Backup Power for Sump Pumps: The Ultimate Guide to Ensure a Dry Basement
Discover the peace of mind of having reliable backup power for sump pumps to keep the basement dry.
If you’re a homeowner, you understand the importance of keeping your basement dry and protected against flooding.
In this article, we’ll delve into the world of backup power systems for sump pumps, providing you with all the information you need to make an informed decision.
Table of Contents
Sump Pump Power Requirements
Determining your sump pump’s power needs is the first step towards choosing the right backup power system.
We’ll guide you through the process of assessing your sump pump’s power requirements and explain why matching the backup power system to your pump is essential.
Factors to Consider When Choosing a Backup Power System
Selecting the right backup power system for your sump pump is crucial.
Everyone that can afford a permanently install a 10KW natural gas backup generator should do so. This type of backup power for sump pumps is the most reliable and easiest to operate.
They automatically start and will run for as long as needed. The only limitation is the supply of natural gas.
An excellent alternative to a permanently installed generator is the Generac 7706 GP18000EFI 18,000-Watt Gas-Powered Electric-Start Portable Generator shown below;
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The second best sump pump option is to have two primary sump pumps. The second pump acts as the backup sump pump and runs off of an inverter backup system. If the first sump pump fails to operate or can’t keep up with the amount of water flowing into the basement, the second pump starts up.
Having two primary sump pumps means that the secondary or backup sump pump is able to handle the same amount of water as the primary pump. Most backup sump pumps are smaller than the primary pump and may not be able to remove as much water as is needed.
Of course, the smaller backup sump pump will run for a longer time on an inverter with battery or stand-alone battery charge but the basement might get wet.
The solution is to have more than one backup battery to provide for a longer run time.
Shown below is a 1/3HP 12 volt backup sump pump that is the same size as most primary sump pumps used in homes. Which is important because you want the backup sump pump to pump as much water as the primary pump does. You should seriously consider the Zoeller 508-0006 Aquanot 508 ProPak53 Preassembled Sump Pump System with Battery Back-Up. The battery is not included. Meets California regulations.
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Understanding Sump Pumps and Their Power Needs
Before we dive into solutions for backup power for sump pumps , let’s familiarize ourselves with sump pumps and their power requirements.
Sump pumps are essential devices that prevent basement flooding by removing excess water from the sump pit. Most backup sump pumps operate on electricity but there are water powered backup sump pumps available.
However, they all rely on a reliable power source to function effectively. We’ll explore how sump pumps work, discuss common power-related issues, and emphasize the need for backup power.
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Does Your Home Lose Electrical Power Very Often Or For More Than A Few Hours?
Then the best backup power for sump pumps would be a backup generator . This is because a battery backup system would not provide adequate protection.
Also, a water powered backup sump pump will not provide electricity to the rest of the house.
I Don’t Want to Buy a Backup Sump Pump. What Should I Do?
The least expensive and easiest to install backup power for sump pumps in this situation is an inverter battery backup system
Shown below is the Sec America 1622PS – 1800 Watt battery backup system which is used with a 12 volt battery to power a primary sump pump and/or a backup sump pump that operates on 110-120 volts.
- HOW IT WORKS: Pump Sentry will reliably power your sump pump during a power outage; it automatically switches to battery when AC power goes out & will automatically recharge when power is restored
- FEATURES: UL & CSA accredited, this 1800 Watt battery backup is compact & designed to operate most 3/4 Hp sump pumps; comes with indicators for power output, battery charge, & battery replace
- COMPACT & DURABLE: Housed in rugged aluminum, it’s compact in size; supports full pump capacity & can be easily installed – no extra plumbing or wiring needed; it offers a silent & clean operation
- WHAT YOU NEED: For functionality of the battery backup, connect a 12Volt deep cycle marine battery (purchased separately) with a capacity rating between 90 & 200 ampere hours; battery cables included
- BRAND PROMISE: We take pride in our rugged, built-to-last products & offer a 2-year factory warranty on our sump pump battery backup system; made & serviced in the USA
I Need Backup Power for Sump Pumps That Won’t Fail
The two most reliable systems to supply backup power for sump pumps are No products found. and water powered backup sump pumps.
A No products found. is as reliable as the supply of city water. These sump pumps will operate as long as the city supplies water to the house.
