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Originally Posted by billbartuska
Sorry I didn't read this post sooner (I'm not into silent computing). I'll bet what you are hearing is cavitation.
Hook up the pump with a 2 foot loop of 1/2" tubing with just a 1/2" ball valve in the loop. Run the pump and slowly close the valve. If it's cavitation you'll head a sound like the pump is pumping alotta air or, in the worst case BB's. If it is cavitation the only cure is to remove restriction fron your loop....or a less powerful pump.
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But I was under the impression if I had very little restriction I'd get more cavitation. As in cavitation was caused by high velocity/flow? I was under that impression because when the loop is just a T line and a loop of tubing it is VERY loud. Its pretty loud now but with no restriction it is even louder. The more restriction I put on the loop(pinch the tubing) the quiter it got.
And I still havent found a place to buy a replacement head. Does anyone know of any place at all? Please help