Float switch or controller · Basement Watchdog

Basement Watchdog BWC1 Dual Float Switch

A dual-float failsafe for any sump pump

Updated October 2026

Quick verdict

A smart upgrade over a single float.

Strength
Second float as a failsafe.
Trade-off
Takes more space in the pit.
Right buyer
Owners worried about float failure.
Power source
Corded Electric
Dimensions (seller)
2.13"L x 2.13"W x 6.82"H
Product weight
1.2 lb
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Why it matters

The BWC1 has two floats: if the first fails to start the pump, the second does. The large floats react to a 1/4 in rise, and a protective cage keeps debris and wires from jamming them.

After the water drops, it runs the pump for an extra 10 seconds to empty more of the pit. It replaces piggyback switches on most sump pumps and carries a two-year warranty.

Who it's for, and who should skip it

Good fit if

  • Owners who've had a float fail
  • Busy pits
  • Most piggyback-ready pumps

Look elsewhere if

  • Very narrow pits
  • Sewage basins

Pros and cons

Pros

  • Failsafe second float
  • Debris cage
  • 10-second run-on

Cons

  • Bulkier than one float
  • Plastic body
  • Check pump compatibility

Limitations to weigh

  • Check the switch's amp and horsepower rating against your pump's nameplate before plugging it in.
  • Piggyback switches plug into the outlet and the pump plugs into them; set the pump's own switch to manual or remove it, per the pump maker.

Specifications

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

MaterialPlasticRetailer
Dimensions (seller)2.13"L x 2.13"W x 6.82"HRetailer
Product weight1.2 lbRetailer
Model numberBWC1Retailer
Warranty2 Year WarrantyRetailer

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Final verdict

Worth it to take float failure off the table.

Where to buy

Our links open this exact model's product page. Prices and stock change; check what's included before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

What does the second float do?
It starts the pump if the first float fails.
Why the 10-second run-on?
To pump out extra water after the floats drop.