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The Basement Watchdog 1/3 HP 3,500 gph Thermoplastic Dual Reed Switch Battery Backup Sump Pump
The Basement Watchdog 1/3 HP 3,500 gph Thermoplastic Dual Reed Switch Battery Backup Sump Pump
The Basement Watchdog 1/3 HP 3,500 gph Thermoplastic Dual Reed Switch Battery Backup Sump Pump
The Basement Watchdog 1/3 HP 3,500 gph Thermoplastic Dual Reed Switch Battery Backup Sump Pump

The Basement Watchdog 1/3 HP 3,500 gph Thermoplastic Dual Reed Switch Battery Backup Sump Pump

The Basement Watchdog 1/3 HP Thermoplastic Battery Backup Sump Pump is engineered to protect your basement even when the power goes out. With a compact footprint, rugged thermoplas…

The Basement Watchdog MPN BWD12-120C
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This product isn’t sold on our website — see your local hardware store.

Typical Store Price i
Typical store price: low $457.99, average $539.00
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About Product Overview

The Basement Watchdog 1/3 HP Thermoplastic Battery Backup Sump Pump is engineered to protect your basement even when the power goes out. With a compact footprint, rugged thermoplastic housing, and a reliable dual reed switch, this backup unit steps in automatically to keep water out of your living space when you need it most.

  • Horsepower: 1/3 HP for steady, dependable pumping when main power isn’t available
  • Housing material: Durable thermoplastic designed to resist corrosion and stand up to damp sump environments
  • Maximum discharge flow: 3,500 gallons per hour, so you’re prepared for heavy rain and rising basements
  • Power source: Battery-powered, 12-volt operation for outage protection
  • Float switch: Dual reed switch for reliable on/off control across a range of water levels
  • Discharge outlet: 1.5-inch diameter to fit standard hoses and discharge plumbing
  • Intake: Bottom suction reduces debris intake and helps keep the pump primed
  • Dimensions (approx.): 7-1/2 inches high x 9 inches wide x 5 inches deep for a compact fit in most basins
  • Maximum head: Up to 16 feet, with practical performance at common lift heights
  • Discharge flow at 10 ft. head: Approximately 2,200 gph, illustrating strong performance at typical lift levels

Why this backup sump pump stands out

During a storm or power outage, a standard sump pump can fail just when you need it most. This Basement Watchdog model is purpose-built as a dependable battery backup, ensuring your basement remains dry even when the grid goes dark. The thermoplastic body resists the damp, chlorinated environment of a sump pit, while the dual reed switch provides precise, resilient switching that reduces nuisance drains and misfires.

Ideal use scenarios

  • Homes in flood-prone regions where power outages coincide with heavy rainfall
  • Basements with older electrical systems that benefit from a dedicated backup solution
  • Rental properties or seasonal homes where reliable standby pumping is a practical necessity

Practical setup and daily use tips

  • Install in a standard sump basin with the 1.5-inch discharge aligned to your existing plumbing.
  • Keep the backup battery charged and perform a quick function test monthly to confirm operation.
  • Ensure the bottom-suction intake is free of debris to maximize pumping efficiency and reduce clogs.
  • Pair with a compatible primary sump pump to create a robust two-pump protection system for severe weather.

With its combination of reliable 1/3 HP power, 3,500 gph maximum flow, and 12-volt battery operation, this Basement Watchdog backup sump pump offers a practical, proven solution for basement protection. It’s the smart choice for homeowners who want to minimize flood risk, preserve stored valuables, and sleep easier when storms roll in.

The Details Specifications

Brand The Basement Watchdog
SKU 4097234
UPC 717301121203
Unit 0
Case Pack Quantity 1 per case
Retail Unit Quantity 1
Unit of Measure 0 0
Dimensions (L × W × H) 10 × 17 × 23
Weight 31 lbs
Cubic Feet 2.28264 ft³
Country of Origin TAIWAN
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

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