Self-testing backup sump pumps compatible with sealed batteries?

Discussion in 'Pumps and Tanks Well Forum & Blog' started by wwtma, Dec 28, 2008.

  1. wwtma

    wwtma New Member

    Dec 27, 2008
    Sorry for the repeated questions -- I'm clearly very new to this :confused:...

    In looking at the Basement Watchdog BW4000 (1/2 hp combo) manual, I noticed that they say explicitly not to use a sealed deep cycle battery. Knowing where the unit will be located (not to mention how good we are at maintenance kinds of things), I'd much prefer to be able to use a sealed (marine) deep cycle battery. Does anyone know what would happen with this system if we did that? (The FAQ only mentions that the older units would sound an alarm.)

    Failing that, are there any other backup units out there that would be compatible with sealed batteries? Little Giant seems to be ok -- any thoughts on those? Though they don't seem to have a unit that self-tests every so often...

  2. Redwood

    Redwood Master Plumber

    Dec 15, 2007
    Service Plumber
    I'm a Zoeller Fan Myself.
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  4. carmel corn

    carmel corn New Member

    Oct 14, 2005
    Bear in mind that Basement Watchdog conveniently makes their own line of backup batteries for sump pumps. Other reliable brands like Zoeller do as well, but Zoeller will also indicate usage of sealed AGM batteries as acceptable.

    Other backup mechanisms like SUMPRO used to recommend 2 AGM batteries in their units.

    IMHO - Basement Watchdog just wants you to buy their batteries.
  5. SewerRatz

    SewerRatz Illinois Licensed Plumber

    Nov 20, 2008
    Chicago Illinois Licensed Plumber
    Chicago, IL
    Basement watchdog in their instructions do say you can use maintenance free batteries you just have to take the fluid sensor and attach it to the positive side of the battery.
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