I believe they are float switches I'll have to check again.
Quote:
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Originally Posted by bluetang3
The jbjs are not a bad option either. Your still looking at 100 plus you will need the pumps and hosing. The tunze is 190 which is a bit for initial but considering the safeties and the reliability of it thats why i chose it.
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Now that you've said that the cost difference isn't much. I forgot the tunze comes with it's own pump.