Best Dehumidifier With a Pump: Built-In, Separate Pump or Gravity

Our default is the Midea Cube 50 Pint on a separate condensate pump, with two built-in options for basements where that setup doesn't fit. The reason anyone needs a pump starts with the bucket. Honeywell's TPFIT50PWK is certified to remove 49.66 pints a day into a 14-pint tank, so at its rated pace the tank fills in under 7 hours. Frigidaire's FHDP5033Y1 does a little better with a 1.9-gallon bucket, about 7.3 hours. That's three or more trips a day in a wet July, and a full tank stops the machine until you come back. A pump, built in or bolted on, is how a basement dehumidifier runs around the clock.

There are three ways to set it up: a pump inside the dehumidifier, a separate condensate pump on the floor beside it, or no pump at all because the unit sits higher than the drain. All three work. Built-in pumps mostly do their job, though few owners say for how long and many report a year or less; 19 owners report one that works and three report built-in pumps dying, one owner three times in ten years. The failures weigh more than that count suggests, because a dead internal pump takes the dehumidifier off duty with it. Separate pumps under a dehumidifier have a quieter record, one of them running since 2010.

Check for a downhill path before you buy a pump

Gravity costs nothing and never wears out. If a floor drain, sump pit or laundry standpipe sits lower than the dehumidifier's drain port, a hose is all you need. The manuals agree on what that hose needs: Frigidaire asks for a 1/2-inch or larger hose with no kinks or rises, hOmeLabs warns that hoses longer than 5 feet may not drain properly, and AlorAir wants at least 1 inch of fall for every 10 feet of run. Keep it short, wide and downhill all the way.

When the nearest drain is a laundry sink, lift the dehumidifier instead of the water. Put it on a shelf, a stand or a small table; one owner built a table from scrap wood so the hose reaches over the rim of a slop sink, and another sets the unit above the sump pit. A shelf has no motor, needs no outlet and can't quit in year two. Build it for the load, since the Cube 50 with pump weighs 41.54 pounds and the Honeywell 40.48, plus whatever water sits in the tank. In an open basement you can also move the unit to the drain instead of the other way around; the air mixes.

A sump pit makes a fine drain. Owners do it for decades, one for 35 years, and some like that it proves the sump pump still runs in dry months. At about 6 gallons a day for a 50-pint unit, the pit barely notices. A waste drain is slightly better, since water sitting in an open pit can evaporate back into the room. Three exceptions:

• Radon systems: if your sump lid is sealed as part of a radon mitigation system, don't cut a hole in it; talk to whoever installed the system first.
• Local rules: some localities bar condensate from the sewer, so check before you tie into a waste line.
• Washer standpipes: drop the hose into the open top rather than sealing it in.

Built-in pump or a separate condensate pump

A built-in pump means one box, one plug and one hose, and that simplicity counts for a lot. The trade is serviceability. When an internal pump dies, the dehumidifier either goes back to a bucket or goes in for repair. One owner whose Midea pump failed at about 18 months switched to a gravity hose; another, whose pump died on a six-year-old AlorAir Storm, found no replacement parts and cut a drain fitting into the reservoir. And the pump is never the part a warranty protects for long. Honeywell's extended term covers only the sealed system (compressor, evaporator, condenser and refrigerant tubing), so its pump gets the one-year term. Midea, Frigidaire and hOmeLabs give one year on the whole unit. AlorAir covers everything for two years, then refrigeration parts only. A separate pump is no better on paper: Little Giant warrants the VCMA-15 for 12 months.

A separate pump sits on the floor and takes the dehumidifier hose into its tank. The Little Giant VCMA-15ULS has a half-gallon tank, three inlets and a check valve on the outlet, and Little Giant rates it at 50 gallons an hour at 5 feet of lift and 25 at 10. A 50-pint day is about 6.2 gallons, so at 10 feet it pumps a full day's water in roughly 15 minutes. At its rated 60 watts, that's about 15 watt-hours a day. You'll read that a second pump adds to the electric bill; by those figures it adds almost nothing next to the dehumidifier itself, which Frigidaire rates at 470 watts for its pump model.

