Labonco FlaskScrubber Glassware Washer - 4420321

Labconco FlaskScrubber 4420321 Undercounter Laboratory Glassware Washer

The Labconco FlaskScrubber 4420321 Undercounter Glassware Washer is a high-performance laboratory washing system designed specifically for narrow-neck flasks, bottles, graduated cylinders, general laboratory glassware, and reusable labware. Featuring a 36-position direct-injection spindle rack, wash temperatures up to 93°C / 199°F, steam-assisted cleaning, programmable purified-water rinses, and forced-air drying through the spindles, the FlaskScrubber 4420321 provides laboratories with a highly effective and repeatable alternative to hand washing.

Unlike conventional laboratory washers that rely primarily on rotating spray arms, the FlaskScrubber directs wash water, detergent, rinse water, and drying air through individual spindles positioned inside narrow-neck vessels. This direct-injection design allows the system to reach internal flask and bottle surfaces that can be difficult to clean thoroughly with external spray alone.

The 4420321 is the 208/230V high-temperature version of Labconco's standard undercounter FlaskScrubber. Its wash water can reach approximately 93°C / 199°F, providing more aggressive cleaning and sanitizing capability than the corresponding 115V model.

A built-in steam generator helps loosen dried laboratory residues, while the integrated purified-water pump supports up to six purified-water rinses for applications where residual minerals, ions, or detergent could affect subsequent laboratory work.

Following washing and rinsing, heated forced air is directed through both the chamber and spindle system to help dry the interior of narrow-neck glassware.

This used and reconditioned Labconco FlaskScrubber 4420321 from American Instrument Exchange is inspected, cleaned, and extensively operationally tested prior to shipment. AIE technicians run glassware washers repeatedly through their programmed cycles, repairing or replacing components as necessary. The unit includes a 90-day warranty from American Instrument Exchange.

Labconco FlaskScrubber 4420321 Key Features

• Undercounter laboratory glassware washer

• Labconco Catalog No. 4420321

• 208/230V high-temperature configuration

• Designed especially for narrow-neck glassware

• 36-position Type 304 stainless-steel spindle rack

• 36 detachable large spindles

• 18 glassware holders

• 36 adjustable clips

• 10 interchangeable small spindles

• Direct injection of wash and rinse water inside vessels

• Maximum wash temperature approximately 93°C / 199°F

• Built-in steam generator

• Integrated purified-water pump

• Up to six purified-water rinses

• Forced-air drying through chamber and spindles

• LCD information center

• Extensive factory-programmed wash cycles

• Two additional user-programmable cycles

• Delayed start up to eight hours

• Separate wash and drain pumps

• High-flow water recirculation

• Automatic drain pump

• Stainless-steel wash chamber

• Fine-mesh stainless-steel particle filter

• Optional upper spindle and standard racks

• Compact undercounter installation

• Used and reconditioned by American Instrument Exchange

• 90-day AIE warranty

Labconco FlaskScrubber 4420321 Overview

Laboratory glassware can appear visually clean while still carrying residues capable of affecting later experiments.

Potential contaminants include:

• Culture media

• Proteins

• Salts

• Buffers

• Sugars

• Lipids

• Detergent

• Minerals

• Chemicals

• Previous samples

Manual washing introduces additional variability because different technicians may use different amounts of detergent, different rinse times, different water temperatures, and different cleaning techniques.

The FlaskScrubber was developed to automate and standardize much of this process.

Programmable washing, high-temperature cleaning, steam treatment, purified-water rinsing, and forced-air drying allow laboratories to establish more repeatable cleaning protocols while reducing the amount of staff time devoted to routine glassware preparation.

