Model # BW4000

Internet #202042663

Store SKU #618637

Store SO SKU #1000897548

Basement Watchdog 1/2 HP Big Combination Unit with Special Backup Sump Pump System
0717301121982

Basement Watchdog

1/2 HP Big Combination Unit with Special Backup Sump Pump System

  • Upgraded, dual pump system delivers ultimate protection
  • PSC motor designed for reliable, energy-efficient operation
  • Easy, DIY installation with included instructions
$39800 /each
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Frequently Bought Together

Product Overview

The newly upgraded Basement Watchdog Special is now added the +, with new features that make it an even better solution for preventing basement flooding. This Big Combo+ is a pre-assembled energy efficient 1/2 HP Cast Iron Cast Aluminum primary pump combined with the newly upgraded Basement Watchdog Special+ Battery Backup Sump Pump System. With two pumps in your sump, you will know your basement is protected. Easy to install with little or no plumbing knowledge required. New features include: Weekly self-test of the pump, compatibility with maintenance-free AGM batteries, improved charging and monitoring and a remote terminal for easy connection to a security system, auto dialer or other similar device.

  • 1/2 HP energy efficient permanent split capacitor (PSC) primary pump can save money on your electric bills
  • Primary pump capacity 3,200 GPH at a 10 ft. lift and 4,400 GPH at 0 ft. lift
  • Backup system capacity 1,730 GPH at 10 ft. lift and 2,500 GPH at 0 ft. lift
  • Includes a battery backup system with unique monitoring that sounds an alarm, illuminates a warning light and describes what to do for easy maintenance
  • Runs weekly pump cycles to check for proper pump operation and to exercise the pump
  • Peace of mind when away from home, remote terminal allows the ability to communicate with an auto dialer, home security system or other device, to alert you to problems or required maintenance
  • Dual float switches on both the primary and backup systems provide 4X the protection
  • Provides days of intermittent pumping power on a single battery charge
  • Fluid sensor monitors fluid level of the battery
  • Compatible with both wet cell and maintenance-free AGM batteries
  • Connect 2 batteries in parallel for double the run time
  • Automatic 1.6 Amp battery charger
  • Compact design fits in pits with diameters as small as 12 in.
  • Detailed instructions with over 90 pictures walk you through the simple installation process
  • Free lifetime technical support
  • Includes controller, 1.6 Amp charger, 2 dual float switches, primary pump, backup pump, remote terminal and instruction manual (battery not included - sold separately)
  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Specifications

Dimensions

Maximum Pumping Height (ft.)
30
Product Depth (in.)
8.75
Product Height (in.)
18
Product Width (in.)
11.5
Switch-Off Height (in.)
6.0
Switch-On Height (in.)
6.0

Details

Amperage (amps)
4.2
Batteries Included
No
Battery Back-Up
Yes
Battery Life (hours)
7.5 h
Battery Type Required
Basement Watchdog 7.5 Hour Battery (30HDC140S)
Cord Length (ft.)
10
Discharge Flow @ 0 ft. (gallons/hour)
4400
Discharge Flow @ 10 ft. (gallons/hour)
3200
Discharge Flow @ 15 ft. (gallons/hour)
2100
Horsepower (hp)
1/2 hp
Housing Material
Aluminum
Impeller Material
Engineered Polymer (Primary), ABS (Backup)
Maximum Working Temperature (F)
104
Minimum working temperature (F)
40
Number of Batteries Required
1
Power Type Required
AC
Product Weight (lb.)
18.2lb
Pump Switch Type
Vertical
Returnable
90-Day
Self-Priming
Yes
Submersible
Yes
Sump Pump Outlet Diameter Type
1-1/2 FPT
Voltage (volts)
12

Warranty / Certifications

Certifications and Listings
1-UL Listed,CSA Listed,cUL Listed
Manufacturer Warranty
2 Years

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Customer Questions & Answers

Does the back up pump sit higher than the pimary pump?

Asked by: tzack
yes
Answered by: sludy
Date published: 2017-06-14

If the primary pump fails but the home still has power, will the backup pump use the home power or battery?

Thinking of a case where I might be on vacation and the primary pump fails. If the backup only works on battery then it could be long dead before I return home.
Asked by: Andrew
battery
Answered by: sludy
Date published: 2017-06-14

Do both pumps have check valves so pumped water doesn't flow back into sump pit when motor stops?

Asked by: Andy
(1) check valve at the top to handle both pumps.
Answered by: sludy
Date published: 2017-06-14

Will this pump work in a 5 gallon bucket? That is what the plumber installed (and cemented the 5 ...

