Non-return Valve


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Hi all,

I would just like some advice on a non-return valve.

I would like to put a non-return valve on my return pumps line to prevent the sump from flooding in the event of a power/pump failure. I have watched quite a number of videos of guys in the USA using clear non-return valves (they are called True Union Swing Check Valves) as per my image. I can't seem to find any of these available in SA and would like to know if a non-return valve, like the ones used on swimming pools and irrigation, would be a viable substitute?

I was at Waterware in Centurion and the salesperson informed me that non-return value is opened under 1Bar of pressure, would this significantly reduce my flow from my return pump? (I am planning on running a Jebao DCP 4000).

Any information or advice would be greatly appreciated.
 

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Sorry can't help you with the valve. But what I've done is I drilled two small holes into the return pipes. Just below the water level. So if there is a syphon the syphon breaks much quicker. As soon as the water goes below the holes the syphon stops.
 
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Sorry can't help you with the valve. But what I've done is I drilled two small holes into the return pipes. Just below the water level. So if there is a syphon the syphon breaks much quicker. As soon as the water goes below the holes the syphon stops.
That's an excellent idea, thank you so much
 
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I think somwere here on masa there was a discussion about these valves. But if I remember they can fail when a snail or something get stuck in them. Can't remember the whole story.
 
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I think somwere here on masa there was a discussion about these valves. But if I remember they can fail when a snail or something get stuck in them. Can't remember the whole story.
I think I may have found that tread now, but the holes drilled in the piping does seem to work quite well after I tested it yesterday so I think I might just stick with them and leave the non-return valve out.
 
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