The catch
Hoover SmartWash Pet Complete
Empty, it weighs about 20.5 pounds, so it's tougher to carry than PowerDash.
Side by side
Go with SmartWash if you want easier dosing and less weight to carry. Big Green is better for longer sessions, when the bigger tank is worth more to you than low weight.
Before you buy
Clean liquid capacity is 1 US gallon for SmartWash Pet Complete and 1.75 for Big Green Professional Carpet Cleaner. That is a gap of 96 fluid ounces, before recovery-tank limits come into play.
Where this comes from
128 US fluid ounces =1 US gallon. The capacities on record are 128 and 224 fl oz. Converting puts tank volume on one scale and says nothing about cleaning coverage.
The catch
Empty, it weighs about 20.5 pounds, so it's tougher to carry than PowerDash.
The catch
It's a heavy, commercial-style machine to haul around, and it claims a lot of closet space.


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SmartWash is the pick for easier dosing and a lighter machine to carry. Big Green fits longer cleaning sessions, where a larger tank counts for more than weight.
Hoover cuts down the handling work
Which one fits
The solution is mixed automatically on SmartWash, and the machine switches from application to extraction depending on which way you move. At about 20.5 pounds empty, it is also far easier to lift than Big Green.
The 75% advantage comes from its 1.75-gallon tank versus the one-gallon tank on the Hoover. What you gain is liquid capacity. Nothing promises 75% more cleaned area.
Empty, Big Green already weighs 42 pounds. If the manual allows it, move the machine to the cleaning area before adding water, and don't carry it filled unless you have to.
Big Green comes in at 42 pounds, SmartWash at 20.5. Big Green brings 0.75 gallon of extra clean capacity along with 21.5 pounds of additional empty weight.
In practice
Clean liquid capacity is 1 US gallon for SmartWash Pet Complete and 1.75 for Big Green Professional Carpet Cleaner. That is a gap of 96 fluid ounces, before recovery-tank limits come into play.
128 US fluid ounces =1 US gallon. The capacities on record are 128 and 224 fl oz. Converting puts tank volume on one scale and says nothing about cleaning coverage.
Filling the clean tank puts roughly 8.34 pounds of water weight on SmartWash Pet Complete and 14.59 pounds on Big Green Professional Carpet Cleaner. Follow the manual when you move and fill them.
Approximate water mass = clean capacity in US gallons ×8.34 lb/gal. Inputs 128/128 and 224/128 gallons. The real total shifts with formula concentration, leftover dirty water and tools.
Big Green comes in at 42 pounds, SmartWash at 20.5. Big Green brings 0.75 gallon of extra clean capacity along with 21.5 pounds of additional empty weight.
1.75 - 1 = 0.75 US gallon. 42 - 20.5 = 21.5 lb. 42 / 20.5 = 2.05.

Hoover, FH53000
On the forward pass this automatic upright washes, on the pullback it dries, and it meters the solution too.

BISSELL, 86T3
Large tanks, a long cord and a nine-foot attachment hose come on this heavy upright extractor.
Spec by spec
| Spec | Hoover SmartWash Pet Complete | BISSELL Big Green Professional Carpet Cleaner | In practice |
|---|---|---|---|
| Machine type | Upright | Upright | Using a spot cleaner in place of a whole-room upright is not efficient. |
| Nominal clean tank | 128 US fl oz | 224 US fl oz | Capacity does not promise area covered. |
| Empty weight | 20.5 lb | 42 lb | Weight goes up with water, tools and solution. |
| Hose | 8 ft | 9 ft | Look at exactly what the bundle contains, and at any model documentation that disagrees. |
| Power cord | 22 ft | 25 ft | Usable reach depends on outlet position. |
| Cleaning system | Automatic dosing and movement-based wet/dry operation | Eight-row brush, forward and backward cleaning | A feature list cannot name a winner without a matched cleaning test. |
Trade-offs
Decision guide
SmartWash is for easier dosing and a lighter machine to carry. Longer cleaning sessions, where tank size outweighs weight, favor Big Green.
The solution is mixed automatically on SmartWash, and the machine switches from application to extraction depending on which way you move. At about 20.5 pounds empty, it is also far easier to lift than Big Green.
The 75% advantage comes from its 1.75-gallon tank versus the one-gallon tank on the Hoover. What you gain is liquid capacity. Nothing promises 75% more cleaned area.
Empty, Big Green already weighs 42 pounds. If the manual allows it, move the machine to the cleaning area before adding water, and don't carry it filled unless you have to.
By the numbers
What we found across the carpet cleaners we compare, plus the checked facts behind each finding.
This guide keeps all 22 models in play. The pick rests on the facts and trade-offs on this page.
22 models fit, out of 22 checkedHow we countedNo needs are preselected here. Open the matcher and add the ones that apply to your home, room or setup.
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Hoover SmartWash Pet Complete | None of these needs is a documented match |
| |
| BISSELL Big Green Professional Carpet Cleaner | None of these needs is a documented match |
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Ready to buy
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