Question about pond water siphoning

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  #1  
Old 04-01-07, 10:51 AM
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Question about pond water siphoning

I have a garden 'waterfall' using a pond and pump at ground level. Water gets pumped uphill ( about 24") to 'bowls' that are arranged to empty into each other downhill back to the pond. How can I stop siphoning back to the pond through the supply line after the pump is turned off.
 
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  #2  
Old 04-01-07, 03:15 PM
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Install a check valve in the line from the pump. Probably easiest to do right at the pump but if the lie is flex plastic you can cut it and insert the valve anywhere.
 
  #3  
Old 04-02-07, 05:26 PM
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You just need the ouput end of your hose above the water level of the top bowl. When you turn off the pump the water in the hose drains back but since the top end is above the waterline it sucks air not the water out of the bowl.
 
  #4  
Old 04-02-07, 07:27 PM
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Another option is to do what we do for our aquarium return pipes. Drill a hole about 3/16 inch in the return pipe just below the water level. When the pump goes out and the water falls below the the hole air will replace the water.
 
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