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Little Green Max Pet SmartMix 38572 vs Little Green 1400B

Choose the Little Green Max Pet SmartMix 38572 for separate water and formula filling, automatic mixing and a selectable water-only Rinse mode. Choose the Little Green 1400B if you prefer its larger listed 48 oz clean tank and are comfortable mixing to the tank’s fill lines. The SmartMix model’s listed capacity is 32 oz; neither figure proves how much area you can clean.

Published by Pickoryx · Published 2026-10-05

Source checked 2026-10-05 20:18 UTC

Products compared

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The buying question

Would you rather have separate-compartment automatic dosing and a Rinse setting, or the larger published clean-tank capacity with manual solution preparation?

The 38572 automates mixing and offers a water-only Rinse setting, with a listed 32 oz clean tank. The 1400B has a listed 48 oz clean tank and asks you to add formula and water to marked lines.

Quick verdict

Choose BISSELL Little Green 1400B if

  • You prioritize the larger published clean-tank capacity.
  • Adding formula and water to marked lines is an acceptable part of setup.
View BISSELL Little Green 1400B on AmazonPaid link
When to skip: Skip paying extra for SmartMix if you would not use its dosing or Rinse controls. Skip either model for a surface that its manufacturer says should not be wet-cleaned.
When the recommendation changes
  • If you do not mind the manual filling routine, automatic mixing may add little value.
  • If clean-tank capacity is a priority, the 1400B has the larger published figure, but no tested refill or coverage advantage is established.
  • If either exact package includes an accessory you need, confirm its contents before purchase; tools vary by model and offer.

The differences that matter

Formula Preparation And Rinse Mode

BISSELL Little Green Max Pet SmartMix 38572

Fill water and formula into separate compartments. The machine meters formula into the water in its cleaning setting; selecting Rinse supplies water only.[2, 3]

BISSELL Little Green 1400B

Prepare the solution in the clean tank: the manual instructs adding formula to its marked line, then warm tap water to the water line.[5]

What this changes: Choose 38572 if avoiding a manually prepared formula-and-water batch and selecting a dedicated Rinse setting matter to your routine. Choose 1400B if filling to both marked lines is acceptable. SmartMix still requires filling the two compartments.[2, 3, 5]

The better fit depends on your priorities

Tank Refilling And After Use Tools

BISSELL Little Green Max Pet SmartMix 38572

BISSELL lists a 32 oz clean-tank capacity.[1]

BISSELL Little Green 1400B

BISSELL lists a 48 oz clean-tank capacity.[4]

What this changes: The 1400B fits a preference for the larger published clean-tank capacity; 38572 trades that capacity for its separate-compartment dosing setup. These specifications do not establish cleaning area, running time or how often either needs refilling.[1, 4]

The better fit depends on your priorities

Best for your routine

Avoiding manual solution mixing during setup

Best fit: BISSELL Little Green Max Pet SmartMix 38572

Based on listed features, not comparative testing.

38572 keeps water and formula separate and meters them during cleaning. You still fill both compartments and use a compatible formula.

View BISSELL Little Green Max Pet SmartMix 38572 on AmazonPaid link

Prioritizing the larger stated clean tank

Best fit: BISSELL Little Green 1400B

Based on listed features, not comparative testing.

The 1400B is listed at 48 oz versus 32 oz for 38572. Choose it for that capacity preference while accepting manual preparation; refill frequency has not been compared.

View BISSELL Little Green 1400B on AmazonPaid link

Value and trade-offs

One or both observed offers have eligibility conditions, so no unrestricted price difference is shown.

Any extra cost for SmartMix should be justified by its dosing and Rinse controls in your own routine. If those do not matter, the 1400B’s larger listed clean tank remains a concrete reason to consider it.

There is not enough price history here to assess purchase timing.

Limitations

  • Neither cleaner was tested hands-on. No winner is established for suction, stain removal, drying time, noise, reliability or total formula use.
  • Published clean-tank capacities are specifications, not measured coverage or runtime. They do not establish a refill count or a percentage improvement in cleaning area.
  • Included tools and trial formulas can vary. Confirm the exact package rather than assuming every compatible accessory is supplied.
  • Follow the exact 38572 SmartMix filling guide. Generic Little Green filling instructions describe a different preparation method. The mixing and Rinse controls do not replace dirty-tank and tool care.

Questions shoppers ask

Is the SmartMix Rinse setting the same as cleaning the hose afterward?

No. Rinse selects water-only cleaning at the machine. The tool’s cleanout function is a separate operation for the tool and hose. The 38572 guide still calls for emptying and rinsing the dirty tank and cleaning and drying the tools; 1400B also has after-use care.

Can I add any cleaner because SmartMix handles the ratio?

No. Use the formulas BISSELL specifies for the exact machine and follow its filling instructions. Automatic mixing does not make household cleaners or unsuitable fabrics compatible.

Methodology and sources

Compared preparing and dispensing cleaning solution separately from the stated clean-tank capacity. Checked care and surface restrictions as conditions of use.

AI helped organize the manufacturer information and draft this comparison. Neither cleaner was tested hands-on.

View 5 sources
  1. 1.BISSELL Little Green Max Pet SmartMix 38572BISSELL US · Official specifications · Source checked 2026-10-05 20:13 UTC
    Evidence used on this page
    • Model heading; SmartMix Technology; Clean Tank Capacity; surface-care FAQ: Identifies model 38572, automatic mixing, a water-only Rinse setting and a listed clean-tank capacity of 32 oz. Its exact SmartMix guide supplies the filling instructions.
  2. 2.Little Green Max Pet SmartMix: Getting StartedBISSELL US · Official specifications · Source checked 2026-10-05 20:13 UTC
    Evidence used on this page
    • Model list; Filling the SmartMix Tank; Cleaning with Your Machine; Emptying the Dirty Water Tank: Explicitly includes 38572. Describes filling separate water and formula compartments, automatic mixing, water-only Rinse and dirty-tank care; accessories vary by model.
  3. 3.Little Green Max Pet SmartMix 38572 User GuideBISSELL US · Official specifications · Source checked 2026-10-05 20:15 UTC
    Evidence used on this page
    • Cover; pp. 3–4 filling and modes; pp. 6–7 tank and tool care: The model-specific manual shows separate filling, the formula-and-water setting and Rinse. Cleaning the tool and hose is a separate after-use task; the dirty tank and tools still require care.
  4. 4.BISSELL Little Green 1400B Portable Carpet CleanerBISSELL US · Official specifications · Source checked 2026-10-05 20:14 UTC
    Evidence used on this page
    • Model heading; Clean Tank Capacity; Download Product Instructions: Lists the exact 1400B and a 48-ounce clean tank, and links the applicable manual. The page’s conflicting hose lengths are not used for this comparison.
  5. 5.BISSELL Little Green 3369 and 1400B User GuideBISSELL US · Official specifications · Source checked 2026-10-05 20:16 UTC
    Evidence used on this page
    • Cover; p. 4 filling; p. 5 upholstery precautions; pp. 6–7 after-cleaning care: Explicitly covers 1400B. Instructs adding formula to the formula line and warm tap water to the water line, with dirty-tank and tool cleaning after use. Box contents vary by model.

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