Model # 330RSU

Internet #100114282

Store SKU #784935

RIDGID 1/3 HP Submersible Sump Pump


1/3 HP Submersible Sump Pump

Frequently Bought Together

Product Overview

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
  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

what is the warnnty on this pump?

Asked by: Anonymous
Currently, 3 years. Those purchased before 2006 had a Lifetime Warranty.
Answered by: Helper
Date published: 2015-11-06

My rigid sump pump has a switch that is bad. Don't know where to go for the part. Can't seem to find it in the Internet.

Rigid 1/3 hp sump pump
Asked by: Lynn
Not an exact replacement, but may work with some modifications....and probably not sealed, needs to be out of the water. HD has this for $9. It is designed for pedestal pumps (motor not in the sump pit). Water Source Model PRS-1 Internet #203449542 Replacement Switch for Pedestal Sump Pump
Answered by: MrMike
Date published: 2016-09-07

it sounds like there is an alarm that is going off, but the pump is not pumping.

Asked by: rtw
Thank you for contacting RIDGID. Based on the information provided here, the primary pump does not have an alarm. It sounds like your back up is activating. The primary pump is likely not pumping and that is causing the back up system to alarm. We hope this helps.
Answered by: RIDGID
Date published: 2016-06-16

Can the base of the model 330RSU pump be removed for cleaning?

Asked by: Dick
Probably. But why would you need to? This is not an effluent pump. It is designed to remove (pump out) accumulated ground water, not sand,silt, mud or rocks. The pump should be installed above the bottom of the sump pit on a block (a paving stone will work) to prevent 'hard objects' form entering the impeller housing.
Answered by: MrMike
Date published: 2016-05-04
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Customer Reviews

1/3 HP Submersible Sump Pump is rated 3.1 out of 5 by 64.
Rated 1 out of 5 by from Didn't last two years. Junk. Didn't last two years. Junk.
Date published: 2017-01-04
Rated 1 out of 5 by from 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.
Date published: 2011-11-27
Rated 5 out of 5 by from Easy 'do it yoursef project' to save $300+ plumber cost Installed one of these in my home 10 years ago. Needed to replace my daughters sump pump. It was probably ~ 10 years old and the switch got stuck on during an early Spring rain. The cost of a new switch is $20~$30 range, and that would have fixed it. However these pumps have a 5~10 life span depending on your ground water. So I opted to just replace it. The old pump had some contorted check valve / coupling joints (see picture) that needed to be replaced. Relatively easy to replace: Get the old one out of the pit. Remove hose clamps or hacksaw.. Check to see if there is a 'brick / block' in the pit to keep the pump a bit elevated and allow stones a place to collect. Need / buy: Pump, check valve, PVC to pump outlet adapter, 1 1/2" PVC pipe, PVC glue, coupling from new pump to existing plumbing. I used a rubber coupling (~ 6" long) used to join the 1 1/2" PVC ends. You can use a solid (glued PVC) fitting ~$2 or the rubber one I chose ~$5...How accurately can you measure / future replacement? Level it up, align the PVC discharge plumbing, clamp it in place. Overall a bit 'messy' job that will take ~2hours and save you a $300 plumber bill.
Date published: 2016-04-05
Rated 1 out of 5 by from 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.
Date published: 2014-03-11
Rated 4 out of 5 by from 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.
Date published: 2009-11-03
Rated 4 out of 5 by from 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.
Date published: 2014-01-04
Rated 5 out of 5 by from It really did the job Purchasing this sump pump was an emergency deal, the sump was already starting to overflow because the previous pump had failed. This pump was well displayed and recommended by a sales associate. The installation was incedibly easy, since I was attaching a flexible hose and placing it in a deep sump full of icy cold water. The capacity of the pump was great enough to empty the sump despide a heavy flow of rainwater into the sump. It ran almost constantly for several days as the water kept pouring in, and never gave any problems at all. Eventually the situation has stablized and it only has to run a few times every hour. The pump is very quiet, and does not make a noise when it stops or when it starts. So my customer is very pleaserd with my choice.
Date published: 2016-04-26
Rated 3 out of 5 by from 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.
Date published: 2008-03-20
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