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Basement Watchdog BWSP - Special Backup Sump Pump (1730 GPH @ 10')

Basement Watchdog Sump Pumps and Accessories
Model: BWSP
(Based on expert analysis, manufacturer ratings and customer reviews)
3.9 out of 53.9 out of 53.9 out of 53.9 out of 53.9 out of 5
9 Reviews
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  • Features
  • Specs
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  • Accessories
Back-up Sump Pumps
Switch Type
Vertical Float Switch
Protect Your Basement from Flooding
Automatically starts when your existing sump pump fails
Senses power outages

Exclusive Monitoring System
Controller monitors power conditions and battery life
Sounds alarm during failure or required maintenance
Unique charging circuit limits the battery from overcharging
Remote Notification - now able to communicate with an
Auto Dialer, Home Security System or other device

Backup Sump Pump
Empties the sump pit after a malfunction, outage or excess water
Pumps 2500 gallons-per-hour @ 0’ lift (or 1730 GPH @ 10’)
Switches to 12-volt DC battery power when AC power fails

1.6-Amp Battery Charger
Now AGM Battery Compatible
Recharges battery when power is restored

Dual Float Switch
Added redundancy for protection and piece of mind
Only needs to move 1/4" to activate the pump


12 Volt DC
Running Amps
Battery Included
Starting Amps
Housing Material
Float Type
Vertical Float
GPH @ 0 feet
GPH @ 10 feet
Battery Recharger
1.6 Amps
Made in USA
10 Pounds
Consumer Warranty
2 Years
Download Documents
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*Ask Jim about the Basement Watchdog BWSP. Sorry, no repair questions:




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  15 Questions
Q: I've owned and used Basement Watchdog battery backup systems for a long time and they have always performed very well for me but I see all these new systems with notification, self-testing and other nice features that would be great to have in a lower cost system. Will they ever improve or upgrade this system?
by Simon F from Wisconsin on November 14, 2014

A: Thank you for your interest in Sump Pumps Direct. And funny you should ask, Simon! Basement Watchdog has recently updated the controller in the BWSP. The newly updated system has been on the shelves and in circulation for about a year now. According to Basement Watchdog, the updated controller has proven its reliability, having sold over 10,000 systems - with only 5 defective units to date.

While this new controller has some similarities to our previous one, some significant hardware and software changes have been made. Those changes include:

• Remote Notification - We have added in terminals which allow for remote notification. This system is now able to communicate with an Auto Dialer, Home Security System or other device, to alert home owners to problems or required maintenance

• AGM Compatible - The most popular revision allows the customer to utilize wet cell, or AGM maintenance free batteries

• Improved Charging System – Improved battery monitoring and charging system

• Weekly Pump Activation – The system will run the pump for a few seconds every week to not only test the pump but to also exercise it which will help prolong the life of the pump

by Jim, Product Expert
Q: Which is better, a battery back-up system or a water back-up system?
by Linda L from Kentucky on February 06, 2014

A: Depending on the water table in your area and the potential for flooding you could go either way. If your water removal needs are below average, you could elect to go with a low GPH rated battery backup sump pump or water powered backup. Please note that water powered systems will only work with a minimum of 20-40 PSI. They will not work if you draw your water from a well. The typical water powered system would provide between 300-1000GPH of pumping capacity. If you're in a little higher water table that the flooding potential is a bit higher, you may want to consider a battery backup system rated at between 1000-2300GPH. If the flooding potential and water table are very high, you might look at the systems rated at 2400GPM and higher. You should also check with your local municipality to make sure that they are allowed as some municipalities have outlawed them as they do waste water in a sense.
by Jim, Product Expert
Q: Looking down the road, if and when the pump fails / wears out, would I be able to replace it or do I need to replace the entire unit? Hence, would I be able to use the power inverter or controller with other pumps? Thanks.
by Larry from Illinois on January 22, 2014

A: These battery backup systems, like any other system are designed to work with their specific components only. If any one of them should fail, you could contact the MANUFACTURER and they would assist you in replacing the specific component.

by Jim, Product Expert
Q: The sump pump is in small room in the basement with poor ventilation. This system has a battery with a charger. Doesn't charging the battery release gases? Are those gases harmful when inhaled?
by CA from Colorado on February 05, 2013

A: Thank you for visiting Sump Pumps Direct. In answer to your question, YES, batteries will produce harmful gases when charging.

This is what the Basement Watchdog Owners Manual has to say regarding the subject.