Types of Backup Power Systems for Sump Pumps
When it comes to backup power for sump pumps, there are several options available. We’ll explore four main types of backup power systems:
1. Battery Backup Systems
Battery backup systems are the most commonly used backup power for sump pumps.
They are used to run the 12 volt backup sump pumps. Whereas the primary sump pump runs on 110-120 volts.
The runtime of a 75 amp-hour or 100 amp-hour battery powering a 1/3 HP or 1/2 HP basement sump pump can vary based on several factors.
Including the efficiency of the battery system and the power consumption of the sump pump.
Shown below is the very popular and highly rated WAYNE – 1/2 HP Sump Pump with Integrated Vertical Float Switch and 12 Volt Battery Back Up.
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What Is the Range of Power Requirements for Basement Sump Pumps?
The power requirements for basement sump pumps can vary depending on the specific model and its intended use. However, the range of power requirements typically falls between 1/3 horsepower (HP) to 1 horsepower (HP) or approximately 250 watts to 750 watts.
Smaller sump pumps or those designed for residential use typically have power requirements in the range of 1/3 HP to 1/2 HP (250 watts to 375 watts).
These are suitable for standard residential basements and can handle moderate water inflow. See below.
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For larger basements or areas with higher water inflow, sump pumps with power requirements of 3/4 HP to 1 HP (560 watts to 750 watts) may be required.
These pumps provide greater pumping capacity and are more suitable for heavy-duty applications.
For larger homes or for greater water removal, consider THE BASEMENT WATCHDOG Big Combo CONNECT Model CITS-50 1/2 HP Primary and Battery Backup Sump Pump System. It is Smart WiFi Capable and has a 24 Hour a Day Monitoring Controller.
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It’s important to refer to the manufacturer’s specifications or the label on the sump pump itself to determine the exact power requirements for a specific model.
This information will help ensure that the backup power system you choose, such as a battery backup, generator, or inverter, can meet the power demands of the sump pump effectively.
Battery Capacity and Runtime
For battery backup systems, battery capacity and runtime play a crucial role in providing uninterrupted power.
We’ll explain their significance and offer practical advice on selecting the appropriate battery capacity and runtime for your needs.
It’s important to note that these estimations are approximate and can vary depending on factors such as the age and condition of the battery, the efficiency of the battery system, the pump’s power consumption, and other variables.
Additionally, keep in mind that running a sump pump continuously for extended periods is not a good thing. That can strain the battery and reduce its overall lifespan. However, when the power is out and the backup pump is needed you don’t have a choice of how long the pump runs.
The runtime of a 75 amp-hour or 100 amp-hour battery powering a 1/3 HP or 1/2 HP basement sump pump can vary based on several factors, including the efficiency of the battery system and the power consumption of the sump pump.
A study by North Dakota State University found that new batteries will last from 4 to 11 hours of continuous running.
This run time will depend on the battery capacity, which varied between 40 and 120AH (Amp Hours).
Add THE BASEMENT WATCHDOG Model BWSP to the existing primary sump pump. See below.
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The most popular backup sump pump batteries are the 75 amp-hour and 100 amp-hour batteries.
Here’s a general estimation of the runtime for 75 amp-hour and 100 amp-hour batteries with 1/3 HP and 1/2 HP sump pumps:
Note: These are continuous running times which is not what typically happens during a rain storm where the pump starts and stops during the day. Also, these are averages over the lifetime of the battery. Not what can be expected from a new battery.
75 amp-hour battery:
• 1/3 HP sump pump: The average runtime can range from approximately 1.5 to 4 hours.
• 1/2 HP sump pump: The average runtime can range from approximately 1 to 2.5 hours.
- TL1275/FP12750 Battery 12V 75AH Sealed Lead Acid Rechargeable Maintenance Free AGM Deep Cycle; Parcel: 1 x Battery (screws included, but no wire harness or mounting). Dimensions: 10.16 x 6.61 x 8.31 inches. High Performance, Long Service Life and Deep Discharge Recover. Terminal： Left : Positive (+)-Red, Right: Negative (-)-Black.
