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  • Bosch 3931A-PB 120-Volt Wet/Dry Vacuum Cleaner
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Bosch 3931A-PB 120-Volt Wet/Dry Vacuum Cleaner

by Bosch

List Price: $1,118.00
Price: $571.99 & FREE Shipping. Details
You Save: $546.01 (49%)
Only 5 left in stock (more on the way).
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N/A
  • 4 modes of operation for maximum versatility: regular, power tool, Pulse-Clean, Pulse-Clean with power tool
  • Tank-only, plastic bag, paper bag, or slurry bag collection systems
  • Power broker dial allocates power between vacuum cleaner and connected power tool to optimize usage
  • Exclusive Pulse-Clean electromagnetic filter cleaning system shakes the dual filter cartridges
  • Filters sit above maximum dust or water accumulation height to help maintain maximum airflow and suction
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4 new from $571.99
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Frequently Bought Together

Bosch 3931A-PB 120-Volt Wet/Dry Vacuum Cleaner + Bosch Vacuum Dust Bags (Pack of 5) + Bosch VAC005 5-Meter Vacuum Hose 35mm
Price for all three: $634.99

Buy the selected items together


Product Information

Color: N/A
Technical Details
Part Number 3931A-PB
Product Dimensions27.6 x 24.9 x 19.3 inches
Item model number3931A-PB
ColorN/A
FinishN/A
Voltage120.00
Item Package Quantity1
Batteries Included?No
Warranty Description(1) Year -30 day money back guarantee
  
Additional Information
ASINB003UV90PM
Best Sellers Rank #175,217 in Home Improvement (See top 100)
Shipping Weight56.2 pounds (View shipping rates and policies)
ShippingThis item is also available for shipping to select countries outside the U.S.
Date First AvailableMay 9, 2010
  
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Product Description

Color: N/A

From the Manufacturer

Bosch's 3931A-PB wet/dry vacuum cleaner has 4 modes of operation for maximum versatility: regular, power tool, Pulse-Clean, and Pulse-Clean with power tool. The power broker dial allocates power between vacuum cleaner and connected power tool to optimize usage and the exclusive pulse-clean electromagnetic filter cleaning system shakes the dual filter cartridges.

Important Information

Bulb Voltage
120.00

Customer Questions & Answers

Customer Reviews

3.7 out of 5 stars
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See all 10 customer reviews
I especially like the hepa filter cleaning mode.
John W Russell
I've had this for several years and my two major problems are: The wand will not stay connected to the hose.
P. Sanzone
Anyway I recommend buying it and will buy it again if needed.
Arnaud T.

Most Helpful Customer Reviews

29 of 31 people found the following review helpful By kkaz on January 14, 2012
Color Name: N/A Verified Purchase
I purchased this vac together with the Bosch 1773AK 5-Inch Concrete Surfacing Grinder, extra hose, and a hose adapter. I was looking for a self-cleaning vac with a tool switch in order to increase productivity for my DIY sanding and grinding. To be clear: I am not a contractor, I just happen to be a tool affectionado, and I don't mind a high price if I could save myself some time as a result.
So, I had some gypsum wall patching to sand at my home, and two small concrete pads to clean from the old paint and mortar droppings. The idea seems wonderful: the operation of the grinder would switch the vac on and off and the vac would electrostatically clean its filters during the breaks, when the tool does not operate. How come all vacs on the market are not designed like that?
So instead of a separate $18 Craftsman Auto Switch (Item# 00924031000) and the $40 Oneida Molded DIY Dust Deputy Cyclone to attach to my shop vac (which would probably give it a similar functionality), I decided to get this $536 vacuum, hoping that Bosch engineers designing this tool might actually anticipated what a contractor or DIY may need, and I would get a complete all-in-one solution as a result.
Well, what a disappointment it turned out to be! The vac runs the pulse-cleaning mode with a startling DOO-DOO-DOO sound, but the filters after such cleaning operation are still full of dust. Tried several times, still no results. However, the sucking efficiency drops much slower than in my old vac (probably because the aggregate filter area is larger and the motor is twice as powerful).
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17 of 18 people found the following review helpful By dabotofus2 on December 14, 2010
Color Name: N/A
This thing is solidly built and powerful. Generally pleased - much nicer than the old Wet/Dry Vac that it replaced. Pretty quiet, although not as quiet as the reviews indicated. The bags are nice and hold a lot. Have not used the automatic turn-on feature with power tools.

Three nuisance problems:
(1) It's fairly easy to move with the high handle, but still gets caught on cords. My solutions was to buy the 15M hose and leave the vac mostly in place.
(2) The attachments are a little loose on the hose fitting. This is very minor.
(3) The hose diameter is small - no more than 1.5 inches ID at the fitting. Clogs relatively easily by small slivers of wood when hooked to router table. Have to occasionally clear to maintain vacuum strength.

More of a curiosity than a problem is that the hose tends to build up static when running continuously as dust collection for the router. After running a while the router shavings are attracted to the hose and stand out like fur, similar to iron filings on a magnet.

None of the above are more than minor nuisances. Would buy it again.
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4 of 4 people found the following review helpful By Timothy G. Blum on January 1, 2013
Color Name: N/A Verified Purchase
If you are interested in this vac, you probably know that it is in a class above (or several classes above) the normal Ridgid/Shop Vac selections you see on the shelves at your local home stores. The best vac to compare this one to is probably the Festool CT-36. I think opinions on which is better fall both ways. I personally bought the Bosch for the better (albeit still limited) availability of filters/bags and my experience with Bosch vs no experience with Festool. The power tool activation is a great convenience feature that most vacs in this class have, meaning you rarely will need an additional extension cord in many residential situations. The power gauge dial on the Bosch allows you to dial back the vac power if you start to blow breakers when your saw hits hard. Surprisingly, I use it mostly at full 11-amps and only have blown a breaker once or twice (tells you how much of thosee 15-amps you are using of your miter saw most of the time). Everything at this level of vac is more expensive, including bags and especially filters, but they last a fairly long time with responsible use (i.e. use the right bag type with the right material-plastic vs paper). I hand cleaned the filters once and use the shake feature all the time and am still on my first set. Also, I found long ago to always/whenever possible use a bag in my shop vac-it controls the dust much better and keeps the filter(s) much cleaner. That may be part of the problem for those complaining about dust because I have been astounded at how little dust this machine exhausts vs other vacs. The big handle and beefy construction is perfect for stacking tools on top of. I can verifiy that it can hold at least a hundred pounds without flinching, including a 2" Makita rotary hammer in the case and about 75 lbs of drill bits and anchors.Read more ›
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4 of 4 people found the following review helpful By Arnaud T. on January 23, 2012
Color Name: N/A Verified Purchase
I bought this vacuum for my garage and use it both to clean the place after working there and to minimize dust generation by connecting it to my tools.
I like it very much and use it a lot.
Overall this is a great product with just a few things not perfect, which gives it an overall 4 stars.

What I like:
* The plugging tool function and the available choice to use it or not (2 different settings).
* The adjustable power
* It moves around very easily, without effort

What could be better:
* Setting up the collection bag in it's chamber is a little bit of a delicate work. Could be more mindless.
* The vacuum hose has a small diameter (similar to a household vacuum). Which makes it easy to plug into hand tools but requires adapters (not provided) for any stationary tool. Given its small size it was probably designed to be used only with hand tools and to have a full size shop vacuum for the stationary one.
* There is no dedicated way to store on it the vacuum hose. It kind of holds by wrapping it around the handle bar but its not the most stable way.

Anyway I recommend buying it and will buy it again if needed.
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