Model comparisons

Steamfast SF-140 to SF-150: six discontinued mop differences

Steamfast's SF-140, SF-141, SF-142, SF-145, SF-147, and SF-150 are all discontinued upright mops, but the name alone hides meaningful changes in pole, refill, and included tools. This comparison is for identifying a machine you own or a precisely described secondhand listing; it is not a shortlist of currently available products.

Start with the fill system

The SF-140, SF-141, SF-142, and SF-145 use a small cap on the boiler itself. Their manuals list a 10-ounce maximum, about three minutes of heating, and about 12 minutes of continuous steam. They require the machine to be off and unplugged before opening the boiler, with a cooling interval after use; follow each exact manual's timing rather than assuming every model has the same minimum. The SF-147 and SF-150 instead have removable water tanks. Their guides list 12 ounces and roughly 30 seconds to begin steaming, but omit continuous-run time and carrying weight. Neither guide documents adding water while the mop is steaming.

The older boiler models offer more numeric detail, but not a refill-on-the-go system. The newer tank arrangement is easier to carry to a sink, but unknown runtime and weight stay unknown. Neither arrangement makes every floor safe: read the floor-maker's care instructions and avoid surfaces the manual warns against.

Then check what is actually in the kit

• SF-140: telescoping pole, two pads and resting pad; carpet glider is listed as a separate optional purchase.
• SF-141: two pads and resting pad, plus a pole tilt lock; its manual does not list the extension lock or telescoping adjustment shown for SF-140/SF-142. Its carpet glider is optional.
• SF-142: telescoping pole and a carpet glider listed in the included accessories. The glider is a separate soft-surface setup, not an extractor.
• SF-145 Clean Mist: carpet glider, two pads, four floor lights, a separate solution tank, spray control, funnel, and listed Cleanfast solution, as well as the 10-ounce boiler.
• SF-147: removable tank, two pads and resting pad; its guide does not document the automatic upright steam pause.
• SF-150: a separate exact guide documents the removable tank, two pads, resting pad, and an Auto Steam Shut-Off while upright. Neither model’s exact guide lists a carpet glider or handheld tools.

A box or seller bundle may have lost parts. A manual's full kit list is more reliable than a product image showing a collection of tools, and a separately sold accessory should not be treated as supplied.

One unusual split: the SF-145 solution circuit

The SF-145 has a distinct tank for Cleanfast HARD FLOOR Solution, up to 6.75 ounces, with a foot-operated burst spray ahead of the mop. Water belongs in the 10-ounce boiler; the manual warns not to put solution there. Four LEDs illuminate the area in front of the powered head. The lights do not adjust steam or establish a dirt-detection feature. When using the glider, that is a separate soft-surface setup, not the solution-spray floor pass.

Choose by the limitation you can live with

For a basic floor-pad routine, the SF-140 is simple but uses a cap-refill and does not include its optional glider. The SF-141 shares the small boiler pattern but has the upright parking Tilt Lock and optional glider. The SF-142 is the clearest choice among these historical models if the original box must include a carpet-glider setup. The SF-145 adds a separate solution spray and front lights at the cost of more controls and a second liquid reservoir. SF-147 and SF-150 use a removable water tank, but only the exact SF-150 guide documents an automatic steam pause while upright; both are pad-only floor configurations in the documentation.

All six guides warn about heat and moisture on unsealed hardwood or unglazed ceramic and caution about waxed floors and leaving a hot mop in one place. A glider does not recover dirt or authorize steaming every rug. Steamfast marks these models discontinued, so verify the exact label, working condition, pad/glider availability, and seller's included parts before evaluating a used unit. If you need a current package, compare the separate SF-275 canister or the current-reference McCulloch machines rather than assuming one of these mop manuals describes a current successor.