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90mm Back Flow / Check Valve
http://byap.backyardmagazines.com/forum/viewtopic.php?f=8&t=12187
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Author:  4xjbh [ Mar 26th, '12, 10:02 ]
Post subject:  90mm Back Flow / Check Valve

Has anyone in AU seen one of these and if so where from?

Author:  earthbound [ Mar 26th, '12, 10:07 ]
Post subject:  Re: 90mm Back Flow / Check Valve

For what purpose? Generally most check valves I've seen have a heavy duty spring so they take a lot of pressure to open them.

Author:  Food&Fish [ Mar 26th, '12, 14:37 ]
Post subject:  Re: 90mm Back Flow / Check Valve

Would not even think of them just another thing to go wrong

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