The catch
BISSELL Little Green HydroSteam
Not every fabric or stain allows steam
Side by side
Little Green 1400B is the better choice if repeated carrying matters more to you than steam. With a full clean tank, its estimated load is about 12.8 lb including the body, against 17.2 lb for HydroSteam 3618. The 3618 is the better choice if its steam modes are permitted on the surfaces you intend to clean and are worth the extra load.
Before you buy
When the cleaner has to go upstairs filled, the 3618 starts at around 17.2 lb with its 64 oz clean tank full, while the 1400B with 48 oz starts at about 12.8 lb. That makes it roughly 4.4 lb heavier, before accessories or recovered water. Pick the 1400B if repeated lifting is your main constraint. Pick the 3618 if a compatible steam job justifies the extra body and water weight. Either load drops when you carry the machine empty and fill it upstairs.
Where this comes from
Taking water at 1 kg per liter, 64 fl oz adds 4.17 lb and 48 fl oz adds 3.13 lb. The totals build on published empty weights of 13 and 9.65 lb, with the recovery tanks empty.
The catch
Not every fabric or stain allows steam
The catch
No built-in steam mode


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Filled carrying weight, steam-permitted fabrics, portable spot work and tank capacity, compared for Little Green HydroSteam 3618 and 1400B.
For repeated carrying up stairs or into a car interior, weigh a steam-capable portable against a clearly lighter conventional extractor.
Which one fits
Going by the stated empty weights and water capacities, the 3618 comes to about 17.2 lb and the 1400B to 12.8 lb, with accessories and recovery liquid left out.
3618 comes with SteamWash, Wash and Steam modes, while 1400B generates no steam.
Empty, the bodies weigh 13 and 9.65 lb. The 1400B is 3.35 lb lighter, which does not mean it is comfortable for every user.
Stick to a non-steam treatment that is permitted. The 3618 has a Wash mode, and the 1400B is a conventional extractor. Follow the instructions for the material and the machine.
In practice
When the cleaner has to go upstairs filled, the 3618 starts at around 17.2 lb with its 64 oz clean tank full, while the 1400B with 48 oz starts at about 12.8 lb. That makes it roughly 4.4 lb heavier, before accessories or recovered water. Pick the 1400B if repeated lifting is your main constraint. Pick the 3618 if a compatible steam job justifies the extra body and water weight. Either load drops when you carry the machine empty and fill it upstairs.
Taking water at 1 kg per liter, 64 fl oz adds 4.17 lb and 48 fl oz adds 3.13 lb. The totals build on published empty weights of 13 and 9.65 lb, with the recovery tanks empty.
SteamWash, Wash and Steam modes give the 3618 an extra treatment choice, whereas the 1400B sprays, scrubs and extracts with no steam. If your regular job is upholstery that tolerates water but not heat, the lighter 1400B is the straightforward pick. The 3618 stays useful on other surfaces where both its manual and the material's care instructions allow steam. Do not carry urine-mode advice over from the separate 4123 upright just because both products carry the HydroSteam name.
This recommendation is based on which modes exist and what the material permits. Nothing here says steam is always better for pet stains, that either machine sanitizes the fabric, or that the upright and the portable follow identical instructions.
At 64 oz of clean liquid, the 3618 holds one-third more than the 1400B's 48 oz. That can mean less refilling early in a larger portable job, but the 3618 also has its own 51 oz recovery limit. Go for the extra capacity when it is worth carrying, and keep an eye on the recovery tank. With no matched measurements of liquid use and recovery, neither cleaner can be promised a set number of stairs per fill.
64 divided by 48 comes to 1.33. The 51 oz recovery tank is about 80 percent of the 3618 clean tank, which makes the two capacities separate constraints.

BISSELL, 3618
For compatible surfaces, this portable extractor offers steam, wash and steam-only modes.

BISSELL, 1400B
A well-known portable with a 48-ounce tank. You spray, scrub and extract directly on the spot.
Spec by spec
| Spec | BISSELL Little Green HydroSteam | BISSELL Little Green | In practice |
|---|---|---|---|
| Empty weight | The empty machine weighs 13 lb. | The machine weighs 9.65 lb. | 3618 weighs 3.35 lb more 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. | Extra water raises the capacity and the load to carry together. |
| Treatment modes | The portable provides SteamWash, Wash and Steam modes. | The hose tool sprays solution, scrubs and extracts without an onboard steam mode. | Steam counts only where the surface allows the mode you choose. |
| 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. | Each works through hose tools you attend to, not an upright floorhead. |
Trade-offs
Change of plan
Go with BISSELL Little Green HydroSteam. For a larger portable job, bring a 64 oz clean supply. Not every fabric or stain allows steam.
Go with BISSELL Little Green. When steam is not needed, conventional extraction will do. There is no onboard steam mode.
Decision guide
When repeated carrying outweighs the appeal of steam, choose Little Green 1400B, whose estimated body-plus-full-clean-tank load is about 12.8 lb against 17.2 lb for HydroSteam 3618. If steam modes are permitted for the intended surfaces and justify the extra load, 3618 is the right call.
Say the cleaner has to go upstairs filled. The 3618 then comes in 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. When repeated lifting is the main constraint, go with the 1400B. When a compatible steam job justifies the extra body and water weight, go with the 3618. Either load drops if you carry the machine empty and fill it upstairs. At 1 kg per liter of water, 64 fl oz adds 4.17 lb and 48 fl oz adds 3.13 lb. The totals use published empty weights of 13 and 9.65 lb, with the recovery tanks empty.
SteamWash, Wash and Steam modes give the 3618 an additional treatment choice, whereas 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 stays useful on other surfaces, where its manual and the material's care instructions allow steam. Don't carry over urine-mode advice from the separate 4123 upright just because both products carry the HydroSteam name. The recommendation rests on which modes are available and what the material permits. It does not claim that steam is always better for pet stains, that either machine sanitizes the fabric, or that the upright and the portable share identical instructions.
At 64 oz of clean liquid, the 3618 holds one-third more than the 1400B's 48 oz. That can cut down the initial refilling on a larger portable job, but the 3618 also has a separate 51 oz recovery limit. Pick its capacity if it is useful enough to be worth carrying, and keep checking the recovery tank. Without matched measurements of liquid use and recovery, neither cleaner can be promised to do 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, which makes the two capacities distinct constraints.
By the numbers
What we found across the carpet cleaners we compare, plus the checked facts behind each finding.
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| BISSELL Little Green HydroSteam |
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| BISSELL Little Green |
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Ready to buy
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Steam modes are yours to use wherever the surface and manual allow them
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