Explosive gases could cause serious injury or
death. Cigarettes, flames or sparks could
cause battery to explode in enclosed spaces.
Charge in well-ventilated area. Always
shield eyes and face from battery. Keep vent
caps tight and level.
To help reduce these risks, observe the
following precautions:
• NEVER smoke or allow a spark or flame in the
vicinity of the battery.
• Use the Basement Watchdog Special control
unit for charging a LEAD-ACID battery only.
Do not use the control unit for charging drycell
batteries that are most commonly used
with home appliances.
• Be sure the area around the battery is well
• When cleaning or adding water to the battery,
first fan the top of the battery with a piece of
cardboard or another non-metallic material to
blow away any hydrogen gas that may have
been emitted from the battery.
• DO NOT drop a metal tool onto the battery. It
might spark or short-circuit the battery and
cause an explosion.
• Remove personal metal items such as rings,
bracelets, watches, etc. when working with a
lead-acid battery. A short circuit through one
of these items can melt it causing a severe
• ALWAYS remove the charger from the electrical
outlet before connecting or disconnecting the
battery cables. Never allow the rings to touch
each other.
• Check the polarity of the battery posts. The
POSITIVE (+) battery post usually has a larger
diameter than the NEGATIVE (-) post.
• When connecting the battery cables, first
connect the small ring on the end of the
BLACK wire to the NEGATIVE (-) post of the
battery, and then connect the large ring on
end of the RED wire to the POSITIVE (+) post
of the battery.
by Jim, Product Expert
Q: Hi Jim, I am looking for a battery only sump pump that will pump 1500gph and I see the watchdog. I am looking to use this with battery only because power is not available for this project. I want to connect two batteries in parallel to give me more amperage. I am going to tie solar panels for charging purposes. My question is will it run if AC voltage is not there or will it turn on and off as water come in and raises the float? Thanks
by Kenneth Arnett from Mississippi on August 16, 2012

A: First off, the Basement Watchdog Special, model BWSP is not designed to operate with multiple batteries and will not do so. The only Basement Watchdog model capable of that would be the BIG DOG system. As long as the batteries are charged, it will operate whenever the float activates the pump. The Big Dog will also operate on AC power when it is available and DC power when the AC is not available.
by Jim, Product Expert
Q: Hi Jim, can I use the Basement Watchdog BWSP - Special Backup Sump Pump (1730 GPH @ 10') with a pedistal pump? I have considered the submeriable main sump pumps, but I like the ability to control the float on/off more with the pedistals for longer run times. Thanks!
by Mike from Michigan on August 12, 2012

A: As long as you have sufficient room in your sump basin, there would be no problem whatsoever!
by Jim, Product Expert
Q: I have a customer who wants to install a Sump Pump w/ Battery Back-up in an open stairwell. The battery and controller will be approximately 14' away inside the residence. Can I cut the control cable and splice the same gage wire to the inside location? Or will I new a heavier gage because of DC voltage?
by Russell from Maryland on April 23, 2012

A: For starters, the battery and control panel MUST be located indoors. The float switch and pump include 8' cables. Those can be extended a maximum 26' as long as the same gauge wire is used. The control wire or thinner gauge wire can be spliced as long as the gauge is the same or thicker.

12' extension cables with the Molex plugs for the pump and float are available direct from Basement Watchdog at 800-991-0466.

You would also need to provide extra protection from any possible freezing as this could potentially damage the pump beyond repair.
by Jim, Product Expert
Q: Is the PeakFlow 12v maintenance free deep cycle 120ah AGM battery compatible with the WatchDog BW4000 pump system and charger ? Will it last 7.5hrs in continuous mode like the battery sold with the kit? What is the shelf life if used 2x a year intermittently for 1hr. for
by Walter from Michigan on March 12, 2012

A: Per the instructions for the Basement Watchdog battery backup systems, DO NOT use a maintenance-free or a sealed battery. They are made of different materials and
will trigger a false “Battery problem” alarm.
A new Basement Watchdog 7.5 Hour Standby Battery, model 30HDC140S will run this system for a minimum of 7.5 hours continuously. However, most of the time the pump will turn on and off, and the battery will run the pump intermittently for days. In addition, the unique materials in the battery enable it to last for five to seven years in standby service.
by Jim, Product Expert
Q: If the backup pump is activated due to heavy water flow (to help the main pump) and the AC power stays on, will the system keep charging the battery to allow the backup pump to keep running indefinitely?
by Scott Mueller from Connecticut on January 24, 2012

A: Yes, the controller will keep the battery charging and the pump running indefinitely if needed. This is true for the Basement Watchdog model BWE and the BWSP stand alone battery backup systems as well.
by Jim, Product Expert
Q: will the watchdog special backup pump work with an existing sump pump? A few years ago we tried to add a battery backup and it wouldn't work with our current pump. So all I need to buy is the battery backup and install to my current sump pump? Thank you,

by Shari from Ohio on December 06, 2011

A: Short of a generator or an .Auxiliary Power System, there is no other option for a "battery backup" for your 120 volt primary sump pump.
The Basement Watchdog Special battery backup sump pump system, like any other battery backup sump pump system is designed to be installed along with your primary or 120 volt sump pump. The battery requirements for the Basement Watchdog Special are as follows:
A new Basement Watchdog 7.5 Hour Standby Battery will run this system for a minimum of 7.5 hours continuously. However, most of the time the pump will turn on and off, and the battery will run the pump intermittently for days. In addition, the unique materials in the battery enable it to last for five to seven years in standby service.