Labconco FlaskScrubber 4420321 Key Specifications

Specification	Details
Manufacturer	Labconco
Product Line	FlaskScrubber
Catalog Number	4420321
Equipment Type	Undercounter Laboratory Glassware Washer
Primary Application	Narrow-neck and general laboratory glassware
Configuration	Standard undercounter, no viewing window
Lower Rack	36-position spindle rack
Large Spindles	36 detachable
Small Spindles	10 interchangeable
Glassware Holders	18
Adjustable Clips	36
Maximum Wash Temperature	93°C / 199°F
Steam Generator	Yes
Purified-Water Pump	Yes
Purified-Water Rinses	Up to 6
Drying System	Forced heated air through chamber and spindles
Control	LCD information center
User Programs	2 programmable cycles
Delayed Start	Up to 8 hours
Recirculation Flow, 50 Hz	Approx. 96 gal/min / 363 L/min
Recirculation Flow, 60 Hz	Approx. 112 gal/min / 424 L/min
Wash Pump	Dedicated
Drain Pump	Dedicated
Chamber Construction	Type 304 stainless steel
Viewing Window	No
Water Consumption	Approx. 3.4 gal / 13 L per fill
Hot Water Inlet	3/8-inch NPT female
Purified Water Inlet	3/8-inch hose barb
Electrical	208/230V, 50/60 Hz, single phase
Operating Current	Approx. 11–12 A depending documentation/configuration
Exterior Dimensions	Approx. 24.1"W x 27.4"D x 34.1–36.1"H
Interior Dimensions	Approx. 22.6"W x 21.3"D x 18.7"H
Manufacturer Shipping Weight	Approx. 206 lb.
AIE Listed Shipping Weight	Approx. 182 lb.
Condition	Used / Reconditioned
AIE Warranty	90 Days

Common Applications

The Labconco FlaskScrubber 4420321 is well suited for biotechnology, pharmaceutical research, microbiology, molecular biology, analytical chemistry, environmental testing, academic research, food science, fermentation work, quality control, media preparation, and other laboratories that routinely generate reusable glassware.

It is particularly valuable when a laboratory's workflow includes significant quantities of flasks, bottles, graduated cylinders, and other vessels with restricted openings.

Ideal Laboratory Types

The 4420321 is an excellent choice for biotechnology companies, pharmaceutical laboratories, university research facilities, analytical laboratories, microbiology groups, contract research organizations, environmental laboratories, food and beverage laboratories, fermentation facilities, industrial R&D groups, and centralized glassware-processing areas.

Its undercounter design is especially useful where laboratories want professional glassware-washing capability without sacrificing additional floor space.

Direct-Injection Spindle Washing

The defining feature of the FlaskScrubber is its direct-injection spindle system.

A conventional rotating spray arm may wash the outside of a narrow-neck flask effectively while only a limited amount of water reaches the vessel interior.

The FlaskScrubber solves this problem by placing a spindle directly inside the flask.

Pressurized wash solution travels upward through the spindle and into the vessel.

This directly exposes internal surfaces to cleaning solution and mechanical flushing.

The same principle is used during rinsing and drying.

Why Spindle Washing Matters

Narrow-neck laboratory vessels can be among the most time-consuming items to clean manually.

Residue can accumulate on:

• Flask bottoms

• Sidewalls

• Shoulders

• Bottle interiors

• Areas inaccessible to ordinary brushes

Direct spindle injection improves access to these areas while reducing the need for repetitive hand cleaning.

For laboratories washing dozens of Erlenmeyer flasks or media bottles per day, this can significantly reduce labor requirements.

36-Position Lower Spindle Rack

The included lower rack is constructed from Type 304 stainless steel.

It incorporates:

36 detachable large spindles

18 glassware holders

36 clips

and

10 additional interchangeable small spindles

This modular configuration allows laboratories to adapt the rack for different vessel sizes.

Unused spindle locations can be plugged so available flow and pressure are concentrated through active positions.

Narrow-Neck Glassware Applications

The 4420321 is particularly well suited for cleaning:

Erlenmeyer flasks
Volumetric flasks
Media bottles
Reagent bottles
Graduated cylinders
Culture vessels
Sample bottles
Digestion vessels
BOD bottles
Other narrow-neck laboratory containers

Appropriate spindle and holder selection depends on vessel dimensions.

General-Purpose Labware

The FlaskScrubber is not limited to flasks.

Optional standard racks, baskets, and inserts allow the machine to wash a variety of additional laboratory items.

These can include:

Beakers
Culture tubes
Petri dishes
Small bottles
Wide-mouth vessels
Funnels
Utensils
General reusable labware

This allows the washer to support both specialized narrow-neck washing and routine laboratory glassware processing.

High-Temperature 93°C Washing

One of the major advantages of the 4420321 is its high-temperature 208/230V configuration.

Wash water can reach approximately:

93°C / 199°F

Higher temperatures can improve cleaning by:

• Increasing detergent effectiveness

• Softening dried residues

• Helping dissolve fats and oils

• Loosening proteins and biological material

• Increasing sanitizing effect

• Improving subsequent drying

This makes the 4420321 especially attractive for laboratories with challenging contamination or demanding cleaning protocols.