- Applications: Emergency power UPS-Equipments (Radar, Radio, Emergency lighting, Telecommunication, BSV-Equipment, Emergency light); Emergency power wind Energy plant (Pitch-adjustment, Control-/Automatic Technology, Communication systems); Rehab (Stair lift, Bath lifter, Electric care bed); Small starter batteries (Ride-on lawnmower, Generators, Startbooster);
- Fit For Wayne ESP25 Back-Up Pump, Electric Scooter, Golf Cart Electric DC, Solar Energy Storage, Pride Mobility Jazzy 1420 1450 Wheelchair, Hoveround Teknique HD XHD, Drive Medical Cobra GT4, Permobil M300 Wheelchair.
- General For UPS System, Solar Panel Wind Energy Storage, RV VAN House, Camping Trip, Industrial and Medical Equipment, Electric Vehicles, Golf Carts, Hunting, Lawn and Garden Tools, Portable Tools, Toys and Hobby, Emergency Lighting, Leisure.
- With a 30 day refund policy. We aim for quality followed up with quality customer service, Amazon doesn’t deal with the return of battery-related products, so please contact the seller directly. Weize support team is on standby for YOU.
100 amp-hour battery:
• 1/3 HP sump pump: The average runtime can range from approximately 2 to 5 hours.
• 1/2 HP sump pump: The average runtime can range from approximately 1.5 to 3.5 hours.
- Renogy AGM Batteries: Trusted Worldwide, Exceptional Safety, Extreme Performance! Support series (No limitation), parallel (Up to 4P) connections.
- 【Leading AGM Batteries】Renogy Deep Cycle AGM batteries have earned widespread trust with over 230,000 units sold worldwide in the past six years.
- 【Exceptionally Safe Chemistry & Minimal Troubleshooting】Compared to batteries made of other chemistries, Renogy Deep Cycle AGM batteries offer exceptional safety due to their higher chemical stability. Their integrated internal structure and sealed design spare you from intricate internal troubleshooting, a feature not shared by lithium batteries.
- 【Better Performance at Extreme Temp】The upgraded electrolyte formula ensures outstanding discharge performance within a temperature range of -4 to 140°F/ -20 to 60°C, surpassing that of other counterparts. You can use the battery at extreme temperatures without concerns about discharging performance in RVs or cabins.
- 【Power Most Appliances】 Featuring a 1100A (5 seconds) max discharge current and providing consistent, stable discharge, the battery can power most home appliances, including a fridge, microwave, CPAP, coffee maker, laptop, and more.
2. Gas Generator Backup Systems
When considering generator backup systems, understanding power output is vital. We’ll discuss the importance of matching the generator’s power output to your sump pump’s requirements and provide guidance on selecting the right generator power output.
Generators are widely used as backup power sources for various applications, including sump pumps.
Buying a small gasoline powered backup generator to run just the sump pump isn’t the best option for a few reasons.
These generators would normally need to be manually started. They typically would run a utility sump pump that isn’t permanently installed in the sump pit.
Since they run on gasoline the gas tank will need to be refilled regularly.
Shown below is the Pulsar G1200SG 1,200W Gasoline-Powered Portable Generator with a carrying handle. It just weighs 37.5 pounds which can be carried without much trouble.
- 1, 200 peak watts/ 900 running watts of power
So, the best backup generator to supply backup power for sump pumps would also power the rest of the house. These generators run on natural gas and are permanently installed outside the home. They start automatically. So, homeowners don’t have to be home when the power goes out.
What Size Electrical Backup Generator Is Needed to Run the Essential Power Needs of a New 3 Bedroom Home?
The size of the electrical backup generator needed to run the essential power needs of a new 3-bedroom home depends on several factors. Including the specific electrical load requirements of the home and the appliances you consider essential.
However, as a general guideline, a backup generator with a capacity of around 10,000 to 12,000 watts (10-12 kW) would typically be suitable for powering the essential circuits in a 3-bedroom home.
To determine the exact size of the generator needed, you should consider the following steps:
1. Identify essential circuits: Determine which circuits or appliances you consider essential during a power outage. This may include lighting, refrigeration, heating/cooling, water pump, sump pump, security systems, and basic outlets.
2. Calculate the electrical load: Add up the wattage requirements of the essential circuits and appliances.
You can find this information on the appliances’ labels or in their user manuals.
Make sure to account for both the running wattage and the starting wattage, as some appliances may require more power during startup.
