The catch
BISSELL Little Green
With such a short attachment hose, you end up repositioning the body around a sofa or vehicle.
Side by side
A larger clean tank and manual solution control favor Little Green 1400B. Lighter carrying and automatic formula dosing favor Max Pet SmartMix.
Before you buy
Clean-liquid capacity is 0.38 US gallon for Little Green and 0.25 for Little Green Max Pet SmartMix. The gap between them is 16 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 48 and 32 fl oz. Converting puts tank volume on one scale and says nothing about cleaning coverage.
The catch
With such a short attachment hose, you end up repositioning the body around a sofa or vehicle.
The catch
A large sectional is too much for the 32-ounce tanks, which suit spot work.


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Little Green 1400B gives you a larger clean tank and manual control of the solution. Max Pet SmartMix offers lighter carrying and automatic formula dosing.
The original Little Green carries more clean liquid
Which one fits
Compared with the 32-ounce tank on the Max SmartMix, its 48-ounce tank is 50% larger. Longer spot work is where that counts, although your application technique decides the actual coverage.
At 8.2 pounds, the Max is lighter than the 1400B at 9.65. Automatic dosing earns its keep when a quick setup matters more than getting the most out of each fill.
Accessories listed on the 1400B official page may differ from the Amazon carton. Verify the rinse and stain tools in the package you pick instead of assuming that every Little Green bundle is identical.
On the lighter Max the clean tank is 32 ounces, while the 1400B has 48 ounces.
In practice
Clean-liquid capacity is 0.38 US gallon for Little Green and 0.25 for Little Green Max Pet SmartMix. The gap between them is 16 fluid ounces, before recovery-tank limits come into play.
128 US fluid ounces =1 US gallon. The capacities on record are 48 and 32 fl oz. Converting puts tank volume on one scale and says nothing about cleaning coverage.
Filling the clean tank puts roughly 3.13 pounds of water weight on Little Green and 2.08 pounds on Little Green Max Pet SmartMix. Follow the manual when you move and fill them.
Approximate water mass = clean capacity in US gallons ×8.34 lb/gal. Inputs 48/128 and 32/128 gallons. The real total shifts with formula concentration, leftover dirty water and tools.
On the lighter Max the clean tank is 32 ounces, while the 1400B has 48 ounces.
9.65 - 8.2 = 1.45 lb. 48 - 32 = 16 US fl oz. 16 / 48 × 100 = 33.3%, which is the drop in nominal clean volume.

BISSELL, 1400B
A well-known portable with a 48-ounce tank. You spray, scrub and extract directly on the spot.

BISSELL, 38572
Formula is metered automatically on this light portable, which also comes with a self-cleaning stain tool.
Spec by spec
| Spec | BISSELL Little Green | BISSELL Little Green Max Pet SmartMix | In practice |
|---|---|---|---|
| Machine type | Portable spot cleaner | Portable spot cleaner | Using a spot cleaner in place of a whole-room upright is not efficient. |
| Nominal clean tank | 48 US fl oz | 32 US fl oz | Capacity does not promise area covered. |
| Empty weight | 9.65 lb | 8.2 lb | Weight goes up with water, tools and solution. |
| Hose | Maker page conflicts between 4 and 4.5 ft | Check exact listing | Look at exactly what the bundle contains, and at any model documentation that disagrees. |
| Power cord | 15 ft | Check exact manual | Usable reach depends on outlet position. |
| Cleaning system | Manual solution mixing and hose extraction | SmartMix automatic formula dosing | A feature list cannot name a winner without a matched cleaning test. |
Trade-offs
Decision guide
If you want a larger clean tank and to control the solution yourself, choose Little Green 1400B. If lighter carrying and automatic formula dosing come first, choose Max Pet SmartMix.
Compared with the 32-ounce tank on the Max SmartMix, its 48-ounce tank is 50% larger. Longer spot work is where that counts, although your application technique decides the actual coverage.
At 8.2 pounds, the Max is lighter than the 1400B at 9.65. Automatic dosing earns its keep when a quick setup matters more than getting the most out of each fill.
Accessories listed on the 1400B official page may differ from the Amazon carton. Verify the rinse and stain tools in the package you pick instead of assuming that every Little Green bundle is identical.
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 |
|---|---|---|---|
| BISSELL Little Green | None of these needs is a documented match |
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| BISSELL Little Green Max Pet SmartMix | None of these needs is a documented match |
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Ready to buy
Open either model on Amazon for the current price, customer reviews and delivery options.

A longer stretch between fills matters
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The lighter portable cleaner appeals
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