Back siphoning

Discussion in 'Beginner Discussions' started by Pbland, 16 Apr 2018.

  1. Pbland

    Pbland

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    Hi Guys, Can anyone tell me where I can get a inline non-return value for my return pump. As my return pump back siphons from the tank when the power trips or during a power failure.
     
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  3. hotdog83

    hotdog83 Clone Fish Moderator

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    You can drill a little hole just below the water’s surface on your return pump’s pipe where it goes into the display that should break the siphon. The non-return valves normally works with a metal spring (which rusts), or a little pvc ball (which doesn’t seal properly eventually due to stuff growing around it eventually), so safest bet is to not use a non-return valve.
     
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  4. RiaanP

    RiaanP Moderator

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    Non return valve will fail when the first small snail wonders down the pipe.

    Rather drill a hole at the water level. Will suck in air as soon as return pump stops.
     

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