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 141 reviewers.
Rated 5 out of 5 This thing is a tank This shop vac is great. I used it for cleanup of a room renovation. I needed something to sucks up all the dust from tearing down plaster walls. This worked very well. I used the dust collection bags with the 5 layer hepa filter with no problems at all. I like that you have differnent filter options for whatever job you are doing. The sound muffler is also a nice touch. Not as loud as other shop vacs I've used. My only complaint is that it doesn't work too well on carpet with the attachments that came with it. I might have to make a trip to Home Depot to see if I can find a better attachment for that. All in all I love it! January 22, 2016
Rated 5 out of 5 by Great Job!!! This is a great product. Being on a cart makes it very easy to move around. January 18, 2016
Rated 4 out of 5 by Nice Vac good Power This is a really nice Vac haven't used it a bunch yet but the only complainant I have is when the noise filter is in the vac will start making a fluttery noise sound which is kinda of annoying. But other then that great power allot of attachments its going to work great for what I need it for. January 18, 2016
Rated 4 out of 5 by Gets the job done. Replaced an existing wet/dry vacuum (different brand) with the same capacity. I use it in my wood working shop for general cleaning and chip removal from my wood plainer. It does the job well with better results than its predecessor. My wife wanted the large wheels and handle so it would be easy to use to vacuum our vehicles. I doubled the hose length to better meet our needs. I gave it an average on durability because only time will tell if it lives up to my expectations. January 17, 2016
Rated 5 out of 5 by This product has great suction power. This product has great power. The noise level is very low. The cord is nice and long. The fine dust bag that can be purchased separately is a benefit to keeping the vac clean and it holds a large amount of dirt and dust. January 14, 2016
Rated 5 out of 5 by It really sucks--but in a good way. Since we just got it, I can't speak to it's longevity, but my first impression is favorable. I like the cart style handle (a lot) and it seems to have a ton of vacuum power. Time will tell if it holds up--but it looks very good so far. January 13, 2016
Rated 5 out of 5 by I don't like the hose that comes with the vacuum, it often comes disconnected and pinched off. Other than that this is an awesome vacuum If you get it I am sure you will agree that this vacuum has all the value, quality and features you would expect from any shop vacuum. Also this vacuum is particularly quiet compared to others I have used . January 10, 2016
Rated 5 out of 5 by Great value This wet/dry vac was simple to put together and is very powerful. It is pretty quiet also. Ridgid has a winner here. January 10, 2016
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3 Questions | 11 Answers

Product Q&A

 
 
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1 year, 4 months ago
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Salt Lake City, UT, USA
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Answer: 
CFM 203
1 year, 1 month ago
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Michigan, USA
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Answer: 
203 cfm
1 year, 1 month ago
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New York, United States
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Answer: 
1/203
1 year, 1 month ago
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Madera, CA, USA
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Answer: 
20 pounds, maybe more. CFM 160
11 months ago
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Worthington Springs, FL, USA
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Answer: 
200+ CFM and it will move 1 gallon of water a minute, this I have done myself
1 year, 1 month ago
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Hulett, WY 82720, 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
1 year, 4 months ago
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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.
2 years, 1 month 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
2 years 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.
2 years ago
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Indiana, USA
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Answer: 
You are right it would lift water more like 10 ft.
11 months ago
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Langton, ON N0E, Canada
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9 months 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
9 months ago
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Answer: 
I've got 16 Gallon Model # 1851 and it takes Vac Bag VF3502

I think they are usable on both models, but you'd still need to double check. Maybe Home Depots site or just call or email Rigid.
5 months ago
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Richford, VT, USA
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