3. Factor in additional capacity: It’s advisable to add a safety margin of around 25-30% to the total wattage calculated in step 2. This extra capacity allows for unexpected power spikes or the addition of extra loads in the future.
4. Consult an electrician or generator expert: It’s highly recommended to consult with a qualified electrician or generator expert.
Someone who can assess your specific electrical needs and recommend the appropriate generator size based on local regulations, load requirements, and installation considerations.
Remember, the size of the generator may vary depending on individual circumstances and the specific electrical load of the home. Therefore, it’s always best to consult with a professional to ensure the generator meets your specific needs and local requirements.
- Reliable Power: True Power Technology ensures best-in-class power quality with less than 5% THD, making it ideal for sensitive electronics and appliances
- Convenient Transfer Switch: Comes with an 8-circuit 50 Amp, NEMA 1 (indoor rated only) lightweight transfer switch for seamless power transfer during outages
- User-Friendly Control: Generac’s Evolution Controller features LED indicators for generator status, utility power presence, or maintenance requirements, making monitoring easy
- Durable Enclosure: The all-weather aluminum enclosure is built tough and allows for easy access during installation, service, and maintenance with three removable sides
- Battery Not Included: Please note that the Generac battery model 5819 is sold separately, ensuring you have reliable power backup during emergencies
- Remote Monitoring Anywhere: With the Mobile Link Wi-Fi connectivity, effortlessly keep tabs on generator performance from anywhere. Stay updated on current operating status and receive maintenance alerts, ensuring peace of mind even when you’re away
- Whole House Protection: Enjoy comprehensive coverage with Generac’s 100-amp 16-circuit transfer switch, designed for outdoor use with an aluminum enclosure. This ensures that your household remains powered and protected during power outages
- Long-Term Assurance: Count on lasting performance and reliability with our 5-Year Limited Warranty. This assurance provides you with the confidence that your investment in an automatic standby generator is one that will serve you well for years to come
- High-Quality, Consistent 10kW Power: With our advanced True Power Technology, experience power that beats expectations. Less than 5 percent total harmonic distortion guarantees clean and stable 10,000 watt power delivery, enabling safe operation
- Crafted for Excellence: Proudly engineered and assembled in the USA, our generators stand as testament to quality and craftsmanship. The purpose-built G-Force Engine is designed to handle the demands of usage, ensuring reliability and reduced maintenance
- Remote Monitoring Anywhere: With the Mobile Link Wi-Fi connectivity, effortlessly keep tabs on generator performance from anywhere. Stay updated on current operating status and receive maintenance alerts, ensuring peace of mind even when you’re away
- Whole House Protection: Enjoy comprehensive coverage with Generac’s 200-amp NEMA 3R smart switch, designed for outdoor use with an aluminum enclosure. This ensures that your household remains powered and protected during power outages
- Long-Term Assurance: Count on lasting performance and reliability with our 5-Year Limited Warranty. This assurance provides you with the confidence that your investment in an automatic standby generator is one that will serve you well for years to come
- High-Quality, Consistent 22kW Power: With our advanced True Power Technology, experience power that beats expectations. Less than 5 percent total harmonic distortion guarantees clean and stable 22,000 watt power delivery, enabling safe operation
- Crafted for Excellence: Proudly engineered and assembled in the USA, our generators stand as testament to quality and craftsmanship. The purpose-built G-Force Engine is designed to handle the demands of usage, ensuring reliability and reduced maintenance
3. Inverter Backup Systems
Inverters offer an alternative backup power solution for sump pumps. We’ll explore the benefits and limitations of using inverters, discuss their compatibility with different sump pump models, and recommend reputable inverter brands and models for your consideration.
Inverter Capacity and Compatibility
If you opt for an inverter as your backup power solution, it’s essential to assess the inverter’s capacity and compatibility with your sump pump.
We’ll walk you through the process of determining the right inverter capacity and ensuring compatibility for seamless operation.
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What Is the Inverter Capacity Needed to Operate a Basement Sump Pump Backup Battery?
An inverter backup system providing backup power for sump pumps still requires a backup battery. The difference is that the inverter can power any 110-120 volt sump pump. Whereas standard battery backup systems will only power 12-volt sump pumps.
