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Model # 330RSU

Internet # 100114282

Store SKU # 784935

1/3 HP Submersible Sump Pump

This item has been discontinued.
The Home Depot no longer carries this specific product.

$159.00 / each



Model # 330RSU

Internet # 100114282

Store SKU # 784935

The RIDGID 1/3 HP Submersible Sump Pump provides a maximum pumping capacity of 4,200 gallons per hour. The unit features a submersible two-pole switch and a top-suction intake that allows for 1/2 inch solids to pass.

California residents: see  Proposition 65 information

  • High performance, energy efficient motor lengthens the life of the switch and electrical components
  • Unique top suction design reduces clogging and prevents air locks
  • Upper and lower ball bearings in a sealed bath of oil for quiet performance and long life
  • Carbon/ceramic shaft seal for smooth operation and long life
  • 11/2 in. NPT discharge for easy installation and compliance to building codes
  • Cast iron impeller and base construction to out perform in tough SUMP applications
  • 11 in. diameter or larger sump basin minimum
  • Home Depot Protection Plan:

    Home Depot Protection Plan

Info & Guides

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Maximum Pumping Height (ft.) 
Product Depth (in.) 
10 in 
Product Height (in.) 
Product Width (in.) 
Switch-Off Height (in.) 
Switch-On Height (in.) 
Amperage (amps) 
Battery Back-Up 
Cord Length (ft.) 
Discharge Flow @ 0 ft. (gallons/hour) 
Discharge Flow @ 10 ft. (gallons/hour) 
Discharge Flow @ 15 ft. (gallons/hour) 
Horsepower (hp) 
1/3 hp 
Housing Material 
Maximum Working Temperature (F) 
Minimum working temperature (F) 
Power Type Required 
Product Weight (lb.) 
16 lb 
Pump Switch Type 
Sump Pump Outlet Diameter Type 
1-1/2 FPT 
Voltage (volts) 
Warranty / Certifications
Certifications and Listings 
CSA Listed 
Manufacturer Warranty 
RIDGID 3 Year Limited Warranty 


Rated 3.0 out of 5 by 54 reviewers.
Rated 1.0 out of 5.0 by Bad product The weak part of the product was the outside thin supporting bar. It is easy to broken due to the rust under the water. You will not detect the issue until your basement is flooded. March 11, 2014
Rated 5.0 out of 5.0 by Great, quiet pump! Bought this pump to replace my 1/3 horsepower Wayne brand sump pump. This pump was simple to install and runs much more quietly that my previous pump. June 4, 2015
Rated 1.0 out of 5.0 by Cheap parts This pump looks great for the price until you open the box and install it. The float is of concern, because there is a rubber guide for the float rod. This part is of big concern, because it comes loose easily. October 21, 2014
Rated 4.0 out of 5.0 by Good pump, switch easy to fix First, the pump fine. It is very reliable and quiet in operation. The switch can be problematic as they sometimes stay stuck in the "on" position and as a result, the pump runs continuously and can fail. These pumps are made by Wayne. Either Ridgid or Wayne should revise this switch. My switch failed after two years. Here's how to fix: 1. Remove switch from pump. 2. Remove screws from switch housing. 3. Remove cover. 4. Press on diaphragm to confirm switch is not seized. You should hear it "click" when you press it (switch is "on"), it should "click" again when you let go it (switch is "off). 5. Carefully remove diaphragm. Clean diaphragm and switch housing. 6. If diaphragm is distorted, use a hairdryer to restore to original shape. 7. Using clear silicone caulk, apply sealant to the surface where the diaphragm seats in switch housing. 8. Re-insert diaphragm. Make sure the diaphragm is not concave, and that there is a pocket of air between the diaphragm and inner "click" switch (from step 4). This air pocket is what makes the diaphragm work. It is this loss of air that causes them to fail! 9. Next, apply a "face bead" of silicone to where the rubber diaphragm meets the plastic housing on the outside. This will prevent water and sediment from getting between the diaphragm and "click" switch. Do NOT press the diaphragm or reinstall switch to pump until silicone caulk is completely dried. 10. Once dry, reinstall and enjoy your properly functioning pump. If you just bought it and have not installed it yet, I would recommend doing this procedure first!! Otherwise, make the repair before failure. You'll thank yourself. January 4, 2014
Rated 1.0 out of 5.0 by Switch design flaw The switch is the weakest link on this pump. My old sump pump lasted nearly 15 years before it went out. Bought this pump to replace it. The new pump failed in less than 3 months, which caused flooding in my crawl space. The "diaphragm" switch appears to be defective by design. When I plugged the motor in without the switch, it was completely dead. I'm guessing the switch got stuck in the "ON" position, causing the motor to run continuously until it burned out. Fortunately the pump was under warranty and Home Depot offered an exchange. I do not recommend this pump at all, or any other brand of pump that uses a diaphragm switch. Buy something like a Zoeller or Flotec. The only good thing about this pump was that it was very quiet. November 27, 2011
Rated 4.0 out of 5.0 Good pump, bad switch, Part 2 I felt I had to post a followup to my original review. Even though the diaphragm switch failed after 11 months, Ridgid and Home Depot made good for me. I called Ridgid customer service, told them my story, and they immediately offered to express ship me a new switch (at no cost to me), or I could return the entire pump to Home depot and get a new pump, again at no cost to me. I decided to get the new pump. I went to Home Depot and without hesitation, the customer service person told me to go ahead and get a new pump. So, at least for great service, I have to give a postive review. November 2, 2009
Rated 4.0 out of 5.0 by Lumber purchases Only been in for a few weeks. So far so good. Too early to tell. My pump kicks on several times a day. Very good pumping strength February 10, 2015
Rated 3.0 out of 5.0 by Just OK Pros: easy to install. I just used my preexisting plumbing and was done in 5 min. Very quiet operation and powerfull suction. Cons: Requires about 10 inches of water to trigger the switch. The pump is almost submerged before it starts to pump. Because of the diaphram, you can't manually trigger the pump. I tested the pump by dumping buckets of water in the sump pit. It actually took me longer to test the device than it did to install it. Warranty requires you to replace the switch ($75) and Stator ($94) every 2 and 5 yrs, respectively. Hmmm, I think I they're telling me to buy a new pump every 5 yrs? That doesn't make any sense to me. March 19, 2008
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