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Thread: Flow sensor Questions

  1. #1
    Regular Vistor
    Join Date
    Feb 2018
    Location
    Louisiana
    Posts
    30

    Flow sensor Questions

    Hello

    I’m currently resetting up my tank with new plumbing and want to set up the fmm with flow sensors. I run 3/4” return with a herbie overflow. 1” drain line and 1” emergency line.

    The fmm kit comes with (2) 1/2” flow sensors for my carbon and gfo reactor. And (1) 1” that I’m assuming will go on my 3/4” return. Am I right since they don’t make a 3/4” sensor?

    I want a flow sensor on my emergency drain so it can warn me if something is wrong. Can I do this? Will there be enough flow in my emergency line to activate the flow sensor?

    Thanks


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  2. #2
    Frequent Contributor zombie's Avatar
    Join Date
    Dec 2013
    Location
    Denver, CO
    Posts
    13,176
    The 1" would go on your return. Use reducers to connect to 3/4 plumbing.

    I would not suggest using a flow sensor on your emergency drain. You are better off mounting an optical or float to detect when the water level is just below where the emergency drain can drain.

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  3. #3
    Regular Vistor
    Join Date
    Feb 2018
    Location
    Louisiana
    Posts
    30
    Ok. Thanks



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