Best Upflush Toilets of 2026: Basement and Below-Grade Picks

The Saniflo SaniAccess 3 is the upflush toilet that experienced basement contractors install most reliably: a 1/2-HP macerator motor behind a standard elongated bowl delivers 15 feet of vertical lift and 150 feet of horizontal reach, using 1.28 GPF in a unit that thousands of homeowners have run for ten or more years with only routine maintenance.

Saniflo invented the category and the SaniAccess 3 is the company's flagship residential macerator toilet system sold as a complete package: elongated bowl, seat, and macerator unit. The macerator housing mounts directly to the back of the toilet base and connects to a standard 120V outlet. Discharge routes through a 3/4-inch pipe that can exit through the wall, floor, or ceiling depending on your drain routing. Installation does not require a licensed plumber in most jurisdictions, though local code varies, and the fact that no concrete cutting is needed means a typical DIY-capable homeowner can complete the installation in a day.

Long-term owner reports from homeowners using the SaniAccess 3 as the only bathroom in a finished basement describe consistent performance over five to twelve years with two primary maintenance events: annual cleaning with Saniflo-approved descaling solution and occasional impeller replacement after eight to ten years of heavy use. Owners report the motor hum during the 10-15 second pump cycle is audible through typical basement ceilings, which matters if a bedroom sits directly above. For most basement locations, this is not a practical problem.

Liberty Pumps AscentII is the upflush system most often specified when noise is a primary constraint: its insulated macerator housing and variable-start motor reduce the pump activation sound compared to standard macerator units, making it the top choice when a living space or bedroom sits directly above the below-grade bathroom.

Liberty Pumps is a U.S.-based pump manufacturer based in Bergen, New York, and the AscentII reflects that manufacturing pedigree: the motor and housing tolerances are tight, the rubber vibration isolation mounts are durable, and the company publishes detailed installation curves that show exactly how flow rate drops as head pressure increases. The toilet bowl supplied with the system is a standard elongated design with a comfort height of 17 inches, matching the ADA-compliant height of conventional comfort height gravity toilets from Kohler and American Standard.

The AscentII's defining feature is its noise profile. Standard macerator units emit a consistent hum at roughly 65 to 70 decibels during the pump cycle. Owner comparisons and installer reports consistently place the AscentII several decibels lower than the SaniAccess 3 at equivalent distances, a meaningful difference in a bedroom-over-basement scenario. The trade-off is that Liberty's parts network, while solid, is smaller than Saniflo's in terms of retail availability. For buyers where noise is secondary, the SaniAccess 3 is the better default. For buyers with sensitive neighbors or sleeping spaces directly above, the AscentII earns its premium.

The Saniflo SaniBEST Pro is the system that handles a complete below-grade bathroom, not just a toilet: its 1-HP grinder pump accepts effluent from a toilet, sink, shower, and laundry simultaneously, pushing everything up to 18 feet vertically and 200 feet horizontally through a 1.25-inch discharge pipe.

The SaniBEST Pro replaces the smaller macerator blade in residential units with a dual cutting system rated to handle cotton fiber, standard toilet paper, and non-woven materials that might enter a shower or laundry connection. The 1-HP motor runs on a 120V/20-amp dedicated circuit and the system accepts up to three additional fixture inlets, making it the correct specification when the basement bathroom will include a shower drain and a vanity sink in addition to the toilet. The discharge pipe increases to 1.25 inches to handle the combined flow without pressure loss.

Contractor and owner feedback on the SaniBEST Pro consistently highlights two realities: it is the most capable residential upflush system available for full bathroom use, and it is the loudest of Saniflo's residential range. The 1-HP motor's sound signature is noticeably more intense than the SaniAccess 3, which is a relevant factor if the basement bathroom is near a home office or media room. For ADU conversions where occupants expect a full functional bathroom and the pump can be located in a utility corner, the SaniBEST Pro is the correct specification, not an upgrade.

The Zoeller 915 is a contractor-grade upflush system with a 3/4-HP motor, 25-foot maximum vertical lift, and the cast iron pump housing that defines Zoeller's reputation in sump and sewage pump applications, making it the right choice when the project requires more head pressure than any residential macerator system provides.

Zoeller is best known for sump pumps and sewage ejector systems used by licensed plumbers in commercial construction, and the 915 reflects that context. Unlike macerator units that mount behind a toilet at floor level, the Zoeller 915 uses a submersible sewage ejector pump inside a 24-inch basin that requires a floor cutout. The toilet, sink, and other fixtures drain by gravity into the basin, and the pump ejects the collected waste when the float switch triggers. This is a fundamentally different installation approach from a macerator unit, requiring more construction work but delivering higher performance and a longer service life under heavy use.

The 3-year warranty is the longest in this category among manufacturer-backed units. Plumber forum consensus rates the Zoeller 915 as the most reliable option for projects where the macerator-style units cannot achieve the required lift, particularly in older homes where the basement floor may be 20 or more feet below the street-level drain connection. The 1.6 GPF rating is the one spec that works against it from an efficiency standpoint: EPA WaterSense requires 1.28 GPF or less, so the Zoeller does not qualify for WaterSense rebate programs available in many municipalities.

