The Axor Citterio Single Hole Faucet is what happens when a bathroom fixture decides it would rather be architecture. Designed in collaboration with Italian architect and designer Antonio Citterio, this premium faucet combines substantial geometric forms, flat reflective surfaces, and remarkably precise control. It does not whisper “builder-grade bathroom.” It calmly informs everyone that the vanity had a design consultant.

Looks alone, however, cannot wash toothpaste from a sink. A luxury bathroom faucet still needs reliable water control, sensible dimensions, durable internal components, and compatibility with the basin beneath it. The Citterio single-hole lineup addresses those practical concerns with a ceramic cartridge, an aerated 1.2-GPM stream, several height options, and recognized U.S. efficiency and plumbing certifications.

This guide examines the faucet’s design, performance, installation requirements, maintenance, value, and day-to-day ownership experience. It focuses primarily on the popular Axor Citterio 110 model 39010001, while also explaining how taller versions fit different sink styles.

What Is the Axor Citterio Single Hole Faucet?

The Axor Citterio is a deck-mounted, single-handle bathroom faucet from Axor, the luxury design brand associated with Hansgrohe. The original Citterio bathroom collection debuted in 2003 and has since expanded through updated handles, finishes, installation formats, and related collections such as Citterio E and Citterio C.

The standard Citterio single-hole model uses one mounting opening for the faucet body and one top-mounted lever to control both temperature and volume. Its form is notably more architectural than the slender tube-and-spout shape found on many contemporary faucets. A broad horizontal body projects over the sink, while the upright lever resembles a carefully positioned control fin.

Axor offers the single-hole faucet in multiple ComfortZone heights, including 110, 160, and 270 versions. The number broadly indicates the usable space beneath the outlet in millimeters. The shorter 110 model suits conventional undermount and drop-in basins, while taller versions provide additional clearance for above-counter or deeper designer bowls.

Axor Citterio 110 Specifications at a Glance

• Model: 39010001 in polished chrome
• Installation: Single-hole, deck-mounted
• Handle: Single joystick-style lever
• Maximum flow rate: 1.2 gallons per minute
• Spray type: Aerated stream
• Valve: Ceramic cartridge
• Spout reach: Approximately 4 1/8 inches
• Outlet height above deck: Approximately 4 3/8 inches
• Overall height: Approximately 9 inches
• Faucet material: Brass
• Drain: Pop-up drain assembly included
• Certifications: WaterSense, ADA compliant, and cUPC listed

The official installation documentation specifies a mounting-hole diameter of approximately 1 3/8 inches and a maximum mounting-surface thickness of 1 5/8 inches. The supplied hot and cold hoses are intended for 3/8-inch shutoff connections. These details are not glamorous, but neither is discovering that your stone countertop and expensive faucet are refusing to date.

Design: Bold Geometry Without Visual Noise

A Fixture That Behaves Like a Small Building

Antonio Citterio is known for combining architectural discipline with comfortable everyday use, and the faucet reflects that approach. Its horizontal body, sharply controlled transitions, and broad polished planes create a strong silhouette without decorative flourishes. There are no ornamental curls, faux-industrial bolts, or handles pretending to be antique plumbing equipment.

The design works especially well in bathrooms that mix contemporary and classic elements. It can sit comfortably beside veined marble, warm wood cabinetry, limestone, concrete, or large-format porcelain. Unlike an aggressively futuristic faucet, it does not require the rest of the room to resemble a spaceship lounge.

Flat surfaces catch and reflect light more dramatically than round tubes. In polished chrome, this makes the faucet appear almost jewel-like under vanity lighting. The same quality also means fingerprints and dried droplets can be more noticeable. Luxury, as usual, comes with a microfiber cloth hiding somewhere nearby.

Original Citterio vs. Citterio E and Citterio C

Shopping becomes confusing because “Citterio” now refers to several related Axor families. The original Axor Citterio has the most substantial, architectural appearance. Citterio E softens the geometry with rounded transitions and compact joystick controls. Citterio C is slimmer and more restrained, with softer contours, optional textured handle treatments, and resource-conscious features on selected models.

Buyers who want a bold centerpiece generally gravitate toward the original Citterio. Those seeking a lighter silhouette may prefer Citterio E or Citterio C. Always verify the complete collection name and model number before purchasing; product photos become surprisingly similar after the fifteenth chrome faucet tab is open.

Water Performance and Everyday Control

A 1.2-GPM Stream That Feels Deliberate

The faucet’s maximum 1.2-GPM flow rate is lower than the federal WaterSense ceiling traditionally applied to qualifying bathroom faucets. An aerator mixes air into the stream, making the water feel fuller while reducing total consumption. For handwashing, shaving, brushing teeth, and ordinary sink cleanup, the output should feel controlled rather than stingy.

According to the U.S. Environmental Protection Agency, WaterSense-labeled bathroom faucets use significantly less water than older 2.2-GPM fixtures while meeting performance requirements. The Citterio’s 1.2-GPM rating places it comfortably within the water-efficient category.

