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Basement Watchdog Big Combination Sump Pump System

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Basement Watchdog Big Combination Sump Pump System


  • Pump system
  • Package contains: Controller, charger, two dual micro reed float switches, primary pump and backup pump, instruction manual (battery and acid sold separately)
  • Offers two combination sump pump systems designed to provide both primary and battery backup pump capabilities
  • Primary pump will operate as long as it is receiving AC power
  • Power is interrupted, or if more water is coming into the sump than the AC pump can handle, the backup sump pump will begin pumping automatically
  • Backup system has unique monitoring features that diagnose a problem and sound an alarm
  • Light on the display panel of the control unit will indicate the cause of the alarm and the corrective action
  • Two systems have been pre-assembled for easy installation
  • Compact, fits in pits as small as 12'' in diameter
  • Dual float switches for added protection
  • Primary float switch has a protective cage
  • Primary system pumping capacity: 4400 GPH @ 0' or 3200 GPH @ 10'
  • User-friendly controller sounds an alarm, illuminates a warning light and describes what to do for easy maintenance
  • Ability to communicate with an auto dialer, home security system or other device to alert you to problems or required maintenance
  • System runs the backup pump once per week to ensure proper operation
  • Power supply requirements: 115 volts AC
  • 2-Year warranty
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Product Details:

  • Amperage: 4.2 Amps
  • Frequency: 60 Hertz
  • Flow Rate: 4400 Gallons per Minute (GPM)
  • Submersible: Yes
  • Product Warranty: 2 Years
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  • Overall: 18" H x 11" W x 8.75" D
  • Cord Length: 120"
  • Inlet Diameter: 1.5"
  • Outlet Diameter: 1.5"
  • Overall Product Weight: 18.2lbs
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Basement Watchdog Big Combination Sump Pump System

Additional Documents

Installation and Assembly

Weights & Dimensions

  • Overall: 18" H x 11" W x 8.75" D
  • Cord Length: 120"
  • Inlet Diameter: 1.5"
  • Outlet Diameter: 1.5"
  • Overall Product Weight: 18.2lbs


Product Type: Sump PumpFinish: Grey
Hardware Finish: Stainless SteelMaterial: Aluminum; Cast iron
Hardware Material: Stainless steelMaterial Casing: Cast iron; Aluminum
Material Shaft: Stainless steelImpeller Materials: Polymer
Number of Items Included: 11Pieces Included: Primary and battery backup pump, primary and battery backup controller/monitor, backup charger, primary dual float switch with protective cage, backup dual float switch, battery box, battery cap with hole, wire ties, instruction manual
Corrosion Resistant: YesLeakproof: Yes
Rust Resistant: YesControl Box Required: Yes
  • Control Box Included: Yes
Hose Included: NoCastors Included: No
Usage: BasementPower Source: Electric; Battery
Combination Pump: YesAmperage: 4.2 Amps
Frequency: 60 HertzVoltage: 115 Volts (V)
Flow Rate: 4400 Gallons per Minute (GPM)Shredder Impeller: No
Submersible: YesMax Head Height: 25 Feet
Switch Type: Reed switchMaximum Fluid Temperature: 104 Fahrenheit
Auto Shut Off: Yes
  • Overheat Shutdown: Yes
Suction Strainer Included: Yes
Threaded Inlet: YesThreaded Outlet: Yes
Battery Operated: Yes
  • Battery Included: No
  • Battery Charger Included: Yes
Permanent Lubrication: Yes
Power Cord: YesHandles: Yes
Commercial Use: NoCountry of Manufacture: China


Product Warranty: 2 Years 


UL Listed: YescUL Listed: Yes

About the Manufacturer

The Basement Watchdog brand of battery backup and primary sump pumps are available through most hardware or home improvement retailers. The Basement Watchdog systems monitor the pump, power and battery conditions and alert when maintenance is needed. Basement Watchdog systems give you the piece of mind that your basement will remain dry.

