Gravity Drain vs Pump Ice Makers: What Is the Difference? (November 2026)

On this page (10 sections)

1. Quick verdict: which drain type should you buy?
2. Gravity drain vs pump: the two side by side
3. How does a gravity drain ice maker work?
4. How does a pump ice maker drain water?
5. Where can you install each type?
6. Which type is easier to install?
7. What about ice output and storage?
8. Which pump model fits your counter?
9. Who should buy each model?
10. Verdict: pump or gravity for your kitchen?

A gravity drain ice maker relies on the slope of the drain line and a low outlet, while a pump model pushes wastewater upward so it can reach a sink or standpipe. For most under counter spots without a floor drain, the pump model is the easier install.

The ice maker gravity drain vs pump choice shapes where the machine can go, how much plumbing you need and how you handle the water it melts. This comparison uses two EUHOMY under counter models to show the difference in practice.

Both machines make clear ice from a water supply. The deciding factor is what happens to the meltwater and wash water once it leaves the bin.

Quick verdict: which drain type should you buy?

Buy a pump model unless your ice maker can sit above a drain that water reaches by gravity. The EUHOMY Under Counter Ice Maker with Drain wins this comparison for most buyers because its external pump opens up placements a gravity unit can't reach.

Its pump moves water upward or across a longer run, which suits under counter installs where a floor drain is missing. That flexibility is the whole reason pump models exist.

A gravity unit still makes sense in a few setups. If your machine stands near a floor drain or a low wall outlet, water can leave on its own with no pump to clear or power.

The trade-off is simple: a pump adds a part and a power draw, but it removes the slope problem. A gravity drain has fewer parts, but it needs the outlet lower than the machine.

For a home kitchen, bar or café where the cabinet base has no drain, the pump model is the practical pick. Pick gravity only when the building already gives you a low drain point right where the ice maker will stand.

Gravity drain vs pump: the two side by side

The pump model drains water upward; the gravity model drains it downward. That single difference drives the installation, the plumbing and the placement limits of each unit.

Here is how the two EUHOMY machines line up on the specs that matter for this choice.

Both units here carry a pump, so this table compares two pump machines rather than a pump against a gravity model. The pump type is what separates them from a plain gravity-drain ice maker in the same cabinet class.

The first model pairs its external pump with 110 lb of daily ice and a 33 lb bin. The second uses an electric pump and fits standard-height cabinets and bars, with 100 lb per day and a 24 lb bin.

If you're weighing pump models against each other rather than drain types, our Igloo vs Frigidaire ice maker comparison covers a different pairing of countertop machines.

How does a gravity drain ice maker work?

A gravity drain ice maker sends wastewater out through a hose that must slope downward to an outlet lower than the machine. Water leaves because of the slope, not because anything pushes it.

The bin sits above the drain port. Meltwater and cleaning water flow to that port, then down the hose and out.

For the drain to work, the hose needs a continuous fall. A flat run, a low loop or an outlet at the same height as the machine traps water and causes backups.

That's why a gravity unit wants a floor drain, a low wall drain or a sink below the ice maker. Under a counter, the outlet usually has to sit at or near floor level.

A gravity drain has fewer moving parts. There's no pump to power or clear, so the drain is just a hose and a slope.

The catch is placement. You can't put the machine wherever the cabinet looks best if the drain can't fall away from it.

Plan the install around the drain, not the other way round.

How does a pump ice maker drain water?

A pump ice maker uses a small electric pump to lift wastewater and push it along the drain line, so the outlet can sit higher than the machine. The pump does the work that gravity can't.

The pump collects water and moves it up to a sink, a standpipe or a drain point at a set height. The machine's stated lift tells you how high and how far it can push.

This is the feature that makes pump models useful under counters. A floor drain isn't required, because the water can climb to a drain that's already in the room.

The EUHOMY Under Counter Ice Maker with Drain uses its external pump this way. It can drain upward or over longer distances, which suits spots where a floor drain is unavailable.

A pump model still needs a water supply line and a place for the hose to end. It also adds one part that needs to stay clear and powered.

The EUHOMY Under Counter Ice Maker takes the same idea into a cabinet-friendly body. Its electric pump helps keep the interior clean and allows flexible placement without a floor drain.

Where can you install each type?

Install a gravity model only where a drain sits lower than the ice maker; install a pump model almost anywhere you can run the hose to a drain point. The room, not the cabinet, decides whether gravity is even an option.

For a gravity unit, think about the floor first. Is there a floor drain, a low wall outlet or a sink basin below counter height?

If not, gravity drainage has nowhere to go. A pump model frees you from that check.

The outlet can be a sink, a standpipe or a drain line above the machine, as long as it's within the pump's lift. Under counter placement is where this matters most.

Cabinet bases rarely include a drain, and adding one is a plumbing job. A pump skips that work.

Freestanding spots near a utility sink also favor the pump. The machine can stand where it looks good and the hose can still reach the sink.

Gravity still wins in a garage or back room with a floor drain at the base of the wall. There, the slope is free and the drain already exists.

Which type is easier to install?

A pump model is usually the easier install when no drain exists, because you only need a water supply and a reachable outlet for the hose. A gravity unit needs the drain height and slope to be right before you start.

With a pump, the install steps are straightforward. Connect the water line, set the machine upright, run the drain hose up to a sink or standpipe and plug in the pump.

