In the event of an inlet pipe comming free - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 04-02-2005, 12:35 AM Thread Starter
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In the event of an inlet pipe comming free

drill a small hole in the intake pipe about 40mm down. that way if your pumps empty the tank all over the floor, itll airlock once it reaches the hole do it to close to the surface and youll get a little whirlpool from the surface which will do the same thing when you dont want it to, if your super paranoid, make a little baffel above it to clip onto the intake pipe and that will stop any air 'twisting' in. that way you can get away with taking the hole higher.
this could save a big disaster from happening, picture half your 55 or 75 on the floor, i have a 2foot deep and my ehiem inlet pipe reaches halfway down.. well you do the math on what would be on the floor and not in the tank. im sure any filter running for to long with no water will die. but thats what RCD's are for right..
just thought ide share that.
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post #2 of 4 (permalink) Old 04-02-2005, 07:45 PM
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Not only a good idea, but mandatory for sumps. If the pump stops the return will back siphon until it hits the small hole right at or below the water level. Cheaper and less parts that a check valve...

Moved to Tucson.
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post #3 of 4 (permalink) Old 04-02-2005, 11:32 PM
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This is an excellent idea. I've just installed a sump on one of my tanks, and was tackling this issue from the wrong angle. I've been raising the outlet bar so that the main tank couldn't siphon more than a few gallons. Consequently, I have to leave a few gallons of space in the lower tank. A couple holes in the outlet is a muuuuch easier way to skin this cat.

Nice posts guys.

Ted


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post #4 of 4 (permalink) Old 04-03-2005, 05:12 AM
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unirdna:

To set the max and min water levels... Turn pump off and fill sump to maximum (I run mine ~2-5 inches off the rim) and make a mark. Now turn pump on and go away until overflow is stable. Make a mark and do not go over this mark if the pump is going... I get ~1/2" to 1" rise in my sump.

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