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Model # WSS30V

Internet # 203448472

1/2 HP Battery Backup Sump Pump System

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

$342.91 / each


Model # WSS30V

Internet # 203448472

Wayne 1/2 HP Primary Sump and Battery Back-Up Pump System comes completely pre-assembled for quick and easy installation. Top suction primary sump pump design minimizes clogging and eliminates the need for a vent or weep hole in the installation. This heavy duty combination system requires a 40-Amp hour or 75-Amp hour deep cycle battery, for continuous operation when the power is out. Protect your home.

California residents: see  Proposition 65 information

  • Assembled in the US with foreign and domestic parts; top suction, durable, cast iron 1/2 HP primary pump with vertical float switch for automatic operation
  • High flow, corrosion-resistant, battery back-up pump with reliable reed float switch with battery box and charger
  • (2) heavy-duty check valves
  • Pre-assembled and preset for quick installation; simple drop-in installation
  • Designed for 15 in. Dia or larger sump basins
  • 120-Volt primary pump (CDU800)
  • 1/2 HP; max. flow rate is 4200 GPH; 3150 GPH at 10 ft. of discharge lift
  • Approximate on level @ 9 in. - off level @ 4 in.
  • High-capacity battery back-up pumps up to 3300 GPH at 0 ft.
  • 12-Volt back-up pump (ESP25)
  • Home Depot Protection Plan:

    Home Depot Protection Plan

Info & Guides

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Maximum Pumping Height (ft.) 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Switch-Off Height (in.) 
4 in 
Switch-On Height (in.) 
9 in 
Amperage (amps) 
Batteries Included 
Battery Back-Up 
Battery Life (hours) 
0 h 
Battery Type Required 
12 Volt 
Cord Length (ft.) 
Discharge Flow @ 0 ft. (gallons/hour) 
Discharge Flow @ 10 ft. (gallons/hour) 
Discharge Flow @ 15 ft. (gallons/hour) 
Horsepower (hp) 
1/2 hp 
Housing Material 
Maximum Working Temperature (F) 
Minimum working temperature (F) 
Number of Batteries Required 
Power Type Required 
AC or DC 
Product Weight (lb.) 
24 lb 
Pump Switch Type 
Sump Pump Outlet Diameter Type 
1-1/2 FPT 
Voltage (volts) 
Warranty / Certifications
Certifications and Listings 
SSPMA Certified 
Manufacturer Warranty 
5 Year Limited Warranty 


Rated 4.2 out of 5 by 19 reviewers.
Rated 5.0 out of 5.0 by pleased Only installed for one day, but so far so good. Simple installation, just drop in sump well, connect to lift pipe with clunkless check valve, which connects eaisly with rubber fittings. This unit is super quiet, both primary and back up. Works perfectly.Tested backup after installing by unplugging the unit and manually activating the back up float switch. Back up worked just fine and the alarm sounded like it is supposed to. So far I am extremely pleased with this unit. Will update this post in few months after the pumps have been in service for awhile. May 24, 2015
Rated 5.0 out of 5.0 by Works great. My previous sump pump was only five years old and worked fine, but I had a scare when the power out went out for 24 hours last year and my basement started flooding. So I wanted a battery backup unit, and after some searching decided that this combined primary/battery backup system was the easiest to install. It fit pretty easily into my sump. I attached a new pvc drain pipe (the old one was 1.25 inches and I needed 1.5 inch pipe), hooked up the electrical connections (I bought the battery separately, of course), filled it with water and both the primary pump and the battery backup pump worked perfectly. I didn't need to drill a hole in the pipe as some did to get rid of an air lock. Extremely quiet operation, if I wouldn't be standing next to it I would not hear it running. April 30, 2015
Rated 5.0 out of 5.0 by Installation went smooth Everything went well with this purchase except for 2 things. First the book/instructions were not for this specific model. There was a pump book and a backup pump book - not the combined unit. But I figured it out. The other problem was that the transformer/plug for the backup pump was not in the box. I called, and it came by Fedex the next day. We have had rain and both pumps work very well. April 21, 2015
Rated 5.0 out of 5.0 by Easy installation I wanted the ability to install a battery backup sump pump. With my current pump being over ten years old, I did not want to risk a failure on the main pump so I purchased the Wayne combo. I was very pleased that it came with a free upgrade to a stainless steel jacket on the main 1/2 HP pump. I removed the old unit at a hose clamp joint where the check valve was located. I removed the existing tube, measured and shortened it. I glued the PVC tube in place and connected my marine deep-cycle battery(previously purchased)Plugged in 3 plugs, connected the charger to the AC outlet and was in business in less than 1/2 hour. Tested the system both AC power and battery. Flawless, did it on the 4th of July and had plenty of time for cooking burgers and fireworks. July 16, 2013
Rated 5.0 out of 5.0 by so far so good This was a very easy installation for DIY . Its strange that THD doesn't carry this brand in their stores but sells it online only. So far so good, it runs extremely quiet. If you have installed a sump pump before you can practically ignore the instructions, ( they will confuse you ). Installation took me less than 30 minutes - closer to 20 minutes. March 8, 2015
Rated 5.0 out of 5.0 by Incredibly quiet! Very easy to install. Manufacturer supplied instructions were not very useful but the components are good quality and it doesn't require a Mechanical Engineering degree to figure out how all the parts are assembled. Main pump has performed flawlessly so far (knock on wood). The battery back-up pump has even been placed into service for about a 4-hour period. It too performed as intended. Had looked at this system and others like it for about 18 months. Wish I had moved to purchase and install sooner as the peace of mind this system affords is priceless. January 13, 2015
Rated 1.0 out of 5.0 by Don,t buy it!!!!!!!!!!! I bought the sump pump thinking that it was the solution to my basement floods. I have called 5 times to this company, I have sent photes and details of the problem trough e-mail. I always get a replacment backup pump, but it doesn't solve my problem.The backup pump doesn't work, yet every time I call they say i need a new pump. Doesn't this company know that there could be another problem then the backup pump? I'm disappointed! January 21, 2015
Rated 5.0 out of 5.0 by Easy install and well executed Pricey but I'll sleep better. Well executed assembly. Instructions are lacking for the "combo" set up but not difficult. Wayne makes good quality pumps. January 29, 2015
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