Two requirements come with it, both from Little Giant. The pump should be on its own circuit, with no other receptacles or equipment on that circuit, so it can't share the outlet the dehumidifier uses. If there's no spare circuit near the drain, that's a job for a licensed electrician. And its overflow switch is built to break a low-voltage control circuit when the water rises too high. A plug-in dehumidifier usually has no such circuit, so the switch can't stop it. Plan on a separate water alarm instead, since the pump doesn't come with one.

If a condensate pump already serves your furnace or air conditioner, it may have a free inlet. Some owners feed their dehumidifier into that existing pump, and one asked two HVAC technicians and a plumber, who all told them it was fine. The extra water can wear the pump sooner or mean more cleaning. If you go this route, leave any wiring on that pump's overflow switch exactly as the installer left it.

If a dedicated circuit is already there or cheap to add, buy a pumpless dehumidifier and a separate pump. No owner here reports a separate pump dying under a dehumidifier, though separate pumps do fail: our condensate pump guide covers a VCMA-15UL that quit at six months on a furnace. When one does, it's a common part you can swap yourself, and the dehumidifier keeps its job. If the circuit is the sticking point, buy the built-in pump and accept that it's a one-to-two-year part on paper.

What the lift numbers mean

Every maker states pump performance a little differently, and the wording matters:

Most basements need far less than any of those. Owners pump about 4 feet up to a washer standpipe and 6 feet up into a shower, and one verified more than 12 feet on a unit that has since left Amazon. A 4-foot climb to a sink rim is inside every published figure here. The number that bites is the run. Put the dehumidifier 20 feet across the basement from the sink and you've passed Frigidaire's 16.4-foot limit and the length of Honeywell's tube before the hose climbs an inch. Measure the full path, up the wall and along the joists, before you choose.

The same goes for a separate pump, with one difference: its flow falls off as the lift rises, down to nothing at 15 feet, instead of holding to a single maximum. Don't size from claims of 20-25 feet of vertical lift from an unnamed Little Giant; the VCMA-15 can't reach that.

Compare pint ratings at 65°F; the pump changes nothing

DOE moved portable dehumidifier testing from 80°F to 65°F and 60% relative humidity, with compliance required from June 13, 2019. ENERGY STAR's explanation is that cooler air holds less water, so the same machine will likely report a smaller capacity on the new test. Its rough conversion maps an old-test 50 to about 30 pints a day and an old 70 to about 40-45, with a caution that the actual change varies by model and the table is a rough guide.

Adding a pump doesn't cost capacity. ENERGY STAR certifies the Cube 50 at 49.67 pints a day with or without the pump, and Frigidaire's compact FHDD5033Y1 and its pump twin FHDP5033Y1 at 49.95 each. What separates the pump models is the test behind their numbers:

So the cheapest built-in pump among our picks, the hOmeLabs, is likely a 30-pint-class machine at basement conditions, roughly 40% less water a day than a current-test 50 if ENERGY STAR's table holds for it. That's fine for a moderately damp basement and a poor match for a wet one. Our hOmeLabs review covers the rating in detail.

The portables share a floor: the Cube, Honeywell, Frigidaire and hOmeLabs are all rated down to 41°F, and Midea warns that coils can frost below that. The HD55P is rated from 33°F, which is why it's the pump model for a basement or crawl space that gets cold.

Pump modes, alarms and what happens when a pump quits

A pump model doesn't always pump. Read the drain section of the manual before you count on it, because the behavior differs by brand:

• Midea Cube: the pump can't be used in Bucketless mode, and with PUMP switched on, the bucket fill level is fixed at step 4 and can't be changed. One Cube owner says the pump never takes the tank below half.
• AlorAir HD55P: it ships in gravity mode. A light on the panel shows when pump mode is on, so switch it over when you set it up.
• Honeywell TPFIT50PWK: the pump tube's 0.21-inch bore is less than half the gravity tube's 0.47 inch, so a kink or a tight bend chokes it.

Built-in pumps also tend to leave water behind, pumping down only an inch or two before the tank refills. That standing water is why the tank still needs a rinse now and then, which we cover below.