The stream exits at a slight angle, which makes basin pairing important. A faucet can have excellent engineering and still produce countertop confetti if the water strikes a shallow bowl directly on its drain cover. Before ordering, compare the spout reach and outlet height with the basin’s inner dimensions and drain position.

Joystick-Style Ceramic Cartridge

A ceramic cartridge controls water volume and temperature through the single lever. The movement is compact and precise, allowing quick adjustments with one hand. This is especially useful when your other hand is covered in shaving cream, facial cleanser, or whatever mysterious substance a child has carried into the bathroom.

The lever configuration also supports accessible operation. The model is listed as ADA compliant, meaning its control design meets applicable actuation requirements when incorporated into a properly designed accessible installation. The broader sink, counter height, reach range, and clear floor space still determine whether the complete bathroom is accessible; one compliant faucet cannot perform that entire job alone.

Choosing the Correct Faucet Height

ComfortZone 110

The Citterio 110 is the safest choice for a conventional undermount or inset bathroom sink. Its outlet sits roughly 4 3/8 inches above the mounting surface, providing comfortable handwashing clearance without placing the stream excessively high above the bowl.

ComfortZone 160

The 160 version adds clearance and visual presence. It can work with deeper basins, larger vanity tops, and certain semi-recessed sinks. It may also be more comfortable for filling small containers. Check where the stream lands, because extra height can increase splashing when paired with a shallow basin.

ComfortZone 270

The 270 is designed for vessel-basin applications where the faucet must rise above the rim. It creates a dramatic silhouette but requires the most careful planning. Measure the vessel’s rim height, interior depth, drain position, and distance from the faucet hole. A vessel faucet chosen by eye alone can transform an elegant vanity into a small indoor splash park.

Axor’s ComfortZone concept is intended to help match usable faucet clearance with the sink and the tasks performed beneath the spout. The right choice is not automatically the tallest or most expensive one; it is the model that sends water into the basin at a comfortable location.

Installation Requirements

The faucet is designed for a single mounting hole and includes flexible supply hoses and a pop-up drain assembly. The manufacturer recommends professional installation, particularly because luxury vanities often involve stone counters, imported basins, custom cabinetry, and extremely little enthusiasm for corrective drilling.

Before installation, confirm the following:

• The countertop or sink has a correctly sized mounting hole.
• The mounting surface does not exceed the specified thickness.
• The hot and cold shutoffs accept the included 3/8-inch connections.
• The cabinet provides enough room for the mounting hardware and drain linkage.
• The sink includes an overflow compatible with the supplied drain.
• The spout reach positions the stream inside the bowl rather than against its rear wall.

The included drain is intended for most lavatory sinks with an overflow, but it is not universal. Some stone, glass, vessel, or specialty basins require a different drain. Installers should also avoid twisting the supply hoses and should flush the hot and cold lines before reinstalling the aerator. The manufacturer’s instructions call for flushing the supplies for at least two minutes after connection.

Cleaning and Long-Term Maintenance

Polished chrome is durable and relatively easy to maintain, but the faucet’s broad flat surfaces advertise water spots more enthusiastically than a rounded fixture. Wiping it with a soft cloth after use is the simplest way to preserve the finish, especially in hard-water areas.

For routine cleaning, apply a mild product suitable for the specific finish to a soft cloth rather than spraying chemicals directly into joints and openings. Avoid abrasive pads, harsh acids, caustic cleaners, and products not intended for plated plumbing fixtures. Cleaning residue should be rinsed away thoroughly and the faucet dried afterward.

The outlet incorporates Axor’s QuickClean approach, using flexible material around the aerator area so light mineral deposits can be rubbed away. With hard water, regular gentle cleaning is much safer than waiting until the faucet develops a limestone helmet and attacking it with the strongest bottle under the sink.

Certifications and Build Quality

The Citterio 110 is listed as WaterSense certified, ADA compliant, cUPC listed, and compliant with applicable lead requirements. Ferguson identifies the faucet body as brass and confirms the 1.2-GPM aerated flow, ceramic joystick cartridge, included drain, and one-hole configuration.

A cUPC listing indicates that a plumbing product has been evaluated for compliance with applicable North American plumbing standards. It is more meaningful than a vague marketplace description claiming that a faucet is “premium quality,” a phrase that has been applied to everything from precision fixtures to objects that arrive with three washers and a prayer.

Advantages of the Axor Citterio Single Hole Faucet

• Distinctive design: Its architectural form becomes a focal point without relying on decorative excess.
• Precise one-handed operation: The joystick-style lever offers compact control of flow and temperature.
• Water efficiency: The 1.2-GPM aerated stream reduces consumption while remaining practical.
• Multiple heights: Buyers can match the faucet to standard, deep, or vessel basins.
• Recognized certifications: WaterSense, ADA, cUPC, and lead-compliance listings simplify specification.
• Coordinated collection: Matching bath, shower, and accessory products support a consistent room design.
• Service documentation: Technical drawings, installation instructions, and replacement-part information are available.

