ASTM F953-19

Standard Specification for Commercial Dishwashing Machines (Stationary Rack, Dump Type) Chemical Sanitizing

ABSTRACT
This specification covers manually fed, spray-type, stationary rack, automatically controlled, dump type, chemical sanitizing commercial dishwashing machines. Dishwashing machines shall be of the following types, styles, classes: type I - Straight-through model, 34 in. nominal table height. This machine is used in line with table on each side, type II - Corner model, 34 in. nominal table height. This machine is used in corner placement forming a 90° table on each side, and type III - Under counter, front load. This machine may be installed under counters; style A - single rack, and style B - double rack. No leakage shall occur when tested at pressures up to 125 % of the manufacturer's recommended supply line pressure. The dishwasher materials, construction, operation cycle, electrical equipment, lubrication, and coating shall meet the requirements prescribed.
SCOPE
1.1 This specification covers manually fed, spray-type, stationary rack, automatically controlled, dump type, chemical sanitizing commercial dishwashing machines.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 The following safety hazards caveat pertains only to the test methods portion, Section 7, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Sep-2019
• ICS: 97.040.40 - Dishwashers
• Technical Committee: F26 - Food Service Equipment
• Drafting Committee: F26.01 - Cleaning and Sanitation Equipment

Relations

• Replaces: ASTM F953-14 - Standard Specification for Commercial Dishwashing Machines (Stationary Rack, Dump Type) Chemical Sanitizing
• Effective Date: 01-Oct-2019
• Refers: ASTM B127-19 - Standard Specification for Nickel-Copper Alloy Plate, Sheet, and Strip
• Effective Date: 01-Nov-2019
• Refers: ASTM F760-93(2017) - Standard Specification for Food Service Equipment Manuals
• Effective Date: 01-Nov-2017
• Refers: ASTM A554-15a - Standard Specification for Welded Stainless Steel Mechanical Tubing
• Effective Date: 01-Sep-2015
• Refers: ASTM F1696-15 - Standard Test Method for Energy Performance of Stationary-Rack, Door-Type Commercial Dishwashing Machines
• Effective Date: 01-Aug-2015
• Refers: ASTM A554-15 - Standard Specification for Welded Stainless Steel Mechanical Tubing
• Effective Date: 01-Jan-2015
• Refers: ASTM A554-14 - Standard Specification for Welded Stainless Steel Mechanical Tubing
• Effective Date: 01-Jul-2014
• Refers: ASTM F1696-14 - Standard Test Method for Energy Performance of Single-Rack, Door-Type Commercial Dishwashing Machines
• Effective Date: 01-May-2014
• Refers: ASTM A276-13a - