Ball valves or hole drilled to break siphon - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 08-27-2008, 03:47 AM Thread Starter
 
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Ball valves or hole drilled to break siphon

Hi there,

I was wondering whether to use a ball valve or to drill a hole in my return pipes to break the siphon to stop overflows in a power outage.

Regards Darren
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post #2 of 9 (permalink) Old 08-27-2008, 04:59 AM
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Well ball valves have to be turned off... so that wouldn't do anything for you. I assume you meant check valves. If so, I use check valves AND a siphon break hole. The siphon break hole is really mandatory. It is foolish to think your system isn't going to need it.
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post #3 of 9 (permalink) Old 08-30-2008, 10:46 AM Thread Starter
 
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How so foolish? and yes I mean a check valve, I dont know what sizes they come in however.
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post #4 of 9 (permalink) Old 09-09-2008, 04:57 AM
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for years i use a wet dry and i drill a hole about 1/2inch below the water line of my return and never had a problem , and that is all i had and it always stared back up fine when the power came back up too never had a flood
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post #5 of 9 (permalink) Old 09-09-2008, 01:05 PM
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Originally Posted by duzzy View Post
How so foolish? and yes I mean a check valve, I dont know what sizes they come in however.
Check valves fail. So long as you look at the break hole every week to make sure it hasn't clogged(should be on output side to stay clean) then there will never be a problem.
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post #6 of 9 (permalink) Old 09-12-2008, 02:54 PM
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mine never clog due to the pressure of my return pump pumping out and the drilling below the water line is also how much your sump will handle the back flow before the hole breaks the flow,
you don't wanted it to far down on your return line or it will be to much for sump and it over flow before it stops. i say ether 1/8,1/4inch at the most to be on the safe side,
and you also need to know how much water your sump will handle when the power goes out
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post #7 of 9 (permalink) Old 09-27-2008, 11:00 AM
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The break hole in my return pipe is actually above the water line and that works too. You just live with having a tiny stream of water coming out of it.
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post #8 of 9 (permalink) Old 09-27-2008, 06:44 PM
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The break hole in my return pipe is actually above the water line and that works too. You just live with having a tiny stream of water coming out of it.
Sure, y0ou can do that, or you can put it just below the surface and calculate your sump size to accomodate the extra water coming from the tank to that point. Which is the way I would recomend. Adding extra noise to a possibly noisy sump is just silly.
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post #9 of 9 (permalink) Old 09-28-2008, 05:25 AM
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I drilled 3 small holes in the return pipe just barely at surface level... it has saved my ass once when power went out when I wasn't home. When I got home and walked into the house with no a/c my heart sank but the tank was fine on the backup bubbler. Another time though, the return pipe nearly syphoned a large amount of saltwater into my sump because I had algae and snails blocking the holes... luckily I was home that day. Keep a regular eye on the drilled holes being clear of stuff
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