Potential Drawbacks

• Premium price: This is generally a four-figure faucet, not an economical weekend replacement.
• Visible water spots: Broad polished surfaces benefit from frequent wiping.
• No deck plate: It will not conveniently cover unused holes from an old widespread or centerset faucet.
• Careful basin matching required: Incorrect height or reach can cause splashing.
• Professional installation is sensible: The faucet itself is straightforward, but custom sinks and countertops create complications.
• Design commitment: Its strong visual identity may influence every other fixture selected for the room.

Is the Axor Citterio Worth the Price?

The answer depends on what the bathroom project is trying to achieve. From a purely functional perspective, many less expensive faucets can deliver water reliably at 1.2 GPM. The Citterio justifies its price through design pedigree, finish quality, substantial materials, coordinated product options, precise operation, and the ability to anchor an entire luxury bathroom concept.

It makes the most sense in a primary bathroom, high-end powder room, custom residence, boutique hospitality project, or renovation where fixtures are expected to remain visually relevant for many years. It makes less sense in a temporary remodel, rental refresh, or budget project where its price would force compromises on the sink, countertop, lighting, or waterproofing.

A faucet should not consume the budget needed to make the room function correctly. Once the fundamentals are covered, however, the Citterio can provide the type of detail that makes a bathroom feel intentionally designed rather than merely assembled.

Real-World Experience With the Axor Citterio Single Hole Faucet

Living with a faucet such as the Axor Citterio is less about discovering a secret water feature and more about repeatedly noticing small refinements. The lever requires little movement, so morning adjustments become quick and predictable. Once users learn the comfortable warm-water position, they tend to reach for it automatically. The ceramic mechanism feels controlled rather than loose, helping the faucet communicate quality through touch instead of relying entirely on its logo.

The aerated 1.2-GPM stream is well suited to bathroom routines. It provides enough volume for rinsing hands and clearing toothpaste without producing the aggressive blast associated with some older faucets. Filling a large bucket would take longer, but most people do not buy a sculptural vanity faucet because they regularly wash camping equipment in the powder room.

Basin compatibility has the biggest effect on the experience. With a properly sized undermount sink, the 110 model places the stream conveniently near the central working area. Hands fit beneath the outlet without knocking against the bowl, and ordinary splashing remains manageable. Pair the same faucet with a very shallow basin or an unusually exposed drain cover, and droplets may escape onto the counter. This is why dimensions matter more than showroom photographs.

The broad chrome surfaces create a polished, high-end appearance immediately after cleaning. They also reveal dried water marks under bright vanity lights. In a household where everyone wipes the faucet after use, it remains impressively crisp. In a household where towels are considered decorative objects that must never be touched, the chrome develops a light constellation of spots. Fortunately, a soft damp cloth followed by a dry one restores the finish quickly.

Guests are likely to notice the faucet because the body has more visual mass than a typical single-hole fixture. The design feels expensive without covering itself in ornament. In a restrained bathroom, it can become the main feature even when the vanity uses neutral materials. This makes it particularly effective in powder rooms, where a small number of strong details often creates more impact than filling every surface with décor.

Maintenance should be uneventful when the water supply is clean and the faucet receives gentle care. Light mineral buildup around the outlet can be removed regularly rather than allowed to harden. Keeping the product documentation and purchase receipt is wise, as is recording the exact model and finish. “Chrome Citterio faucet” may sound specific until a replacement component is needed and the collection reveals that it has enough relatives to organize a large family reunion.

The installation experience varies more than the ownership experience. Replacing an existing single-hole faucet with compatible shutoffs can be relatively direct. Installing one in a new stone vanity requires accurate drilling, adequate clearance below the deck, correct drain selection, and careful stream alignment. A professional plumber familiar with premium fixtures can usually prevent the small mistakes that become expensive when stone, custom cabinetry, and specialty sinks are involved.

Over time, the strongest argument for the Citterio is not that it performs an unusual task. It is that routine tasks feel considered. The lever has a deliberate motion, the stream looks orderly, and the faucet maintains a strong architectural presence even when the bathroom around it is quiet. Owners who value those details are more likely to feel that the premium was justified. Buyers who view a faucet strictly as a device for delivering hot and cold water may admire it while sensibly spending the difference elsewhere.

Final Verdict

The Axor Citterio Single Hole Faucet combines functional plumbing technology with the visual authority of a genuine design object. Its ceramic joystick cartridge, 1.2-GPM aerated flow, brass construction, multiple height options, and recognized certifications provide a serious technical foundation beneath the polished exterior.

The Citterio is not the universal answer to every bathroom renovation. It is expensive, it needs thoughtful basin pairing, and its reflective surfaces reward regular cleaning. In the right project, however, it delivers something ordinary fixtures rarely achieve: it makes turning on the water feel like part of the room’s architecture.

Note: Dimensions, finishes, pricing, included components, and warranty terms may vary by model number, market, and production revision. Confirm the exact Axor Citterio model, basin compatibility, and current manufacturer documentation before purchasing or modifying a countertop.

Product details were cross-checked against current Axor and Hansgrohe documentation, U.S. retailer specifications, EPA WaterSense guidance, ADA resources, and plumbing-certification information.