Plan for the day a pump stops. With a separate pump, the water ends up on the floor next to it, because the overflow switch has nothing to shut off on a plug-in dehumidifier. Water sensors are the guard: set the pump in a plastic tray with a sensor under it, or use a leak sensor that cuts power to the dehumidifier when it trips. A battery water alarm in a shallow tray is the cheap version, and it's what we'd add. If you want the Little Giant's switch connected to anything, have an electrician or HVAC tech do it; Little Giant's own listing says it takes basic wiring knowledge, and we don't give wiring steps.

The ducted units handle this best. AprilAire's E070 manual asks for the unit, and any condensate pump, to sit in or above a condensate pan when it's in or above a finished space, with a float switch in the pan or the pump's overflow wires set up to stop the unit on overflow. That's the standard a finished basement deserves, and a portable can't fully meet it.

Keep the drain line from freezing

In any climate that freezes, discharge to an indoor drain such as a sink, a standpipe or the sump. A pump makes it tempting to send the water outside through the rim joist, and some owners do, one into a planting bed through drip-irrigation tubing. The hOmeLabs manual says not to use its pump when the outdoor temperature is 32°F or below, because the water will freeze. Little Giant rates its pump for indoor use only. A pump's short bursts through small vinyl tubing can leave water standing in the line to freeze into a plug, and one installer calls sending it outside the worst option.

If the only route is outside, treat it as a warm-season setup and switch the hose to a bucket or an indoor drain before the first hard freeze. A frozen line leaves the pump nowhere to send the water.

Maintenance that keeps a pump setup running

• Rinse the tank. Because built-in pumps leave water in the bucket, empty it fully and rinse it every so often. Follow your manual's cleaning schedule, and do it sooner if the unit starts to smell.
• Clean the filter on the schedule in your manual. A clogged filter cuts airflow, and one owner who got about 12 years from a pump unit says cleaning the filter was all they did.
• Inspect the separate pump. Little Giant's manual asks you to inspect and test the condensate removal system every 6 months, more often in heavy use. Our Little Giant review covers what to clean: the tank, the float and the check valve. With it plugged back in, lift the float by hand, as the manual's test describes, to confirm it kicks on.
• Pull the cardboard insert. On a new Little Giant, the manual warns that leaving the cardboard insert in will cause the pump to overflow.
• Check the line. Look for kinks, sags and gunk in the discharge tube, especially Honeywell's narrow one, and check every so often that the pump itself hasn't clogged.
• Read the humidity across the room. A separate hygrometer away from the unit tells you if the pump has quietly stopped and the tank has filled, because the humidity will climb.

Which setup we'd buy

For a basement above 41°F with no drain below the unit and a dedicated circuit within reach, buy the pumpless Midea Cube 50 and a Little Giant VCMA-15ULS, and put a water alarm beside the pump. The Cube matches the best 50-pint portables on certified capacity, usually costs less, and our Cube review explains the one thing to check in its first week, the humidity reading.

With no spare circuit, buy the Honeywell TPFIT50PWK for its pump: a current-test 50 with 15 feet of lift. Its licensee says it's out of business and claims now go through a Honeywell Store form that excludes unauthorized sellers, so treat the warranty as a bonus at best. If it's priced too high, the hOmeLabs HME1004 is the cheaper built-in, as long as a 30-pint-class machine suits your basement. The Cube pump model would be our first built-in choice, but Amazon had only used units when we checked, and there was no Amazon listing for the Frigidaire FHDP5033Y1, so we do not link either. If you find the Cube pump model new from a store you trust, it's a good buy. The Frigidaire carries the same current-test rating, but our review counts six owners whose older Frigidaires died within about four years, one a pump model at two, on a one-year warranty, so we'd rank it behind the Cube.

For a basement or crawl space that drops below 41°F, the AlorAir Sentinel HD55P is the pump model rated for it, from 33°F. Measure your run first, since AlorAir publishes no lift figure, and size it below the 55 on the box. Our crawl space guide covers that job, and our basement dehumidifier guide covers sizing and humidity targets for every setup here.