CDU790 1/3 HP Submersible Water Pump, Heavy Duty Basement Sump Pump

So far super quiet and seems to be of better quality than my last unhonorable mention.

We have two sump pumps in our basement to keep it nice and dry. Every 4 years or so, even less, we have to replace one. I have been buying the same brand every time and thought there has to be something better. I have read how good the Wayne sump pumps are and decided to try one out. I got the model WAYNE CDU790 and it is absolutely great. Right away out of the box you can feel is it quality. The old ones I bought were thermoplastic and only one lasted the expected 5 years. Some lasted a little over 4 years, most did not. The cast iron is heavy duty with stainless steel hardware holding it all together. The impeller is also stainless steel protected by a cast iron shroud. It has a long cable for reaching the outlet. The installation was very easy, and the operation is so quiet that I was worried that it wasn't working. I had to remove the cover to see if it was working and it is. My old pumps were so loud you could hear them upstairs every time they ran. The Wayne pumps water MUCH faster than the old pumps I bought. The sump empties in a matter of only a few seconds. This is a solid sump pump with a 3 year warranty. I registered it online immediately and am confident it will outlast my old pumps by far. The expected life if 6 years. For all of that, I give it 5 stars. Also for a super value and price as well as terrific quality.

This sump pump is great. This was my third pump that I purchased . My water well is very narrow measuring at interior for 11 inches diameter . None of the other pumps would work as the float would get stuck and make pump run indefinitely (even those that claim to be “tight space friendly “. This pump fits just right , it’s silent , expels water outside very quick and effectively . Best of all it comes with 3 year warranty unlike the competition at only one year . Highly recommend

Years ago, I installed a Wayne CDU 790 model to replace two older side-by-side pumps left behind by the previous owners of my house. (The previous owners relied on two pumps in the crawlspace because they had a serious water intrusion problem due to an improperly retired septic system. As the new owner, I mostly resolved that problem by having the old field lines dug up and smashed.) The Wayne pump lasted 13+ years (Feb 2012 - Aug 2025). Its main task was to pump out air conditioner condensate that accumulates during the summer season, as well as to pump out seepage following prolonged periods of rain. It lasted way, way beyond its warranty period. Eventually the float disconnected from the pump activation arm, and the bottom perimeter of the float had somehow badly deteriorated as well, permeated by holes all around. I only (and luckily) learned of these problems due to a recent "pre-vacation" check. The pump motor was still operational, but given the general level of deterioration overall, it seemed like it was time to retire the pump. Since this first unit lasted so long, I just installed another of the same model. I suppose that I should have proactively changed out the pump after about 10 years. Machines ultimately fail, and require periodic monitoring.

Lasted about 7 and a half years pumping water from my washing machine. Not sure what the life span of these usually are but I guess I can’t complain too much for the price. Bought another to replace the old one.

Quiet and works well so far. No complaints.

Purchased April 24'. Lots of debris gats into my drainage , hence into my well . While for 24 years I would periodically remove the other pump , hose it off return ( no promblems) . Lasted 24 years , builders grsdd ( cannot now remember brand). I know I could get same replacement. This model here I noticed was not pushing out the amount of water as previously from the outside pipe. In checking , figured it needed main cleaning. When I removed there was as expected lots of trash , dirt leaves around the impeller blades. Anyway I cleaned thouraly, returned and works efficiently except that I noticed the float does not fall all the way down sfter pumping out water, hence water levels are pretty high for my liking. I can lift float and it removes remaining water, float falls yo low resting. Is the float damaged ? Or is this tge design ?

Replaced my expensive Zoeller. Works great!

Excellente pompe, prix raisonnable. Fonctionne encore très bien quelques années plus tard.

Same plumbing as my previous pump so installed in 5 minutes, including unpackaging. Worked the instant I plugged it in and well water was instantly gone. Very impressed. Far better quality than that available at the big box stores and about the same price. Delivery to your door the next day is far more convenient, especially when you get a superior product.

Received the product quickly. Well packed. The pump is heavy and appears to be of the high quality expected from Wayne. Easy to install. The pump has a top handle so that makes it easy to raise and lower during installation. Another thing I like is there is a guard to protect the float from touching the side of the sump wall. The pump starts with about 9" of water in the well and shuts off with about 5" remaining (about a 4" cycle). My sump is 24" X 18" and it completes the cycle in about 6 seconds, That's about 1 US gal/sec.. The inlet holes are up from the bottom. I like this because it prevents air locking and also prevents any debris from getting into the impeller. I have it piped with 1-1/2" ABS all the way to the ditch (30') and going through a Zoeller check valve. I have about a 5' head. Last but not least the pump is very quiet! Hope this helps someone.

If you're in the market for a reliable and effective sump pump, look no further than the Wayne CDU790. I recently purchased this pump for my basement, and I have been blown away by its performance and durability. The CDU790 features a 1/3 HP motor, which is powerful enough to quickly and efficiently pump water out of your sump pit, while still being energy-efficient and cost-effective to operate. The cast iron and steel construction of the pump is incredibly sturdy and built to last, and the integrated vertical float switch makes it easy to monitor water levels and ensure that the pump is working properly. One of the things that really sets the CDU790 apart is its quiet operation. Unlike other sump pumps that can be loud and disruptive, this pump is virtually silent, making it a great choice for homes where noise is a concern. Overall, I am extremely satisfied with my purchase of the Wayne CDU790 sump pump. It is reliable, efficient, and built to withstand even the toughest conditions. If you want peace of mind knowing that your basement is protected from flooding, I highly recommend giving this pump a try. It's a great investment that will pay off in the long run!

Nice and quiet ! Unit is as described. Would be nice if you could control the limit switch so the pump could turn on sooner in order to keep the water level lower. I used a piece of 2"long x 1/2" dia. rubber hose on the float and solved my issue. Pump runs more often for shorter periods. After a couple heavy rains the pump worked excellent .