4420321 vs. 4420320

The 4420321 and 4420320 are closely related undercounter FlaskScrubber models.

Both use the same general spindle-washing concept.

The primary distinction is electrical configuration and maximum wash temperature.

The 4420320 operates on:

115V

and reaches approximately:

82°C / 180°F

The 4420321 operates on:

208/230V

and reaches approximately:

93°C / 199°F

The 4420321 also provides additional high-intensity cleaning programs associated with the higher-voltage configuration.

Choose the 4420321 when maximum cleaning temperature and more aggressive wash programming are important.

Steam-Assisted Cleaning

The FlaskScrubber incorporates a built-in steam generator.

Hot vapor is introduced during appropriate cycle stages to help loosen dried residues before or during washing.

Steam can be particularly effective on materials such as:

• Dried culture media

• Sugars

• Salts

• Biological residues

• Proteinaceous material

• General dried laboratory contamination

Steam-assisted cleaning complements the mechanical action of hot water, detergent, and spindle injection.

High-Flow Recirculation

The high-voltage FlaskScrubber provides substantial water recirculation.

At 230V and 60 Hz, manufacturer documentation lists approximately:

112 gallons per minute / 424 liters per minute

At 50 Hz, circulation is approximately:

96 gallons per minute / 363 liters per minute.

This high recirculation rate provides the mechanical force required for effective spray-arm and spindle cleaning.

The water is recirculated during appropriate portions of the cycle rather than continuously consumed at this rate.

Separate Wash and Drain Pumps

The FlaskScrubber uses separate pumps for:

washing

and

draining.

Separating these functions helps reduce the potential for dirty drain water to interact with the wash circulation system.

The dedicated drain pump can remove wastewater efficiently after each wash or rinse stage.

Purified-Water Rinsing

The 4420321 incorporates a dedicated purified-water pump.

Up to six purified-water rinses can be incorporated into a cleaning program.

Purified-water rinses are useful when dissolved minerals or ions from ordinary tap water could interfere with subsequent laboratory work.

Possible tap-water residues include:

• Calcium

• Magnesium

• Sodium

• Chloride

• Silicates

• Other dissolved solids

Using purified water during final rinse stages can help leave glassware with less mineral residue.

Applications That Benefit from Pure-Water Rinsing

Purified-water final rinses can be especially valuable for:

Analytical chemistry
Trace analysis
Protein research
Buffer preparation
Cell-culture support
Pharmaceutical research
Environmental analysis
Sensitive assays

The required rinse-water purity should be selected according to the laboratory's downstream analytical requirements.

Built-In Purified-Water Pump

The integrated purified-water pump allows the washer to draw from either appropriate pressurized or non-pressurized purified-water supplies.

This can simplify installation where DI or RO water is stored in a reservoir rather than supplied under building pressure.

Adequate flow and available volume must still be provided for the selected cycle.

Forced-Air Drying

After washing and rinsing, the FlaskScrubber automatically dries compatible glassware with heated forced air.

Automated drying reduces the need to:

• Transfer wet glassware to drying racks

• Leave vessels inverted overnight

• Use separate drying ovens

• Manually blow out narrow-neck glassware

This can improve throughput in busy laboratories.

Drying Through the Spindles

One of the most important FlaskScrubber features is the ability to direct drying air through the same spindles used for washing.

Narrow-neck vessels often retain moisture long after their exterior surfaces are dry.

Warm air introduced directly inside the vessel helps remove trapped moisture more efficiently.

This is especially helpful for:

Erlenmeyer flasks
Media bottles
Graduated cylinders
Volumetric flasks
Tall sample bottles

LCD Information Center

The 4420321 uses an LCD information center for selecting and monitoring wash programs.

Operators can view information such as:

• Cycle status

• Internal water temperature

• Program selection

• Alarm conditions

• User-set parameters

This generation predates the touchscreen-based CleanWorks interface of the newer Vantage series but still provides substantial programming flexibility.

Factory-Programmed Cycles

Labconco equipped the high-voltage FlaskScrubber with a broad range of factory programs.

Programs include:

Rinse Only

Plastic

Glass

Glass Plus

Science

Science Plus

Dry Only

and, on the 208/230V models:

Intense

Intense Plus

Extreme

The additional intensive programs take advantage of the higher-temperature capability of the 230V configuration.

Two User-Programmable Cycles

In addition to factory programming, the 4420321 provides two user-defined cycle positions.

