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

Rated 4.8 out of 5 by 105 reviewers.
Rated 4 out of 5 by Strong performer We use this vac in an auto shop and got 2 years out of the last one...pretty good for $150 price point...testing the warranty right now, but still worth second purchase August 25, 2015
Rated 5 out of 5 by Great Vacuum that does not kill your ears This is the second Rigid Wet/Dry Vacuum I have owned. I have been very happy with Rigid products and the Baffling on this system really helps with the constant use. I use this for sawdust collection of my Miter saw, and just general cleanup around the garage. August 24, 2015
Rated 5 out of 5 by Simple and Efficient I've only had the Vac a few days but it's definitely well priced and has power! I couldn't find a higher CFM (suction) rating on any other vac at any price, and somehow still relatively easy on the electric bill. A bit on the large size for home use, I am thinking maybe a size smaller would have been adiquate. BUt you know what they always say here in the good ole US of A, "Go BIG or go home" A+++ for the bucks August 24, 2015
Rated 5 out of 5 by A durable wet-dry vac that one can trust We are in the process of constructing a large fish pond. Our material supplier recommended that we purchase a 16 gallon Rigid vacuum to clean the bottom of our pond. It worked like it should. The suction was amazing, picking up soil and sediment from the bottom. I purchased a Rigid extension hose and the floor brush attachment which made the job much easier. One thing; you have to stop to empty the canister every 16 gallons, but going through this process leaves one with a job well done. August 24, 2015
Rated 5 out of 5 by Great shop vac! Easy to assemble, seems to be durable, lots of suction, relatively quiet. August 13, 2015
Rated 3 out of 5 by Front wheels need re-design.. Front wheels have trouble turning 360 degrees. This makes it very difficult to maneuver when rolling full of water. I expected more for the price charged. August 8, 2015
Rated 5 out of 5 by Works perfectly. We are a solid surface countertop fabricator. Recently we had a very difficult installation which required the countertop to be seamed, in the customers house, in three places. When solid surface countertop material is sanded the dust produced is very fine like talcum powder. We used a filter bag on the vacumn and hooked it to our sander. It worked flawlessly. No airborne dust from exhaust. Our customer was very happy. Excellent machine! August 5, 2015
Rated 5 out of 5 by Best wet dry vac I have owned, I replaced my shop/vac with this Ridgid brand. I had a five gallon and when I had plumbing problems I had to keep going back and forth to throw out the water. This baby not only holds 16 gallons but has cut my work time to two trips vs. any where between 10-14 trips I was doing with the other. Making a mess and opening and closing to throw water out no longer a problem with the port on bottom of this one. I like the power and ease of use. the handle make it easy to maneuver, any one who buys this will be pleased to have it. Already saved my son's apartment, 2 days after I bought it, his neighbor was out of town and something broke in his apartment. Water started seeping into his apartment, this got the job down once the water was shut off. Great for cars also. August 1, 2015
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3 Questions | 11 Answers

Product Q&A

 
 
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11 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
11 months ago
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Answer: 
CFM 203
9 months ago
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Michigan, USA
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Answer: 
203 cfm
9 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
8 months ago
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Hulett, WY 82720, USA
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Answer: 
1/203
8 months ago
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Madera, CA, USA
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Answer: 
20 pounds, maybe more. CFM 160
6 months ago
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Worthington Springs, FL, 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, 8 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, 8 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, 8 months ago
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Indiana, USA
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Answer: 
You are right it would lift water more like 10 ft.
6 months ago
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Langton, ON N0E, Canada
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4 months, 2 weeks 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
4 months, 1 week 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.
1 week, 2 days ago
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Richford, VT, USA
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