On 15 Jul 2006 05:47:49 -0700, "Cam" wrote:

The water returns via 1 1/2 inch hose, the waterfall is fed by a
separate pump.

I don't have the ability to increase the size of the opening without
rebuildind the filter and replacing the hose. I tried jamming a piece
of filter material into the opening and the noise disappeared! the
water level in the barrell rose a little but now it all runs
silent.Thanks for the ideas.

A rebuild might be easier than keeping the filter material clean to
prevent the barrel overflowing. My water runs clear at this time,
but still clogs my finer filter material about once a week, and I'm
not dealing with 1 1/2" diameter, more like 20x20 filter with a flow
of 1200 gph.

Regards,

Hal