The pump's lift rating sets the limit. Plan the hose route within that height and keep bends gentle so water doesn't collect.

A gravity install adds a slope check. The drain outlet must be lower than the machine, and the hose must fall steadily to it.

A long flat run or a low loop causes trouble.

That often means adding a floor drain or a low wall connection, which is a bigger job than running a hose to a sink. It's the main reason pump models are common in under counter kitchens and bars.

Either way, the machine needs a water supply. Both EUHOMY models here require one, and both should stand upright for 24 hours before first use.

If your goal is simply to empty and clean a countertop unit, our guide on how to drain a countertop ice maker walks through the manual method.

What about ice output and storage?

The pump model with the larger bin makes more ice and holds more of it, while the compact pump unit trades capacity for a cabinet-friendly size. Output and storage matter once the drain question is settled.

The EUHOMY Under Counter Ice Maker with Drain makes up to 110 lb of clear ice per day and holds 33 lb in its bin. It delivers 45 cubes every 10 to 15 minutes, which suits a busy bar or café.

The compact EUHOMY Under Counter Ice Maker makes up to 100 lb per day and holds 24 lb. It produces 40 cubes every 10 to 18 minutes and fits standard-height cabinets and bars.

The gap is modest in daily terms but real over a long service. A 33 lb bin buffers a rush better than a 24 lb bin, and 110 lb per day leaves more headroom on a hot day.

Both units use a 24-hour timer and a one-touch self-clean cycle. The first model adds an upgraded water filter for clearer, drink-safe ice.

The first model also uses a 3-layer insulation system to slow melt. That helps the larger bin hold its ice between refills.

Our comparison of nugget ice vs crushed ice explains why clear cube output like these machines produce suits drinks differently than chewable nugget ice.

Which pump model fits your counter?

Choose the larger pump model for output and bin size, and the compact one for a standard cabinet fit. Both solve the drain problem; they differ in capacity and footprint.

The EUHOMY Under Counter Ice Maker with Drain is the pick for a busy bar, café or restaurant where ice demand is high. Its 110 lb daily output and 33 lb bin keep up during peak hours.

It measures 17.32 x 16.93 x 31.5 inches in depth, width and height. Check that depth against your counter before you commit.

The compact EUHOMY Under Counter Ice Maker suits a home kitchen, hotel or small café where cabinet height is fixed. Its built-in size of 14.96 x 18.47 x 33.99 inches, including adjustable feet, fits standard-height cabinets and bars.

It's narrower but taller than the larger model. Measure both height and width, since the compact unit trades width for height to slide into a cabinet bay.

Both can run freestanding as well as under counter. That gives you a fallback if the cabinet spot doesn't work out.

Who should buy each model?

Buy the larger pump model if ice volume leads your decision; buy the compact pump model if the cabinet fit comes first. Both are pump machines, so the drain setup is the same.

Choose the EUHOMY Under Counter Ice Maker with Drain for a bar, café or restaurant with steady demand. The 33 lb bin and 110 lb daily output carry you through service, and the water filter helps keep cubes clear.

Choose the compact EUHOMY Under Counter Ice Maker for a home kitchen or a small commercial spot with a tight cabinet. Its 24 lb bin and 100 lb daily output cover everyday use, and its built-in size fits standard cabinets.

Skip the larger model if your cabinet depth is short. Its deeper body may not clear a shallow counter run.

Skip the compact model if you expect rush-hour volume. The 24 lb bin fills faster and needs more frequent attention.

If you're still deciding between countertop styles rather than drain types, our Frigidaire nugget ice maker vs GE Opal comparison looks at two nugget machines.

Verdict: pump or gravity for your kitchen?

For most under counter spots, a pump model is the better buy because it drains where gravity can't. The ice maker gravity drain vs pump decision really comes down to whether your room already has a low drain point.

If it does, a gravity unit can work with fewer parts. If it doesn't, the pump model saves you a plumbing job and opens up cabinet placements that would otherwise be ruled out.

The EUHOMY Under Counter Ice Maker with Drain is our top pick for most readers. Its external pump drains upward or over a longer run, and its 110 lb daily output and 33 lb bin handle real demand.

The compact EUHOMY Under Counter Ice Maker is the pick when cabinet fit matters more than capacity. It still solves the drain problem, just with a smaller bin and a narrower body.

Pick the pump model for a kitchen, bar or café without a floor drain. Pick a gravity model only when the drain already sits lower than the machine and the hose can fall to it.

Frequently asked questions

Is a pump ice maker better than a gravity drain model?

A pump model is better when your drain outlet sits higher than the machine or far from a floor drain. A gravity model works well when the ice maker can sit above a low drain that water flows down to by itself.

Can I install a pump ice maker without a floor drain?

Yes. The pump pushes wastewater up to a sink, standpipe or other drain point, so a floor drain isn't required.

You still need a water supply line and a place for the drain hose to end.

Do pump ice makers need more maintenance?

The pump adds one more part to keep clear. Run the self-clean cycle on schedule and keep the drain line free of kinks.

Gravity drains have fewer moving parts but depend on a steady downward slope.

Which drain type works under a counter?

A pump model is the safer choice under a counter, because the drain can rise to a sink or standpipe. A gravity unit needs the outlet lower than the machine, which is hard to arrange inside a cabinet.