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Joined: Jun 2007
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Ambassador Field Correspondent Hall of Fame  Lunker
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Ambassador Field Correspondent Hall of Fame Lunker
Joined: Jun 2007
Posts: 7,099 Likes: 23 |
The membrane diffusers don't need a check valve. The membrane has thousands of laser cut slits that open when pressure is applied by making the rubber "dome" out and spreading open the slits. When pressure is relieved, the rubber membrane flattens back out and self-seals. IIRC, Vortex diffuser slits are .5mm size whereas most others are 1mm in size. The smaller bubbles will move more water as they rise.
Last edited by Rainman; 06/14/09 11:46 AM.
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