This allows laboratories to create cleaning procedures tailored to specific types of glassware or contamination.

For example, separate protocols could be developed for:

Culture flasks
Analytical glassware
Media bottles
Protein-research glassware
General laboratory vessels

Saved programs can help reduce operator-to-operator variability.

Delayed Start

The FlaskScrubber allows cycle startup to be delayed by up to approximately eight hours.

This can be useful when laboratories want washing to occur:

• After normal work hours

• Overnight

• Before staff arrive

• During periods of lower utility demand

In centralized glassware-processing facilities, delayed start can improve scheduling flexibility.

Operating Alarms

The system monitors several operating conditions and can display alarms or warning messages.

These may include conditions associated with:

• Hot glassware

• Low water

• High water

• Overflow

• Detergent

• Rinse aid

• Drain failure

• Low temperature

Diagnostic messages help operators identify incomplete cycles or problems requiring service.

Stainless-Steel Construction

The FlaskScrubber uses Type 304 stainless steel throughout major wetted and structural areas.

This includes the wash chamber and spindle rack.

Stainless steel provides:

• Durability

• Corrosion resistance

• Easy cleaning

• Resistance to repeated hot-water exposure

• Compatibility with appropriate laboratory detergents

Fine-Mesh Drain Filter

A removable fine-mesh stainless-steel filter captures larger debris before it reaches downstream components.

Routine cleaning of this filter helps preserve:

• Proper drainage

• Pump performance

• Water circulation

• Cleaning efficiency

The filter can be accessed for routine maintenance.

Undercounter Installation

The 4420321 is specifically designed as an undercounter laboratory glassware washer.

Its external dimensions are approximately:

24.1"W x 27.4"D x 34.1–36.1"H

This allows the washer to fit beneath appropriately designed laboratory casework.

The adjustable height provides flexibility for leveling and integration with different counter heights.

Space-Saving Laboratory Design

Undercounter installation has a practical advantage in crowded laboratories.

A freestanding glassware washer occupies dedicated floor space.

The 4420321 can instead use the area beneath a laboratory bench or counter.

This makes it attractive for:

• Startup laboratories

• Academic labs

• Smaller research suites

• Renovated laboratory spaces

• Central glassware rooms with limited floor space

No Viewing Window

The 4420321 does not include a viewing window or interior light.

This is an important distinction from the 4420331, which is the corresponding high-voltage undercounter model equipped with a window.

For laboratories that do not need visual monitoring during wash cycles, the 4420321 provides the same core spindle-washing functionality without the window configuration.

4420321 vs. 4420331

Both models are undercounter, high-temperature 208/230V FlaskScrubbers.

The principal distinction is:

4420321 — no viewing window

4420331 — viewing window and interior light

Both provide direct-injection spindle washing and high-temperature cleaning.

The choice is primarily based on whether visual cycle monitoring is important to the laboratory.

4420321 vs. Freestanding FlaskScrubber

The 4420321 is designed for installation beneath laboratory casework.

A freestanding FlaskScrubber has finished stainless-steel sides and top so it can operate independently in an open laboratory space.

Choose the undercounter 4420321 when:

• Appropriate casework is available

• Floor space is limited

• A built-in appearance is preferred

Choose a freestanding FlaskScrubber when:

• No suitable undercounter location exists

• Greater relocation flexibility is desirable

• The washer must stand independently

4420321 vs. FlaskScrubber Vantage

The newer FlaskScrubber Vantage retains the same general narrow-neck spindle-washing concept but adds more advanced controls and monitoring.

Depending on configuration, Vantage features can include:

• Full-color touchscreen

• CleanWorks OS

• Large numbers of customizable programs

• Conductivity-monitored rinsing

• USB and Ethernet connectivity

• Remote monitoring

• Expanded documentation capability

• HEPA-filtered drying

The 4420321 is an earlier-generation machine but retains the core capabilities many laboratories need:

93°C high-temperature washing

36-position direct spindle injection

steam-assisted cleaning

purified-water rinsing

and

forced-air drying.

For laboratories that do not require the latest digital features, a refurbished 4420321 can offer excellent value.

FlaskScrubber vs. SteamScrubber

Labconco's FlaskScrubber and SteamScrubber lines are designed around somewhat different glassware loads.

The FlaskScrubber emphasizes direct spindle injection for narrow-neck vessels.

