Main trade-off
BISSELL Little Green HydroSteam
Steam is not permitted on every fabric or stain
Head-to-head
Choose Little Green 1400B when repeated carrying matters more than steam. Its estimated body-plus-full-clean-tank load is about 12.8 lb versus 17.2 lb for HydroSteam 3618. Choose 3618 when its steam modes are permitted for the intended surfaces and worth the extra load.
Before you choose
If the cleaner must go upstairs filled, the 3618 starts around 17.2 lb with its 64 oz clean tank full, against about 12.8 lb for the 1400B with 48 oz. That is roughly 4.4 lb more before accessories or recovered water. Choose 1400B when repeated lifting is the main constraint. Choose 3618 when a compatible steam job justifies the extra body and water weight. Carrying the machine empty and filling upstairs reduces both loads.
What this is based on
At 1 kg per liter of water, 64 fl oz adds 4.17 lb and 48 fl oz adds 3.13 lb. Totals use published empty weights of 13 and 9.65 lb, with recovery tanks empty.
Main trade-off
Steam is not permitted on every fabric or stain
Main trade-off
No onboard steam mode


Compare Little Green HydroSteam 3618 and 1400B for filled carrying weight, steam-permitted fabrics, portable spot work and tank capacity.
Compare a steam-capable portable with a materially lighter conventional extractor for repeated stair or car-interior carrying.
Winner by situation
The stated empty weights and water capacities give about 17.2 lb for 3618 and 12.8 lb for 1400B, excluding accessories and recovery liquid.
3618 has SteamWash, Wash and Steam modes. 1400B does not generate steam.
The empty bodies are 13 and 9.65 lb. 1400B is lighter by 3.35 lb, without establishing comfort for every user.
Use a permitted non-steam treatment. 3618 has Wash mode and 1400B is a conventional extractor. Follow the material and machine instructions.
What matters in practice
If the cleaner must go upstairs filled, the 3618 starts around 17.2 lb with its 64 oz clean tank full, against about 12.8 lb for the 1400B with 48 oz. That is roughly 4.4 lb more before accessories or recovered water. Choose 1400B when repeated lifting is the main constraint. Choose 3618 when a compatible steam job justifies the extra body and water weight. Carrying the machine empty and filling upstairs reduces both loads.
At 1 kg per liter of water, 64 fl oz adds 4.17 lb and 48 fl oz adds 3.13 lb. Totals use published empty weights of 13 and 9.65 lb, with recovery tanks empty.
The 3618's SteamWash, Wash and Steam modes offer an additional treatment choice, while the 1400B sprays, scrubs and extracts without steam. If your regular job is water-compatible upholstery that does not allow heat, the lighter 1400B is the straightforward choice. The 3618 remains useful for other surfaces where its manual and the material's care instructions allow steam. Do not transfer urine-mode advice from the separate 4123 upright merely because both products say HydroSteam.
The recommendation follows mode availability and material permission. It does not claim steam is always better for pet stains, that either machine sanitizes the fabric, or that the upright and portable share identical instructions.
The 3618 holds 64 oz of clean liquid, one-third more than the 1400B's 48 oz. That can reduce initial refilling for a larger portable job, but the 3618 also has a separate 51 oz recovery limit. Choose its capacity when it is useful enough to carry, and keep checking the recovery tank. Without matched liquid use and recovery measurements, neither cleaner can be promised a specific number of stairs per fill.
64 divided by 48 is 1.33. The 51 oz recovery tank is about 80 percent of the 3618 clean tank, so the two capacities are distinct constraints.

BISSELL, 3618
A portable extractor with steam, wash and steam-only modes for compatible surfaces.

BISSELL, 1400B
The familiar portable cleaner uses a 48-ounce tank and a direct spray, scrub and extract workflow.
Meaningful differences
| What changes | BISSELL Little Green HydroSteam | BISSELL Little Green | Why it matters |
|---|---|---|---|
| Empty weight | The empty machine weighs 13 lb. | The machine weighs 9.65 lb. | 3618 adds 3.35 lb before water or accessories. |
| Clean tank | The clean tank holds 64 fl oz and the recovery tank holds 51 fl oz. | The clean tank holds 48 fl oz. | More water increases both capacity and carrying load. |
| Treatment modes | The portable provides SteamWash, Wash and Steam modes. | The hose tool sprays solution, scrubs and extracts without an onboard steam mode. | Steam only matters on a surface that allows the chosen mode. |
| Portable cleaning role | It is a hose-based portable extractor for spots and compatible upholstery. | The hose tool sprays solution, scrubs and extracts without an onboard steam mode. | Both use attended hose tools rather than an upright floorhead. |
What you give up
Recommendation switch
Choose BISSELL Little Green HydroSteam. Carry a 64 oz clean supply for a larger portable job. Steam is not permitted on every fabric or stain.
Choose BISSELL Little Green. Use conventional extraction when steam is unnecessary. No onboard steam mode.
What matters in practice
What the facts say
Useful conclusions from the current carpet cleaners comparison, followed by the checked facts used to reach them.
| Product | Needs matched | Checked facts | Source records |
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| BISSELL Little Green HydroSteam |
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| BISSELL Little Green |
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Use steam modes where the surface and manual permit them
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