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Air pumps and back pressure


Josh

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Hi All

Here is the best way to destroy a Hi-blow 80 in two days. Expesive lesson, first I didnt realise it was my hp80, its been in a box for two years, and then I didnt bleed off enough air. I guess it was due for a rebuild anyways?

Basically blew one diaphragm, striped out two aluminum washes, pulled the safety nut of its thread and chipped one magnet.....not to mention it got real hot!

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I have two of these, I thought both where 40lph pumps :no:. The pump also has a big "HI-BLOW 80" on the top of it too. I was only running 6 sponge filters off it......

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I used to run my whole room off a 40, this was a back-up pump, the 40 is pumping away now and I am bleeding off plenty of air

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