The SteamScrubber is generally configured around rack washing for:

• Beakers

• Dishes

• Wide-mouth glassware

• General labware

For a laboratory washing substantial numbers of flasks and bottles, the FlaskScrubber is generally the more appropriate configuration.

FlaskScrubber vs. Hand Washing

Hand washing narrow-neck vessels can consume significant technician time.

A typical manual process may require:

Pre-rinsing
Adding detergent
Brushing
Repeated internal rinsing
Purified-water rinsing
Draining
Drying

Even then, results can vary between operators.

Automated washing can help standardize many of these variables while freeing scientists and technicians for more productive laboratory work.

Biotechnology & Microbiology Applications

Biotechnology and microbiology laboratories routinely generate large quantities of:

• Erlenmeyer flasks

• Media bottles

• Reagent bottles

• Culture vessels

• Graduated cylinders

These often contain dried media, salts, sugars, proteins, and biological residues.

High-temperature washing, steam, and direct spindle injection can substantially reduce the effort required to prepare these items for reuse.

Analytical Chemistry Applications

Analytical laboratories can be particularly sensitive to residual contaminants.

Detergent, mineral ions, or residues from previous samples can affect subsequent measurements.

The FlaskScrubber's combination of controlled washing and multiple purified-water rinses makes it useful for laboratories involved in:

Chromatography sample preparation
Spectroscopy
Environmental analysis
Reagent preparation
Trace chemistry
Quantitative analysis

Cleaning requirements should always be matched to the sensitivity of the actual analytical method.

Pharmaceutical & Quality-Control Applications

Pharmaceutical research and quality-control groups often require consistent cleaning procedures.

Programmable automated washing can help control variables such as:

• Wash temperature

• Wash duration

• Rinse sequence

• Drying

For regulated applications, individual facilities remain responsible for appropriate qualification, validation, documentation, and standard operating procedures.

Food Science & Fermentation Applications

Fermentation and food-science laboratories frequently process glassware containing:

Culture media
Sugars
Proteins
Oils
Microbial residue

The combination of high-temperature washing, steam treatment, and spindle injection can make the FlaskScrubber especially useful for these workloads.

Water Requirements

Proper water supply is important for achieving consistent cleaning performance.

The system accepts municipal hot water through a:

3/8-inch NPT female connection

and purified water through a:

3/8-inch hose-barb connection.

Incoming water pressure and flow should meet manufacturer requirements.

Water Consumption

The 4420321 uses approximately:

3.4 gallons / 13 liters per fill.

Total water consumption depends on the selected cycle and number of wash and rinse stages.

Programs incorporating multiple purified-water rinses will naturally use more total water.

Electrical Requirements

The 4420321 is the:

208/230V, 50/60 Hz, single-phase configuration.

Manufacturer documents from different production periods list approximately 11–12 A, so the actual equipment data plate should control installation planning.

Appropriate dedicated electrical service should be provided according to the manufacturer's installation instructions and local electrical requirements.

Refurbishment & Testing by American Instrument Exchange

Laboratory glassware washers combine water, heat, pumps, electronics, plumbing, valves, and controls, making thorough operational testing especially important when purchasing used equipment.

American Instrument Exchange technicians run refurbished washers repeatedly through their programmed cycles.

Evaluation may include:

• Water filling

• Wash pump operation

• Spindle washing

• Spray-arm performance

• Water heating

• Steam generator

• Drain pump

• Purified-water system

• Detergent dispensing

• Rinse system

• Forced-air drying

• Controls and LCD

• Cycle programming

• Alarm functions

• Door operation

• Electrical systems

• Plumbing connections

• Leakage

Parts are repaired or replaced as necessary before the machine is prepared for sale.

Refurbished Labconco Glassware Washers from American Instrument Exchange

A refurbished Labconco FlaskScrubber can provide a laboratory with professional automated glassware cleaning at substantially lower cost than purchasing a current-generation machine new.

American Instrument Exchange carries refurbished:

• FlaskScrubber glassware washers

• SteamScrubber glassware washers

• Glassware washers

• Autoclaves

• Laboratory ovens

• Water-purification equipment

• Incubators

• Centrifuges

• Freeze dryers

• Refrigerators

• Freezers

• Other laboratory equipment

This 4420321 is backed by a 90-day warranty from American Instrument Exchange.

Shipping & Installation Considerations

The Labconco 4420321 measures approximately:

24.1"W x 27.4"D x 34.1–36.1"H

and Labconco literature lists a shipping weight of approximately:

206 lb. / 93 kg.

