Instructables

Step 5: The bell siphon

i cant tell you exactly how long to cut the cap bottle but you do need some room above the inlet for the water to start the siphon.
 
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did you make cuts to the the bottle. Because I can see you made triangular cuts and also did you glue it the funnel section?
slamfist (author)  TraderinNSW493 years ago
the upside down bottle has triangle cuts in it to allow water to flow, and no they are not glued.. it just slides over top for easy cleaning and adjustment