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  #1  
Old 01-10-2012, 05:40 PM
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float switches can be more reliable as they offer redundancy. For instance you can wire up as many switches in series as you want with each switch slightly higher than the next so if one were to fail the next one will take over. You can also wire in a timer to not only control when the top off activates but also control how long it's allowed to activate for. However such features are more critical when a larger or unlimited source of water is used for top off. If it's a small container that can't physically add enough water to cause damage a simple mechanical float is all you need, provided it can gravity fed. If you need a pump then you'll obviously be better off with a float switch.
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Old 01-10-2012, 05:50 PM
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well my plan is to put it inside mystand above my sump, and have it drain into the sump when needed
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Old 01-10-2012, 07:52 PM
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I don't think I'd ever risk it. What if the seal on the bucket or on the valve fails? The whole thing will drain into the sump.


An ATO is relatively cheap. Why even bother with this?

I use this ATO and it works amazing. And it's only 75 bucks

http://www.avastmarine.com/ssc/do/pr...ng/Top-off-Kit

Last edited by MarkoD; 01-10-2012 at 07:55 PM.
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Old 01-10-2012, 07:59 PM
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I realize that thats why I'm asking I know there is a risk, but I'm sure that a ATO could fail overtime. it is def. safer then DIY, but I thought I'd put the idea out there ya know?
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