• The use of automotive batteries is NOT recommended.
Automotive batteries are not designed for this application. They will only run the pump for a short time and will have a shorter life than a standby battery.
• DO NOT use a maintenance-free or a sealed battery. They are made of different materials and will trigger a false “Battery problem” alarm.
• The battery fluid sensor and cap are designed to fit the Basement Watchdog batteries. Measuring the battery fluid is one of the most important features of the system; since about 80% of backup sump pump failures are the result of a dead battery
by Jim, Product Expert
Q: How can I tell how much GPH I need to go with my battery back up? How can I tell when my sump pump needs replacing?
by Aaron from Ohio on March 05, 2011

A: A typical sump pump will usually last anywhere between 5 & 7 years. When replacing, you should replace it with the same HP rating unless your pump has a difficult time keeping up with water to be ejected. As for the backup system, that would depend on the amount you are willing to spend and how much water you want your backup to eject. The higher the GPH, the higher the cost. However, you should just think of it as cheap insurance.
by Jim, Product Expert
Q: what parts do i need to install the watchdog 1730 dachuo sump pump
by Mel from Indiana on March 04, 2011

A: Installation instructions and parts required can be found in the owner's manual. You can access the owner's manual on the spec tab of the product page.
by Jim, Product Expert
Q: Do I need to leave my battery backup system charging at all times?
by Patrick Mcclone from Wisconsin on January 03, 2011

A: To be completely sure your backup system is fully functional during a power outage or weather event, these systems need to stay plugged in at all times.

by Jim, Product Expert
Q: If I buy a Basement Watchdog pump do I need a Basement Watchdog battery?
by Karen from Illinois on January 03, 2011

A: You can use any deep cycle marine battery, as long as it is not maintenance-free. However, there are several advantages to using a Basement Watchdog battery. The Watchdog battery accommodates the system’s fluid sensor which will sound an alarm when the battery needs water…a very important feature, since a dry battery will not perform. In addition, Basement Watchdog batteries run longer per charge, and last years longer. A typical marine battery will last 2-4 years, while the Watchdog battery will last approximately 5-7 years. Basement Watchdog batteries are shipped dry (without acid) so they stay fresh on the shelf indefinitely, while wet batteries have a short shelf life.

Update 11/16/15: Basement Watchdog has changed this requirement around 2013 and their backup systems will now accept maintenance free batteries. Please refer to their updated installation manual for instructions on the proper method for this battery installation.

by Jim, Product Expert
Q: Why doesn't this model come with a battery?
by Jon from Illinois on December 29, 2010

A: The same reason batteries are sold separately with toys.

Basement Watchdog builds thousands of these at a time - but they do not sell all at once.

Some units will naturally sit on the shelf longer than others.

To ensure the unit works right out of the box, we frequently purchase a limited supply of batteries and constantly rotate our stock.

This is a great replacement model. If you want a new system with a fresh battery, get the SPD-BWSPKIT instead.
by Jim, Product Expert
Basement Watchdog BWSP Reviews & Ratings
Overall Rating
3.9 out of 53.9 out of 53.9 out of 53.9 out of 53.9 out of 5
Quiet (1)
Reliable (1)
Durable (1)
I'd Buy It Again (1)
Exceeded Expectations (1)
Airlock issues for me (1)
100% of respondents would recommend this product to a friend
9 Reviews  Sort by 
Jeffrey W.
New Albany, IN
Purchased from Sump Pumps Direct
Purchased 2/5/17
Most Helpful Positive Review
5 out of 55 out of 55 out of 55 out of 55 out of 5
No Problems Here!
After having a standard sump pit and pump installed I knew I had to have a redundant battery-powered sump pump to sleep at night. After much research and reading mixed reviews on the Watchdog Special I decided to try it out. Sump Pumps Direct sent all my items very quickly and I had everything within a few days. Everything arrived as expected and in good shape.