Will this pump work in a 5 gallon bucket? That is what the plumber installed (and cemented the 5 gallon bucket to the ground so groundwater will not raise it as that is what caused my recent flooding). It seems to just fit the diameter requirements. What size "sump bucket" would you recommend for this pump?
Asked by: Andy
I think the unit is too tall to work in a 5
Answered by: sludy
Date published: 2017-06-14
  • y_2017, m_7, d_25, h_16CST
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Customer Reviews

1/2 HP Big Combination Unit with Special Backup Sump Pump System is rated 4.1 out of 5 by 87.
Rated 2 out of 5 by from Since this sump pump is brand new I am really commenting on the last Big Dob Combo Unit. I had s... Since this sump pump is brand new I am really commenting on the last Big Dob Combo Unit. I had several issues with it when I bought it around 5 years ago. Three times it went back to the repair facility. The company eventually replaced everything but with used reconditioned parts. Flash forward around 4 years later and I hear the big dog main pump running and running. I pull it out of the sump and find several dime size holes in the case. THE CASE RUSTED THROUGH. I called the factory repair guys and said I have two other sump pumps, 5.5 and 8.5 years old respectively from other companies and they are fine. All the Big Dog reps said was I need to follow maintenance procedures on pumps. They need to have CLR run through them periodically. You must wash the outside of the cases, etc... I think it sucks but did not have time to cut pvc and install a different brand during spring rains. PS the rep was really rude too. I would not buy this brand.
Date published: 2017-05-09
Rated 3 out of 5 by from Bought one of these a little over 3 years ago along with battery and acid. Install was fairly sim... Bought one of these a little over 3 years ago along with battery and acid. Install was fairly simple(now outside of their warranty). Fast forward to a week ago, after no alarm sounding, found out late in the evening pump was just re-circulating water within the pit and secondary pump not working - only found out because I happened to be by it looking for something. Pump had a huge hole in the side of the case and looked like it had been at bottom of ocean for 30 years. Not sure how the hole was created. I'm lucky my basement did not flood as it had been raining hard the day before. Unfortunately/Forunately Home depot was still open for a few more minutes and had to purchase the same kit as I did not have time or ability to cut custom length pipes for new system at 10pm with kids sleeping. Once I dropped new pump in, immediately started to pump out (there was no blockage in line) and thankfully had a lot of storage capacity in my draintile. Took 15+ minutes to fully drain lines. This is a very expensive unit if I have to replace every 3 years. Pump that I originally replaced the watchdog system in for was there 10+ years. If this goes again in a short time frame, will be looking for a better built system.
Date published: 2017-03-28
Rated 1 out of 5 by from I install this system BW4000 in july 2015, main pump fail and back up pump turn on, it fail in 8 ... I install this system BW4000 in july 2015, main pump fail and back up pump turn on, it fail in 8 hour, rainy for couple days, so my basement flooded. I called (to glentronics who makes watchdog), for help and about warranty. so they send me part to assemble the system, they do not relapse the combo system. so if if you buy this system, be ready for to assemble. In began with i told the person exactly what happen and we run for test. he send me one part and i have to call back ask for. he want me to run test again for the same thing. in sort it is not recommend.
Date published: 2017-05-05
Rated 2 out of 5 by from I bought this to replace a 1/3 hp pump that had been in place for 23 years. It was still working... I bought this to replace a 1/3 hp pump that had been in place for 23 years. It was still working, but it was getting old, and it didn't have a battery backup. I put this one in place, and it's been working fine; however, now, *less than four years later*, the main pump has failed. This caused it to run on only the battery backup until we noticed - at least several days. This destroyed the battery.
Date published: 2017-04-02
Rated 2 out of 5 by from My system is now 2 years old and I have to say I wish I had bought something else. The first one ... My system is now 2 years old and I have to say I wish I had bought something else. The first one I bought I've had to replace within a week since the paint was peeling off the pump. Did the work myself so the only extra expense was... my time. Down the road I've discovered that the controller for the backup pump does a really poor job at keeping the battery charged. I get the battery alarm come on quite often and every few months I must add distilled water and place the battery on a proper charger. But, you can only do that so many times until the battery becomes useless, so now I must add another deep cycle battery to the cost of this sump pump system. I hope they come out with a new solution for the battery charger/controller, which I assume is a trickle charger.
Date published: 2017-02-07
Rated 5 out of 5 by from Great sump pump! Our old sump pump (20+ years) failed when we got a lot of rain from the remnants of Hurricane Isaac, partially flooding our basement. I did a lot of research trying to find a quality combination primary and battery backup sump pump at a decent price, and I definitely found it! Home Depot had a very competitive price and got it to me very quickly. This was my first sump pump install, so it took me some time, but it was very easy. The only drawback was that I had to buy the battery and acid separately and pour the acid into the battery myself - a little nerve-wracking, but no problems. I thoroughly tested the system, and both the primary and battery backup pumps work perfectly.
Date published: 2012-12-03
Rated 4 out of 5 by from Easy install Control module has a led enunciator that has a few quirks. Once you activate everyth... Easy install Control module has a led enunciator that has a few quirks. Once you activate everything in the correct order it works.
Date published: 2017-05-02
Rated 5 out of 5 by from We purchased the sump pump about 3 months ago and it is working just fine. Very quiet and we appr... We purchased the sump pump about 3 months ago and it is working just fine. Very quiet and we appreciate that.
Date published: 2017-03-29
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