Model WD1851

Features

  • 6.5 Peak HP Motor – Powerful suction picks up about 1 gallon of water per second
  • Scroll Noise Reduction® is a patented feature that provides quiet operation by precisely controlling the flow of air through the vac
  • Sturdy Cart, Push Handle, & Large Rear Wheels act together allowing the vac to travel easily up & down steps and across rough terrain
  • Quick Release Accessory Storage Bag keeps accessories close at hand but is quickly removable to make emptying debris from drum quick and easy
  • 2-Piece Drum Provides improved, more rugged construction to meet the higher demands found on the job site
  • 3-layer Fine Dust Filter captures fine dust particles such as dry wall dust
  • 7' Dual-Flex® Locking Hose resists collapsing and adds 180˚ flexibility at both hose ends. Hose locks onto vac for uninterrupted cleaning
  • Large Carry Handle allows easy lifting of vac into service vehicle
  • Long 20’ Cord wraps neatly around carry handle
  • Powerful exhaust airstream can be directed through the vac hose to blow debris from garages, decks, and sidewalks

Specifications

Drum Size 16 Gallons (US)
Cord Length 20’
U.L. Listed Yes
Replacement Filters VF3502, VF5000, VF6000, VF7000
Accessory Size 2-1/2"
Shipping Weight 32.8 lbs.
Net Weight 28.2 lbs.

Motor

Peak HP 6.5
Air Watts 306
Voltage 120
CFM 203
Amps 12.0

Ordering Information

 
Catalog Number Model No. Description Weight
lb. kg
31693 WD1851  16 Gallon Contractor Wet/Dry Vac  32.8  14.90  Buy Now
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Rated 4.8 out of 5 by 96 reviewers.
Rated 5 out of 5 by Serious suction I purchased this vac for work, It does everything I could have asked it to do. It has plenty of power to clean up aggregates and other large solids as well as simply cleaning up dust. I use it with a belt/disc sander and it works great. It is big, and the attachments don't really all fit on board, but all in all it's everything that I wanted. July 28, 2015
Rated 5 out of 5 by I had no idea how nice this is. The best part of this product (model WD18510) is it's effect on my dog. My dog finds it extremely entertaining to watch. It's so powerful that if I leave the intake hose off and between the suction on one side and the exhaust on the other I can turn it on and it will literally pick up speed, like a jet powered car, as it rolls across the workshop floor. July 15, 2015
Rated 5 out of 5 by as I'm getting older the cart type wheels and hanbel to get it up and down steps This shop vac is half as loud as my old one. It has great suction better than my old one. The hose storage could be better and hose flexability. Would like a long 10 to 15 foot 1.5 inch hose hose with car cleaning attachments. July 14, 2015
Rated 5 out of 5 by works perfect Had a flooded basement, without this vacuum it would have taken me all day to remove the water but this product did the job in just a few hours. Great product. July 12, 2015
Rated 4 out of 5 by This products has the features I was looking for The vac has plenty of suction, sucked up water out of flooded carpets very well. That is all I have used it for so far.Really like the large back tires ,it makes it much easier to move when its full of water. July 4, 2015
Rated 4 out of 5 by More suction than standard home shop vac. Bought mainly for water clean up. Have only used once, but it really put my home 8-9 gal. Husky and Rigid vacs to shame. The only disadvantage I see so far is the hose length at 7'. That is why I scored it a 4 on ease of use. Think 8' should be minimum and 9-10' would be better yet. Can't say for sure how durable it is with only one use. Having wheels and handle makes is easy to get around and it's not too wide to fit down between shelves, etc. Drain on bottom also adds to ease of use. July 2, 2015
Rated 5 out of 5 by Good product, reliable Great Vacuum. Gets used daily for commercial business. Great company. June 30, 2015
Rated 5 out of 5 by Great Product Wonderful warranty. Intend to stick with Rigid whenever I can. June 29, 2015
  • 2015-07-31T16:12:45.849-05:00
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3 Questions | 10 Answers

Product Q&A

 
 
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10 months ago
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Salt Lake City, UT, USA
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Answer: 
Thank you for your interest in RIDGID!

The water lift of WD1851 is 47 inches while the suction power is 199 CFM.

If you have any further questions or concerns, feel free to call us at 1-800-4-RIDGID (1-800-474-3443) or you may send your email to [email protected]

Regards,
RIDGID
10 months ago
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Answer: 
CFM 203
8 months ago
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Michigan, USA
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Answer: 
203 cfm
8 months ago
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New York, United States
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Answer: 
200+ CFM and it will move 1 gallon of water a minute, this I have done myself
7 months ago
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Hulett, WY 82720, USA
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Answer: 
20 pounds, maybe more. CFM 160
5 months, 1 week ago
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Worthington Springs, FL, USA
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Answer: 
1/203
7 months ago
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Madera, CA, USA
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3 answers

Pressure

If a airwatts are 0.117354 * (CFM) * (inches water), then do I calculate correctly that this model no. WD1851 will lift water 12.8 inches high?

306 watts * (1/0.117354) * (1/203 CFM) = 12.8 inches of water

I feel like that number is way too low - I'm sure your product lifts water more than 1 foot high! I may have the calculation wrong or the pressure may be specified another way. What do the units of "G/h" mean?

Besides, it seems like an odd coincidence that this is almost exactly the inches for model WD4070 when the WD4070 is rated 5.0 peak HP and the model on this page is rated 6.5 peak HP.

Thank you for the help.
1 year, 7 months ago
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Indiana, USA
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Answer: 
According to our Product Manager, You need to first think of CFM and Inches of water lift in inches as two different and inversely related measurements. To maximize CFM, you need a wide open path with as little resistance as possible to move as much air as possible. To maximize inches of lift (or better recognize or measure) that flow of air needs to be restricted, or blocked. So to assume that our machines generate 203 CFM and 49 inches of lift at the same time is a miss-conception. The calculation you completed was “at 306 air watts and 203 CFM, what are the inches of lift being produced”… and the answer is 12.8. Essentially, you’ve identified the inches of lift at the rated max CFM and Air Watts. For example, if you solved for CFM at max inches (say 49) you get a really small CFM number, somewhere below .2 CFM. This is because at max inches (the hose is blocked) and there is “no” air moving through the hose.

We hope this helps. Have a good week ahead!

Thank you
RIDGID
1 year, 7 months ago
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Answer: 
Thank you, RIDGID! That really helped me understand how the pressure and CFM are related, and the calculation result of 12.8 inches makes sense now. I didn't realize the airwatts equation was NOT referring to "sealed" inches of water. Now I see why using sealed inches for calculating airwatts wouldn't make any sense.

You mentioned 49 inches a couple times. Is that the sealed lift this vacuum is rated for? If not, would you please share the max water lift rating?

Thank you again.
1 year, 7 months ago
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Indiana, USA
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Answer: 
You are right it would lift water more like 10 ft.
5 months, 3 weeks ago
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Langton, ON N0E, Canada
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3 months, 1 week ago
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Bakersfield, CA, USA
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Answer: 
Thank you for your interest in RIDGID!

Please confirm the exact model of your vac. The WD16650 model is not designed to hold a filter bag. But the product above is the model number WD1851 which is designed to accommodate a filter bag. If your vac is WD1851, the part number of the filter bag is VF3502.

If you have any further questions or concerns, feel free to call us at 1-800-4-RIDGID (1-800- 474-3443) or you may send your email to [email protected]

Regards,
RIDGID
3 months, 1 week ago
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