The inverter capacity needed to operate a basement sump pump backup battery depends on the power consumption of the sump pump. To determine the required inverter capacity, follow these steps:
1. Identify the power consumption: Check the specifications of your sump pump or its user manual to find the power rating in watts. The power consumption can vary depending on the specific model and its size (1/3 HP, 1/2 HP, etc.).
2. Consider the starting surge: Sump pumps often require an additional surge of power to start up. This starting surge can be higher than the running power. Check the sump pump’s documentation or contact the manufacturer to determine the starting surge wattage.
3. Select an inverter capacity: Choose an inverter with a continuous power rating equal to or higher than the running wattage of the sump pump.
If the sump pump has a starting surge, the inverter should have a peak or surge power rating that accommodates that surge.
For example, if your sump pump has a running power consumption of 500 watts and a starting surge of 1000 watts, you would want an inverter with a continuous power rating of at least 500 watts and a surge power rating of at least 1000 watts to handle the initial startup.
It’s important to note that inverters come in various power ratings, such as 500 watts, 1000 watts, 2000 watts, etc. Choose an inverter that meets or exceeds the power requirements of your specific sump pump.
Additionally, consider the efficiency of the inverter. Higher efficiency inverters will convert more of the DC battery power to AC power for the sump pump, minimizing energy loss during the conversion process.
Always refer to the manufacturer’s recommendations and guidelines for the sump pump and the inverter to ensure compatibility and proper operation.
- Design for Basement Protection: Miumoon sump pump battery backup system are designed for basements to protect your home from flooding, When the power supply is normal, the pump is powered and charged automatically. When the power supply is cut off, it switches to battery power automatically, ensuring that your sump pump system operates smoothly and continuously. Whether it’s a hurricane or heavy rain, the Miumoon sump pump battery backup system can keep your basement dry at all times.
- Excellent Performance: Miumoon sump pump battery backup system output power is up to 1500 Watt and output current can operate at a maximum current of 13.6 amps, it is easy to running both single and double pump systems, saving you valuable time and cost, Miumoon sump pump battery backup is ideal choice for handling basement sewage, and enjoy a clean, pollution-free environment with ease.
- Charging mode: 1500W sump pump battery backup system has a built-in 20A battery charger that supports fast charging for various battery types, trickle charging and the unit is suitable for deep-cycle batteries, AGM batteries is recommended and suitable for other deep-cycle battery types, but not for non-deep-cycle batteries. In addition, Miumoon sump pump battery backup have overcharge protection, your battery will not suffer any damage, which greatly extends your battery life.
- Safety Use: Miumoon sump pump battery backup has a LCD display on side, which allows you to clearly understand the battery and sump pump operating status. Additionally, It also has a built-in cooling system and overload protector, as well as multiple protection functions, including overheat, short circuit, low voltage, overcharge protection, etc., which not only improves the safety of use but also extends the equipment’s lifespan.
- Easy to Install: Miumoon sump pump battery backup system requires no additional wiring, just assemble the AC and DC cable, it is a easy things. Multiple fixation modes, fixed hole on the side allow you flat placement or wall mounting. Miumoon sump pump battery backup system is your smart choice for easy and hassle-free installation
- HOW IT WORKS: Pump Sentry will reliably power your sump pump during a power outage; it automatically switches to battery when AC power goes out & will automatically recharge when power is restored
- FEATURES: UL & CSA accredited, this 1200 Watt battery backup is compact; it’s designed to operate most sump pumps up to 9 amps & comes with indicators for power output, battery charge, & battery replace. Not for use with pedestal pumps.
- COMPACT & DURABLE: This sump pump battery backup is housed in rugged aluminum & comes in a compact size; supports full pump capacity & can be easily installed; it offers a silent & clean operation
- WHAT YOU NEED: For functionality of the battery backup, connect a 12Volt deep cycle marine battery (purchased separately) with a capacity rating between 90 & 200 ampere hours; battery cables included
- BRAND PROMISE: We take pride in our rugged, built-to-last products & offer a 2-year factory warranty on our sump pump battery backup system; made & serviced in the USA
4. Water Powered Backup Systems
These operate on the amount of water pressured supplied by the city water system. The water powered backup sump pump operates by the city water causing a vacuum which sucks up the sump pit water.
