The premium water powered backup sump pump


Basepump Logo

"Ask for it by name"

Basepump Ejector

Basepump Water Powered Backup Sump Pump

  • It's HURRICANE SEASON!! Rain, power outages, flooded basements! Get this now. Our two most popular models (RB750 and HB1000) are both on SALE now!
Five Year Limited Warranty
Water Alarm Photo

Included Water Alarm

  • Five (5) Year Limited Warranty on every Basepump! Included!
  • Water Alarm Included! A battery-powered water alarm ($29.00 value) is included with every Basepump.
  • No Electricity needed.
  • No battery to wear out or maintain
  • No charger to plug in or monitor
  • Automatic, independent system from the primary sump pump.
  • Uses water pressure from your existing water supply to remove water from the sump.
  • Highest pumping rates in the industry.
  • Most reliable operating system on the market.
  • Heavy duty construction, made from corrosion resistant polypropylene.
  • Simple to install; detailed instructions included, basic plumbing skills are required.
  • Low cost of operation (only the cost of the water during actual operation).
  • No moving parts to break and no maintenance required.
  • Basepump mounts on the ceiling so it only has to pull up the sump water.
  • Basepump rivals the best battery powered backup sump pumps, short- and long- term. Period.

So instead of a flooded basement because of a sump pump failure or a power failure, install a water powered Basepump backup sump pump before it happens.

Basepump Ejector showing the water entry and exit points

Click for more details about how Basepump works.


  • RB750 $198.00
  • RB750-EZ $279.00
  • HB1000 $289.00
  • HB1000-PRO $359.00
  • HB1000-PRO-V $379.00
  • CB1500 $395.00

Buy Now

Basepump Models

Gallons of Sump Water Removed per Hour.
10 ft. Lift at These Static Water Pressures
Model40 lbs PSI60 lbs PSI80 lbs PSI90 lbs PSIGPM


700 750 800 900 7
950 1,000 1,200 1,400 10
CB1500 1,400 1,500 1,700 2,000 15

Basepump uses 1 Gallon of City Water to remove 2 Gallons of Sump Water at an average of 90 lbs. PSI and 10 Feet Lift

This chart simply means that if you have the given water pressure in your home, with all faucets and Basepump turned OFF, the pumping rates shown in this chart are the rates you should expect from the model you choose. The pumping rate in your home may vary depending on factors such as restrictions in your water lines or long discharge pipes.

Choosing Size

"How do you know what size to buy?"

First determine your pumping need: How often does your electric sump pump run during a rainy period? Generally speaking:

  • If your pumping cycles are more than 4 minutes apart, then an RB750 should be sufficient.
  • If your pumping cycles are less than 4 minutes apart, then an HB1000 might be a better choice.
  • For commercial and very large home applications: If your pumping cycles are less than 1 minute apart, then a CB1500 may be the best choice. This model is rarely used in residential homes because it requires a much higher than average water supply to operate it.

Then determine your pumping capability: How much pump is your water supply capable of running?
To calculate this:
Fill a bucket with 5 Gallons of water as quickly as you can at your outside hose spigot, without the hose, and time it with a watch or stopwatch.

  • You must fill 5 gallons in less than 40 seconds for the RB750 to work.
  • You must fill 5 Gallons in less than 30 seconds for the HB1000 or the RB750 to work.
  • You must fill 5 Gallons in less than 20 seconds for the CB1500, or the HB1000, or the RB750 to work.

Now put your pumping need together with your pumping capability and you have the answer.
Note: you may use a smaller pump than the bucket test allows, but not a larger one, even if your "pumping need" appears higher.
There are a few exceptions to be aware of as seen here: 5 Gallon Bucket Test, as shown on our Homeowners Page.

You can print out your own Easy 3-Step Basepump Selection Guide here.

Included with All Basepump Models:

  • Basepump Ejector made from polypropylene to resist rust, corrosion, and scale build-up.
  • One-way check valve to prevent reversal of water flow down into sump to protect your home.
  • Mounting clamps and screws.
  • Velcro straps to keep things neat.
  • Flexible PVC discharge hose to help make the discharge piping easier.
  • Float assembly with Transfer tube to operate the ejector valve.
  • Suction screen to keep foreign objects out of the pump ejector.
  • Installation instructions that are complete, illustrated, and easy to follow.
  • Water alarm with 9 Volt battery and relay outputs included, a $29.00 Value, with every Basepump purchased, to warn you of a high water condition.
    This alarm may be connected to your security system or to an independent auto-dialer. (Note: actual alarm may vary slightly from alarm photo.)

We have No-Sweat (Push-fit) water supply installation kits that take the fear out of doing it yourself, as well as pressure reducers for especially high pressure situations on our Accessories Page. See our Back-Flow Prevention Page for Dual Check Valves, Vacuum Breakers, and RPZ Valve Units.


  • RB750 $198.00
  • RB750-EZ $279.00
  • HB1000 $289.00
  • HB1000-PRO $359.00
  • HB1000-PRO-V $379.00
  • CB1500 $395.00

Buy Now

Customer Satisfaction Guarantee

Within 30 days of purchase, if you are not completely satisfied with your new Basepump, Base Products Corp. (The Company) will refund your money, in full, excluding shipping charges. Pump must be in its original package with all parts included and in salable condition. Please contact the dealer where you purchased your pump to obtain refund. If purchased directly from The Company, you must call our Customer Satisfaction Department at 1 800 554 1426 to process return or to receive Technical Assistance. Please give your name, address, phone number, date of purchase, and address of the installation.

Five Year Limited Warranty