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Autosiphon (Bell Siphon) KIT

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The king of Media Bed water-outlet controllers! The auto siphon (bell siphon) controls the flood-and-drain cycle of your media beds. An easy, trouble-free way to keep your beds running smoothly. The outer casing has a secure screw top. . . . read more

Selected Size/Selection: One Size

One Size
$99.90 (AUD)



Product Details

The Autosiphon - an essential part of every media bed!

How does it work?  A constant in-flow of water gradually fills the bed.  The holes in the outer cover and the bell let water into the autosiphon.  Once it reaches the depth of the upstand inside the autosiphon, the water starts flowing down through the upstand and out of the bed.  This creates the siphon effect under the bell, which keeps drawing water out of the bed.  Once the water level in the bed gets low, air enters the holes in the bottom of the bell, which 'breaks' the siphon effect - the water stops draining out of the bed, and the bed starts filling again.

Works reliably all on its own.  No need for timers.  No need for manual release valves to drain the bed.  Just set up the autosiphon and it will run itself - time after time after time!

With no moving parts, it is very easy to set up and maintain. Once properly balanced with the incoming water flow, it requires very little maintenance - just a bit of a clean now and then, and a check for roots or media getting in to it.  A reliable piece of equipment that will serve you well for years.

The Practical Aquaponics autosiphon kit comes with all the parts and instructions you need to assemble and install your autosiphon:

  • outlet fittings & pipe
  • pre-assembled upstand
  • pre-assembled bell
  • pre-assembled outer casing - vital for keeping media from clogging the siphon
  • The outer casing (stone guard) has a secure screw top. Keep stones, frogs and the like out of the assembly.

The screw-top lid on the outer casing protects the siphon from material falling down into it and causing problems.  It also makes it very easy to check inside, or to reach in and unscrew the upstand for maintenance.  Such easy access makes it a breeze to keep your autosiphon in good working order.

This is the original and still the best autosiphon. Thousands have been sold and are operating flawlessly.

You might also find an autosiphon called any of the following:

  • auto siphon
  • autosyphon
  • auto syphon
  • bell siphon
  • bell syphon

Whatever you call it, you need it!  Run your media beds easily and reliably with this no-fuss water-outlet control.

Additional Information


Murray Hallam is probably the best-known face in the world-wide Aquaponics movement. Murray is by nature an innovator and in his Research & Development facility has perfected many new methodologies for commercial farm Aquaponic systems.


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Autosiphon (bell Siphon) Kit

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