The city supplied water line needs to be a 3/4-inch diameter pipe. Which provides enough water volume to operate the pump. Also, the 3/4-inch pipe provides greater water pressure than a smaller size pipe would allow.
Higher water pressure enables a higher flow of water from the water powered backup sump pump. Minimum water pressure would be 20 PSI and the maximum would be 90 PSI.
Shown below is the Basepump RB750 Water Powered Backup Sump Pump with Water Alarm. It is mounted on the ceiling of the basement. No electricity needed. Will run as long as needed.
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Keep in mind that not all water powered backup sump pumps can operate at just 20 PSI.
Also, usually, using water powered backup power for sump pumps means having a lower pumping rate than electric powered sump pumps.
Additionally, these systems require a backflow prevention device and many cities require them to be annually inspected.
Zoeller 540-0005 FLEX Series Water-Powered Back-Up Sump Pump. Install it just above the sump pit.
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Installation and Maintenance
Proper installation and regular maintenance are crucial for the optimal performance of your backup power system.
Natural gas backup systems will require professional installation. Which would include a gas certified plumber and an electrician.
Battery backup systems and inverter battery backup systems can be installed rather easily by a DIY installer.
Water powered backup systems will require a plumber to be installed.
FAQs About Backup Power for Sump Pumps
How long do battery backup systems provide power to the sump pump during an outage?
Battery backup systems typically offer power for a limited duration, typically ranging from a few hours to several days, depending on the battery capacity and the sump pump’s power consumption.
It’s important to choose backup power for sump pumps with sufficient capacity to meet your specific needs and consider factors such as runtime and recharge time.
Can I use any generator for backup power for my sump pump?
Not all generators are suitable as backup power for sump pumps. It’s crucial to select a generator that matches your sump pump’s power requirements.
Look for generators with adequate wattage capacity, clean power output, and automatic transfer switch compatibility to ensure seamless operation during power outages.
Can I use an inverter as a backup power source for my sump pump?
Yes, inverters that convert 12-volt battery power to 110-120 volts can be used as backup power sources for sump pumps.
However, it’s important to select an inverter with sufficient capacity to handle the surge power demands of your sump pump. Additionally, ensure compatibility between the inverter and your sump pump model to avoid any potential issues.
How do I determine the power requirements of my sump pump for selecting a backup power system?
To determine your sump pump’s power requirements, refer to the manufacturer’s specifications or label on the pump itself. Look for information such as horsepower (HP) rating or wattage.
If the wattage is not provided, you can calculate it by multiplying the pump’s voltage and amperage ratings.
Are there any specific safety precautions to consider during the installation and maintenance of backup power systems?
Absolutely! Water and electricity are a deadly combination. Safety should be a priority when installing and maintaining backup power for sump pumps.
Some general precautions include ensuring proper grounding, following the manufacturer’s instructions, and hiring a licensed electrician or plumber if needed.
When performing maintenance tasks, such as battery checks or generator servicing, always adhere to safety guidelines and disconnect power sources before working on the system.
The safest and easiest to maintain system to provide backup power for sump pumps is a water powered backup.
However, a plumber needs to install them and some cities require professional inspections every year.
Battery backup and inverter battery backups are the next safest systems that DIYers could install and maintain.
Natural gas backup systems require professional installation and maintenance.
Conclusions On Backup Power for Sump Pumps
Investing in reliable backup power for sump pumps is an investment in the protection of your basement against flooding. We’ve explored various ways to provide backup power for sump pumps. Here are the options:
Want the best? Get a natural gas electrical backup generator .
Have low water flow in the basement and abundant city water available? Buy a No products found..
Need to DIY install? Get a No products found.
Don’t want to buy a second sump pump? A battery and No products found. will power any 110-120-volt sump pump.
Those are your choices to provide backup power for sump pumps. Choose the best option that fits your needs and pocketbook.
Related Articles:
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Zoeller M53 Sump Pump Review. Best Value, Clog Free, Reliable
Author at Best Sump Pumps
The first time I helped to install a drain tile and basement sump pump system was 1978.
Since then I have worked for a city water utility where I worked with and maintained pumps.
My rental properties and personal homes all needed sump pumps.
As a modular home dealer/builder, those new homes needed sump pumps.
I put that experience to good use by providing reliable, useful, and practical advice on buying, using, and maintaining sump pumps.