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Old 11-13-2014, 02:19 PM   #1
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Join Date: Jan 2011
Location: england
Posts: 147
Overflow and sump questions

So I have been building my tank for the last year when I get time after work. I finally done a test run today and everything works good with my overflow and return, I was a bit worried about pipe sizes but all seems ok atm.

The problem I'm having is the noise factor. I drilled a hole in the end cap of my diy overflow and that's working great, it's the noise from the bulk head down the pipe into the sump.

I'm using a filter sock and the pipe is at least 4 inches below the waterline.

Pipe sizes:
Return- 1" hose into 1/2 overflow pipe as you can see in the picture.

Overflow standpipe is 1"1/4 all the way down into the sump.

It's the sound of crashing water as it comes down the overflow pipe. Would putting some 90 degree bends slow the flow and stop the noise?

I am using a 3500l/ph pump.
My overall volume is around 380l(100 US gal)

So I should be pumping 2500l ( 680 USgal) per hour turnover. I have read so many posts but with no luck


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