I've never done plumbing before other than faucet replacements and toliet repairs, so I was pretty nervous about the... more
Pros: Features, Exceeded Expectations, I'd Buy It Again
Jeffrey Recommends This Basement Watchdog Product
Manufacturer Response
Brand Rep
Thank you for purchasing our product. Our systems are made for easy installation. If you ever need assistance with our products please call our service team at 800-991-0466 option 3 for technical assistance.
Was this review helpful?
Scott F.
Parkville, MD
4 out of 54 out of 54 out of 54 out of 54 out of 5
Saved My Basement. Has Lasted Many Years
I'm moving to a new house but leaving my home buyer with the watchdog big dog. This unit was fairly easy to install. I had to knock a second hole through my block as I ran a second line, but that was my choice. Honestly I don't lose power too often but during tropical storm Irene we lost power for many hours and the pump ran every 10 minutes. I watched the pump cycle nervously for a few minutes and decided to go to bed, hoping for the best. When I awoke the power was back on, but the watchdog... more
Pros: Durable, Quiet, Reliable
Cons: Airlock issues for me
Scott Recommends This Basement Watchdog Product
Was this review helpful?
Shaumburg, IL
1 out of 51 out of 51 out of 51 out of 51 out of 5
Battery Is Garbage
This unit and battery are complete garbage. The controller failed during a power outage. Lucky for us we were home to run our generator or we would have had a flood. The repair cost me $70 (ouch!) also the battery failed 13 months after installation. Save your money and buy another brand!
Manufacturer Response
Brand Rep
We are sorry that you are not happy with this product. We would love it if you reached out to us for further assistance, since we would not charge a repair cost in your situation. It sounds like your unit was under warranty. Also we would like to know if you had the battery tested before replacing since we do not recommend that the battery is replaced until it is professionally tested by load.
Was this review helpful?
Alpena, MI
1 out of 51 out of 51 out of 51 out of 51 out of 5
Replacment Parts
My unit has been troublesome. The company will not sell repair parts direct to me. I am looking to replace my unit with something from a more consumer-friendly company. I cannot recommend them.
Jim, the Sump Pump Expert
Product Expert
Basement Watchdog sells parts directly to consumers. They can be reached at 800-991-0466 or by e-mail at to place your order.
Manufacturer Response
Brand Rep
We are sorry that you are not happy with your system. As Jim states we do indeed sell parts to our customers just not complete units. Please call us directly for more information to the phone number above
Was this review helpful?
Princeton, NJ
5 out of 55 out of 55 out of 55 out of 55 out of 5
Best Price Around
Before I settled with my order for a Basement Watchdog special sump pump I checked around for prices and other brands and no body could beat Sump pump direct. However, I bought the battery and the acid at my local hardware store. Sump pump direct price for the battery and acid was more expensive because of the high cost of delivery. I found out that the battery specially the acid cannot be a regular delivery but need to be shipped by a special delivery.

The best part was that it was so easy... more
Manufacturer Response
Brand Rep
We thank you for choosing the Basement Watchdog and are happy that you benefited from the easy installation feature.
Was this review helpful?
Terry R.
Newton, KS
Purchased from Sump Pumps Direct
Purchased 2/25/16
5 out of 55 out of 55 out of 55 out of 55 out of 5
I'm very happy with this pump. I had bought one seventeen years ago and just now had to replace it so if this one last seventeen more years, it's just something you can't beat and not to have to worry about power failure.
Terry Recommends This Basement Watchdog Product
Manufacturer Response
Brand Rep
We thank you for your feedback on this product. We will be watching out for you hopefully for another 17+ years.
Terry's Experience With Sump Pumps Direct
Web Site


"Very friendly and helpful."
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Aimee Bohn
Rochester, NY
4 out of 54 out of 54 out of 54 out of 54 out of 5
Basement Watchdog Bwsp - Special Backup Sump Pump (1730 Gph @ 10') Review
I've never had a problem since I got this product.

Our basement used to flood all the time, but now I can catch problems at the first sign of water!
Manufacturer Response
Brand Rep
Thank you for your review. We are glad that we are able to help keep your basement dry.
Was this review helpful?
Schaumburg, IL
Purchased from Sump Pumps Direct
Purchased 5/12/12
5 out of 55 out of 55 out of 55 out of 55 out of 5
Basement Watchdog
Very good price from SUMP PUMPS DIRECT. - Very fast shipping. - Easy to install and set up. Very satisfied.
Manufacturer Response
Brand Rep
Thank you for your review. We appreciate your feedback.
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Westerville, OH
5 out of 55 out of 55 out of 55 out of 55 out of 5
Saved Me 2 Times Already
Had a power outage for 12 hours and pump kept working moving water out of the sump. Then, during a rain storm heard the alarm sound ran down to the basement to find out that the back up had kicked on. Main sump pump switch had stuck, gave it a smack and it started working. Just ordered a new pump from sump pump direct. A small price to pay for a piece of mind. Easy to install!!
Manufacturer Response
Brand Rep
Thank you for your feedback. We are happy that we are able to assist with your peace of mind.
Was this review helpful?
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