A dual trash can suits kitchens where separating recyclables, compost, or waste keeps your main bin from overflowing.
Dual trash cans solve a specific problem: two waste streams without two floor-standing bins taking up space. But picking one means balancing capacity, compartment split, and that overlooked detail—bag size. Here’s the short version.
Match Capacity to Your Kitchen’s Output
Total capacity is the first decision, but don’t stop there. A stated figure like “10.5 gallons” often means two compartments of roughly 5.25 gallons each—that’s the split that decides if the can fits your daily trash volume.
Options span a wide range. Small models like the Kohler K-31315 offer dual 3-gallon compartments (11 liters each) for light duty, while large step cans reach 12.2 gallons or more. The Kohler 82L Dual Bin tops out at 86.65 quarts—roughly 21.6 gallons—for heavy household use.
Estimate how often you empty your current trash. If daily, a compact unit around 8 gallons total works. If you rarely fill a full 13-gallon bag, a larger dual can near 12 gallons saves trips to the outdoor bin.
Compartment Splits: Equal or Purpose-Built?
Compartment split shapes sorting. Equal splits treat both sides the same—for trash plus recycling of similar volume. Uneven splits suit predictable waste: more room for general trash, less for recyclables.
Listings show both. The Kohler K-20956 step trash can splits evenly at dual 5.5-gallon compartments; a 2-pack of 10.5-gallon open-top bins divides evenly at 5.25 gallons per side. A 46L rectangular step can, listed at 12.2 gallons, offers generous equal halves for a busier kitchen. Some bins even support dry/wet separation, so think about what you actually generate.
Watch for the common mistake: shoppers grab a 10.5-gallon total can expecting a full-size bin, then discover each side holds barely half. Match the per-compartment number to your largest single waste stream.
Consider Bag Compatibility Before You Buy
Bag fit turns a good can into an annoying one—or vice versa. Manufacturers design each model around a specific liner size, which doesn’t always align with standard retail bags.
The Kohler K-31315 fits 2.5-gallon (9.5-liter) trash bags, a small size often sold in specialty packs. The K-20956 takes standard 13-gallon bags. Check the specification sheet before purchase.
Also note which models include liners. The 10.5-gallon stainless open-top dual ships with liners included, while some competitors require separate purchases. Removable inner buckets, like the 2 x 5.3-gallon model with soft-close lid, simplify emptying but add a cleaning step.
Check Footprint, Height, and Clearance
Dimensions matter more than capacity when the can lives under a counter or in a tight corner. Tall step cans need vertical clearance for the lid to open fully.
Consider these real measurements:
- Kohler K-20956 step can: 36″ H x 16-13/16″ W x 26-7/16″ D—the tallest common option, meant for open floor space.
- 46L rectangular step can: 25.7″ H x 19.8″ W x 12.8″ D—a slimmer profile for cabinet-side spots.
- 8-gallon step pedal bin: 21.26″ H x 14.76″ W x 17.72″ D—compact for smaller kitchens.
- 10.5-gallon open-top (2-pack): 24.8″ H x 16.54″ W x 10.04″ D—narrow footprint for tight gaps.
Measure the location, including lid swing space. An open-top can needs no headroom, but a step can’s lid rises well above its base. For doorways or overhangs, subtract clearance generously.
Opening Mechanisms, Materials, and the Final Fit
Your workflow dictates the lid style. Step-on pedals keep hands free for messy prep; open-top bins suit quick tosses; hinged or soft-close lids contain odors and quiet the slam. The 8-gallon step pedal bin offers both step-on activation and soft-close action, a popular combo.
Material affects durability and appearance. Stainless steel dominates the market: it resists fingerprints (with proper coating), handles moisture, and matches appliances. The black 30L+30L dual can with hinged lid uses stainless steel with odor filters for waste-heavy households.
Keep the unit indoors unless the listing says otherwise—most dual cans are for kitchen use, not garage or patio weather.
When comparing specific models, our roundup of top-rated dual trash cans breaks down the best options by capacity and features.
Kohler’s specification sheets confirm the need to verify every detail. As the manufacturer notes, “For the most current Specification Sheet, go to Kohler’s product page” to check the latest specs.
FAQs
How many gallons should a dual trash can be for a family of four?
A family of four typically needs 10 to 12 gallons total. Look for 5 to 6 gallons per side so neither compartment overflows before emptying. If you cook often or produce bulky recyclables, step up to the 46L/12.2-gallon class.
Are dual trash cans worth it compared to separate bins?
Yes, for space efficiency. A single dual can occupies roughly the footprint of one standard bin while handling two waste streams. You lose bin-moving flexibility, but gain cleaner kitchen flow. For small kitchens, the space savings alone justifies the switch.
Can I use any trash bag in a dual compartment can?
No. Each model is designed for a specific bag size. Oversized bags waste material; undersized ones tear or slip. Check the spec sheet—e.g., 13-gallon bags for the Kohler K-20956 or 2.5-gallon for the K-31315—and stock the correct liners.
References & Sources
- Kohler. “Dual-Compartment Step Trash Can Product Page.” Lists current specs, pricing, and bag size recommendations for the K-20956.
- Kohler. “K-20956 Specification Sheet (US-CA).” Documents the dual 5.5-gallon compartment layout and 13-gallon bag compatibility.
- Kohler. “K-31315 Specification Sheet (US-CA).” Details the dual 3-gallon compartments and 2.5-gallon bag fit.