you get from water pumping but you will have to pump at higher pressure. It took me more than 2 months to discover this.
 
It helped, still some noise but not as bad, thanks
Awesome brother. 👍
Try with ordinary WD-40 also (not: Silicone), it could also help. It will not damaged your pump handle/system. You don't need a lot of it. You can even use it to clean electrical switches.

Maybe there is som metal parts that's grinding somewhat against each other, or some spring that's making a sound.

But you probably know this already. 😊
It's always good to lubricate moving parts.

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