Float switch or controller ยท Sump Alarm

Water Boss 2359 Float Switch (Sump Alarm)

A tethered float with a 13 A rating

Updated October 2026

Quick verdict

A strong value float switch.

Strength
Higher rating and long warranty.
Trade-off
Tethered only.
Right buyer
Sump, septic and tank control.
Voltage
120 V
Power source
ac/dc
Dimensions (seller)
3.25"L x 1.5"W x 6.5"H
Product weight
1.2 lb
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Why it matters

The 2359 uses a Honeywell microswitch rated up to 13 A or 1/2 HP, higher than many universal floats. The float is IP68-rated polypropylene and works from 32 to 140 F.

A 10 ft PVC-jacketed cable lets you set the tether length, and it carries a five-year warranty.

Who it's for, and who should skip it

Good fit if

  • Pumps up to 1/2 HP
  • Septic and tank control
  • Long-warranty buyers

Look elsewhere if

  • Narrow pits
  • Pumps over 13 A

Pros and cons

Pros

  • 13 A rating
  • Five-year warranty
  • IP68 float

Cons

  • Needs room to swing
  • Wiring varies by pump
  • Tether must be set carefully

Limitations to weigh

  • Check the switch's amp and horsepower rating against your pump's nameplate before plugging it in.
  • Check your pit diameter against the switch: vertical floats fit narrow pits, tethered floats need room to swing.

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)3.25"L x 1.5"W x 6.5"HRetailer
Product weight1.2 lbRetailer
Voltage120 VRetailer
Model number2359-3Retailer

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Final verdict

A high-rated float with an unusually long warranty.

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's the 2359's rating?
13 A or 1/2 HP, per the listing.
How long is the warranty?
Five years against defects.