Basement Watchdog Big Combination Sump Pump System

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When you buy a Basement Watchdog Big Combination Sump Pump System online from Wayfair, we make it as easy as possible for you to find out when your product will be delivered. You can check on a delivery estimate for the Basement Watchdog Part #: BW4000 here. If you have any questions about your purchase or any other Water Pumps product for sale our customer service representatives are available to help.Whether you just want to buy a Basement Watchdog Big Combination Sump Pump System or shop for your entire home, Wayfair has a zillion things home.
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Customer Reviews

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Tell us what you think about the Big Combination Sump Pump System. It will help us provide you with better products in the future and help your fellow Wayfair shoppers make better purchases.

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Average Overall Rating
(based on 18 reviews)

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Great value

Jay from Belle River, ON– Verified Buyer

I did quite a bit of research when making our pump purchase. We replaced a previous pump that had failed in a high water situation in our basement of the house we had just purchased.
As it turns out our sump pit is active at all times and I watched this pump save our basement on more than one occasion where I am sure the previous one would have failed. The alarm is invaluable at notifying you of battery power or other failures.
I liked it so much this is actually my second one which I purchased to have as a backup of the backup - yes it sounds like paranoia but once your basement has flooded you don't want it happen again!
I would recommend this pump system to anyone who wants a reliable main and backup pump that will most likely be more then needed.

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Good Pump

mark from MN– Verified Buyer

Great pump, nice having the security of the battery backup. I am not using the bw battery because of the many negative reviews I found about longevity. Instead I bought a standard deep cycle marine battery and have been using that with no problems. The charging system works just fine, and the battery powers the backup pump.

The main pump is great, very powerful, clears the pit in a matter of seconds. I don't anticipate running into any problems it seems to be built very well.

Again for those of you looking at buying this combination, I suggest that you do not buy the BW battery, instead go find a good deep cycle marine battery. ( Usually you can find them for less than the BW battery) I paid 89$ for my battery.

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Best Sump Pump Period!

Vince from Staten Island, NY– Verified Buyer

Easy to install and simple to set up. Very reliable

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Excellent Buy

Dave from St Albert, AB– Verified Buyer

Excellent set-up, easy to install. I wish the package included the battery.

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Works really good

Doug from South Carolina

It works really good and is very easy to install. The only thing that I found the battery that they suggest isn't necessary. You can really use any battery. I am very satisfied with the system.

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Works well!

Marc R from College Park, MD– Verified Buyer

After doing extensive research, this is the best application of a 2-in 1 sump pump I have found, especially if you have a tight space.
I connected it to the Basement Watchdog 7.5 hour battery in spite of the bad reviews it has. I conntacted the manufacterer, Glentronics, who claim any other battery will give error messages on the control panel. Time will tell how this battery holds up.

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Richard from Niagara Falls, NY– Verified Buyer

This is a must have combo. Great quality and easy to install. Just had to buy a battery and was in business. Will buy another when I move.

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Easy installation

Carl Atwell from Glen Burnie, MD– Verified Buyer

Installation was easy. The pump has functioned through tests. I went with a deep cycle marine battery instead of the basement watchdog battery after reading many negative reviews about the OEM battery.

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Easy installation even for me !!

rockwell from Latham,N.Y.

I'm glad I upgraded to this model. Installation was simple and it runs very well.
The backup pump is very powerful and I have no worries that this system will take cate of business when the power goes out again. Peace of mind is worth it's weight in gold

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My sump is Consistantly pumped!

Operating Engineer NYC Local 30 from Westfield NJ– Verified Buyer

I seen same pumps sold at the [...]. The online price is much better. [...]. The install was easy. I am now purchasing the battery and the acid seperatly.For this pump you need to have a 120V outlet nearby. And you need to have some skill in assembling PVC piping. Great buy. Great pump. Easy install.

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