Battery Backup Sump Pumps
If you are looking for The BEST battery backup sump pump system or Primary sump pump you have come to the right place! Along with backup systems Glentronics has matching batteries and a water alarm!

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PROTECT YOUR HOME from unwanted water with Basement Watchdog Battery Backup Sump Pumps and Primary Sump Pumps!
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Watchdog Dual
Float Switches

Why do I need
a battery backup
sump pump?
BASEMENT WATCHDOG BATTERY BACKUP SUMP PUMP INSTALLATION - FREQUENTLY ASKED QUESTIONS
The pump runs continuously, what do I do?
No water is being pumped out of the sump pit, what’s wrong?
Why drill the 1/8" hole in the PVC pipe?
Can I connect two batteries together?
How does the pumping capacity of this pump compare to an AC pump?
Why use a Basement Watchdog battery?
Why is the “battery fluid low” alarm on even after the cells are filled to the proper level?
Explain “clean battery terminals”.
Why can’t I use a sealed or maintenance-free battery?
Why does my battery smell like rotten eggs when I fill it with acid?
How long do I have to charge the battery after I add the acid?
How often should I add water to the battery?
How long does it take to fully charge a battery after is has been used extensively?
Where do I find the serial number?
Why does my carbon monoxide detector go off near the battery?
Does my warranty start from the date of purchase or the date of installation?
Where can I get help?
The pump runs continuously, what do I do?
Make sure the float switch is properly mounted with the round float hanging below the metal bracket. Make sure the bracket is straight, not on an angle. Once the float switch is activated it starts a timer that will run the pump about 40-60 seconds before it shuts off. This way it will empty all the water in the sump pit. It will not damage the pump if it runs dry after all the water has been discharged from the sump.
Float Switch
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No water is being pumped out of the sump pit, what’s wrong?
The first thing to check is the installation of the pump. Make sure the pump is plugged in to the back of the control unit. Second, if a check valve has been used in the installation, make sure it is installed correctly. It should allow the water to flow upward. If it is upside down, no water can pass through it. There is an arrow on the valve. Make sure it is pointing up. If you are using 2 check valves, both check valves must be installed below the “Y” connector. Finally, make sure a 1/8” hole has been drilled in the PVC pipe about 3 inches above the pump. (See next tip)
Y connection
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Why drill the 1/8" hole in the PVC pipe?
The purpose of the 1/8” hole is to prevent the pump from becoming air locked. A pump that is air locked cannot pump water. This hole should be drilled approximately 3 inches above the pump at a 45° angle directed downward so the water will flow back into the sump.
1/8" Hole
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Can I connect two batteries together?
Only if they are used on the Basement Watchdog AC/DC system(Big Dog). To do this, the two batteries need to be hooked up in parallel (+) to (+) and (-) to (-). A special cable can be ordered directly from the manufacturer by calling Glentronics at 800-991-0466 extension 12.
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How does the pumping capacity of this pump compare to an AC pump?
  • The pump in the Basement Watchdog AC/DC system is approximately the same as a 1/3 HP AC pump.
  • The pump in the Basement Watchdog Special is approximately half way between a 1/3 and ¼ HP AC pump.
  • The pump in the Basement Watchdog Emergency system is slightly less than a ¼ HP AC pump.
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Why use a Basement Watchdog battery?
The Basement Watchdog batteries have been designed specifically to work with the Basement Watchdog backup systems. They are the only batteries that accommodate the fluid sensor, a very important feature for maintaining battery performance. They are constructed to provide longer pumping times than most other batteries, and to last longer in a standby mode…usually 5 to 7 years.
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Why is the “battery fluid low” alarm on even after the cells are filled to the proper level?
The first thing to check is the placement of the fluid sensor. It should be in the second cell from the positive (+) terminal of the battery. If it is in any other cell, it is not measuring correctly. Make sure all 2½ inches of the sensor is inserted in the pre-drilled hole in the battery cap.
Battery Connected
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Explain “clean battery terminals”.
Over time, corrosion forms on the terminals that connect the battery to the unit. This corrosion is common, but if it is not cleaned off, the battery will not charge properly. The Watchdog has the ability to detect this corrosion and will sound an alarm when it needs cleaning. Use a stiff wire brush or sandpaper to clean the battery terminal posts, the rings on the end of the battery cable, and the wing nuts until they are shiny. See the manual for detailed instructions and safety precautions.
Clean TerminalsClean Terminals
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Why can’t I use a sealed or maintenance-free battery?
Basement Watchdog systems were designed around the Basement Watchdog batteries, which are not sealed. Sealed batteries or maintenance free batteries are made out of different materials. They respond to a charge and discharge differently, and the Basement Watchdog sump pump systems notice the difference. The older Basement Watchdog Special system will sound an alarm as if there was a battery problem if you use a sealed battery.
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Why does my battery smell like rotten eggs when I fill it with acid?
The smell of rotten eggs is common when the battery is filled for the first time. When you fill the battery with acid, the initial reaction between the plates and the acid produces sulfur dioxide. It smells like rotten eggs, but it is harmless and will dissipate within a short time.
Filling Battery
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Do I have to charge the battery after I add the acid?
No. By adding the acid you are activating the battery. After adding the acid, the battery will be charged 80% to 90% within 15 minutes. It can be used immediately, and the system will complete the charging process once the charger is plugged into the wall.
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How often should I add water to the battery?
Add water to the system when the “battery fluid low” alarm sounds. For the Basement Watchdog AC/DC system, water may need to be added approximately once a year. For the Basement Watchdog Special or Emergency system, water may need to be added every 6 to 9 months. Time may be shortened if a battery has been used frequently or for long periods of time. If you are adding water more frequently the system may be overcharging the battery, and it needs to be serviced.
Adding Water To Battery
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How long does it take to fully charge a battery after is has been used extensively?
It depends on the size of the battery and the sump pump system that is doing the charging. The AC/DC system has a powerful 20-amp charger that will charge a discharged battery in approximately 6 hours. The chargers on the Basement Watchdog Special and Emergency systems are less powerful trickle chargers, and they will take several days to recharge a battery. You could take the battery to a service station for a quicker charge, or hook the battery up to an automotive charger if you have one. You must disconnect the control unit if you use another charger.
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Where do I find the serial number?
The serial number labels are located on the back of the control units (the boxes with all the lights), not on the pump.
On the Basement Watchdog A/C-D/C system, the serial number is on the back of the blue control unit.
BWD Serial Number
On the Basement Watchdog Special, the serial number is on the back of the black control unit on the top of the battery box.
BWSP Serial Number
On the Basement Watchdog Emergency system, the serial number is on the back of the yellow control unit.
BWE Serial Number
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Can my carbon monoxide detector go off near the battery?
Occasionally because a carbon monoxide detector cannot differentiate between sulfur dioxide and carbon monoxide. Sulfur dioxide, which is emitted by the battery, is not harmful. Move the carbon monoxide detector a little further away from the battery.
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Does my warranty start from the date of purchase or the date of installation?
The warranty on all Basement Watchdog products begins at the date of purchase.
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Where can I get help?
Glentronics, Inc. technical service: 800-991-0466, option 3
E-mail: mail@glentronics.com
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