WAYNE CDU790 Review

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We reviewed the CDU790 to to see if it is a good enough sump pump for your basement. This pump is a 1/3 HP submersible sump pump made of cast iron and steel that is activated by a vertical float switch. It is manufactured by WAYNE PUMPS – keep reading to learn if it is the right pump for your basement.

Picking the right brand and pump can be hard with many similar models to choose from. This pump is a submersible pump which means most of the pumps sits inside the basin. It is hermetically sealed to keep water out and can be used for anything from draining flooded water or in the garden but is best used as a basement pump since you don’t want to move it around.

Model Specifications


The CDU790 costs a little more than $100 including shipping which is affordable for most homeowners, especially once you factor in that this pump will last for many years. We have reviewed many pumps at this is one of our favorite models that cost less than $150.

Many sump pumps quit working after one season, this WAYNE pump is tested for 1 million cycles and comes with a 3 year warranty. Here are some of the most important features.


  • Activated by mechanical float switch
  • Drains with a 1 1/2″ NPT discharge line
  • Cast iron body keeps water out
  • 1/3 HP submersible pump
  • Cord powered
  • Weighs about 16 pounds
  • Pumps a max 3,800 gallons of water per hour
  • Sealed and waterproofed with epoxy coated steel
  • Works best in 11″ diameter or larger basins

The CDU790 is powered by a 1/3 horsepower pump. This might not sound like a lot but it is enough power to drain 3.800 gallons of water from your basin every hour. The motor is the most common part to fail on broken sump pumps. This model is tested for 1 million operations so you can feel safe while it is keeping your basement dry. 

Since this product is a submersible pump the bottom of the pump will be under water which means the potential for leaks and water damage. It is designed with an epoxy coated steel keeps things water tight so there is not potential for shorting the motor to seal things from leaks.

Float Switch
This pump is activated by a vertical float switch. As water rises and floods your basin the float switch will start to rise causing the pump to turn on. It has a 9″ On level and a 4″ Off level. We recommend setting the level just above the “natural” water level of your pit.



CDU790 Advantages

The WAYNE CDU790 is a good choice for most homeowners. It has enough power to keep your basement dry and has a long lifespan so you won’t need to replace it every year. We recommend going with a high quality, durable pump like this one to prevent future water damage. The pump drains with standard plumbing lines and the entire unit can be installed in about 15 minutes.

Owner Feedback

Reviews across the web are mostly positive. There are very few reports of ‘lemons’ that fail after a month compared to other sump pumps, likely due to factory testing and high standards. Keep in mind this pump is designed for basins that are 11″ or larger and it will need occasional cleaning. Make sure to check for corrosion on a regular basis and that water is not leaking past the seals.

Why Should Your Purchase the CDU790?

Still not sold on the this WAYNE sump pump. Most people that need a submersible pump can use this pump without problems. It has more than enough power to keep medium to high flood basements dry, makes little noise and will work for a long time. Most people do not know how to install a sump pump which makes this model a good choice because it can be up and running in 15 to 20 mintes.

Need Sump Pump Help? Call (888) 831-2879

Have a Sump Pump Question?

Have a question about your Sump Pump? Call us at Nationwide at (888) 831-2879 or send it in and our team will lend you a hand!