The Saniflo SaniCOMPACT 48 integrates the bowl, cistern, and macerator into a single fixture with an 18.9-inch depth, making it the shortest-projection upflush toilet available and the only correct choice for below-grade half baths or closet conversions where floor space is severely constrained.

The SaniCOMPACT 48 is unusual in the upflush category because it eliminates the separate macerator housing behind the toilet. The macerator is built into the base of the toilet itself, so the discharge connects directly from the unit without a visible pump box. The result is a toilet that looks closer to a conventional wall-hung fixture than a basement upflush system. The dual-flush cistern delivers 1.28 GPF for solid waste and 0.8 GPF for liquid waste, putting it among the most water-efficient upflush options on the market.

The trade-off is vertical lift capacity. The SaniCOMPACT 48 is rated for 9 feet of vertical rise, which works in most standard 8-foot basement ceilings where the drain connection is one floor above. Deeper basements or installations requiring more complex routing will exceed this specification. Owner reports note that the integrated design simplifies installation significantly compared to separate bowl-and-macerator systems, though servicing the macerator requires more disassembly than accessing the rear-mounted unit on a SaniAccess 3. For tight half-bath conversions where the vertical lift is manageable, the SaniCOMPACT 48 delivers the cleanest installation aesthetics in the category.

The Grundfos SFA Saniplus is the European-designed macerator system that connects a toilet plus a sink, shower, or bathtub through a single 1/2-HP pump unit, offering multi-fixture capability at a lower price point than the SaniBEST Pro while covering most residential below-grade bathroom configurations.

Grundfos is the parent company of Saniplus and one of the world's largest pump manufacturers by volume, which provides supply chain assurance that smaller macerator brands cannot match. The Saniplus accepts inputs from a toilet, a lavatory sink (via a side inlet port), a shower or bathtub (via a second side inlet), making it suitable for a complete bathroom when the head pressure requirement stays within 14 feet. The macerator blade is a steel cutter wheel design similar to Saniflo's, rated for toilet paper and organic matter but not non-flushable wipes or hygiene products.

Owner reports from European and North American installations describe a quieter operating sound than the SaniBEST Pro for similar fixture configurations, attributed to the 1/2-HP versus 1-HP motor and Grundfos's motor isolation design. The 14-foot vertical lift specification is slightly less than Saniflo's SaniBEST Pro at comparable fixture load, which means the Saniplus is best suited to standard 8-to-9-foot basements rather than deep below-grade installations. For those projects, the SaniBEST Pro's higher head rating is worth the additional investment.

The American Standard 2887 combines a Saniflo macerator unit with American Standard's conventional elongated bowl styling, giving a below-grade bathroom the same familiar appearance as the American Standard toilets found throughout the rest of the home.

American Standard has partnered with Saniflo to offer this system, which uses Saniflo's proven macerator technology behind an American Standard bowl. The bowl itself features the same vitreous china construction and elongated shape as American Standard's above-grade models, including the brand's EverClean antimicrobial surface treatment that inhibits the growth of stain and odor-causing bacteria on the bowl surface. The toilet seat ships with the unit and matches American Standard's standard seat mounting dimensions.

The lower maximum vertical lift of 12 feet compared to the SaniAccess 3's 15 feet is the primary specification difference, and for most standard 8-foot basements, this difference is not practically meaningful. Owner feedback emphasizes the visual result: a basement bathroom that does not look like a macerator installation. The visible pump housing behind the bowl is smaller than on standalone Saniflo units, and the American Standard bowl styling blends with adjacent bathrooms better than the dedicated Saniflo bowl.

The Saniflo SaniTop 01 is the macerator-only unit that connects to any existing toilet without replacing the bowl, making it the lowest-cost entry point for a below-grade bathroom when a toilet is already installed but lacks a viable gravity drain connection.

The SaniTop 01 sits on top of the toilet outlet and replaces the toilet's normal drain connection. When the toilet flushes, the water and waste flow down into the SaniTop's macerator chamber, where a 1/3-HP motor grinds the material and pumps it out through a 3/4-inch discharge pipe. The unit adds approximately 1.5 inches of height to the toilet seat position, which most owners describe as negligible in practice. Because it accepts any standard toilet outlet, homeowners can use it with a TOTO Drake, Kohler Highline, or any other conventional toilet already in the space.

The 9-foot vertical lift and smaller 1/3-HP motor make the SaniTop 01 the entry-level specification in Saniflo's lineup. Owner reports from rental property owners and basement conversions describe consistent performance at standard basement depths, with the caveat that the lower motor power means the unit should not be used for heavy commercial or very high-frequency residential use. For a standard single-toilet installation in a basement home office, workshop, or utility area, it is an effective and economical solution.