American Instrument Exchange currently lists approximately 182 lb. for the inventory unit.

Before delivery, laboratories should confirm:

• Undercounter opening dimensions

• Access path

• Hot-water supply

• Purified-water supply if required

• Drain connection

• Electrical service

• Service clearance

• Level installation

Qualified plumbing and electrical personnel may be required for final connection.

Related Laboratory Equipment

Laboratories using the Labconco FlaskScrubber may also require water purification systems, laboratory glassware, autoclaves, laboratory ovens, incubators, orbital shakers, centrifuges, biosafety cabinets, refrigerators, freezers, and other sample-preparation equipment.

American Instrument Exchange supplies used, refurbished, and new laboratory equipment for biotechnology, pharmaceutical, academic, analytical, environmental, food-science, healthcare, and industrial laboratories.

Labconco FlaskScrubber 4420321 Frequently Asked Questions

What is the Labconco FlaskScrubber 4420321?

The 4420321 is a 208/230V undercounter laboratory glassware washer designed especially for narrow-neck glassware.

Is this an undercounter model?

Yes. The 4420321 is designed for installation beneath suitable laboratory casework.

Does the 4420321 have a viewing window?

No. The 4420321 is the standard undercounter high-voltage configuration without a viewing window.

Which model has the window?

The corresponding high-voltage undercounter model with a viewing window is the 4420331.

How many spindle positions does the rack have?

The lower rack includes 36 detachable large spindles.

Can it clean Erlenmeyer flasks?

Yes. Erlenmeyer flasks are one of the principal applications for the direct-injection spindle rack.

Can it wash volumetric flasks?

Yes. The spindle system is specifically useful for narrow-neck glassware such as volumetric flasks.

Can it wash media bottles?

Yes. Compatible media and reagent bottles can be positioned over appropriately sized spindles.

Can it wash general-purpose labware?

Yes. Optional standard racks and inserts allow processing of beakers, tubes, dishes, and other laboratory items.

What is the maximum washing temperature?

The 4420321 reaches approximately 93°C / 199°F.

Why does this model reach a higher temperature than the 4420320?

The 4420321 uses 208/230V electrical service, while the 4420320 is the 115V version limited to approximately 82°C / 180°F.

Does the FlaskScrubber use steam?

Yes. A built-in steam generator produces hot vapor to help loosen dried residues.

Can it rinse with purified water?

Yes. The built-in purified-water pump supports up to six purified-water rinses.

Does the washer dry glassware?

Yes. The system uses heated forced-air drying.

Does the drying air go inside the flasks?

Yes. Drying air travels through the spindle system, helping remove water from the interiors of narrow-neck vessels.

How many wash programs does the 230V model have?

The high-voltage version includes the standard factory programs plus additional Intense, Intense Plus, and Extreme cycles, along with two user-set programs.

Can users create their own programs?

Yes. Two user-defined cycle programs can be stored.

Does the washer have delayed start?

Yes. Start can be delayed for up to approximately eight hours.

How much water does it use?

Approximately 3.4 gallons / 13 liters per fill.

What electrical service is required?

The 4420321 requires 208/230V, 50/60 Hz, single-phase electrical service.

What are the exterior dimensions?

Approximately 24.1"W x 27.4"D x 34.1–36.1"H.

How large is the interior chamber?

American Instrument Exchange lists approximately 22.6"W x 21.3"D x 18.7"H.

How does the 4420321 compare with the newer FlaskScrubber Vantage?

The Vantage adds modern touchscreen controls, more extensive programming, conductivity monitoring, data connectivity, and other current-generation features. The 4420321 retains the core high-performance functions of direct spindle washing, 93°C cleaning, steam, purified-water rinsing, and forced-air drying.

Is this model better for narrow-neck glassware than a SteamScrubber?

Generally, yes. The direct spindle system is specifically designed to clean inside narrow-neck vessels, while SteamScrubber configurations are more focused on general and wide-mouth labware.

Does American Instrument Exchange test the unit before shipment?

Yes. AIE technicians run glassware washers through multiple programmed cycles while evaluating washing, heating, steam generation, rinsing, draining, drying, controls, and overall function.

What warranty is included?

This refurbished Labconco FlaskScrubber 4420321 includes a 90-day warranty from American Instrument Exchange.

Click Here to see the Labconco Flaskscrubber glassware washer on the American Instrument Exchange YouTube channel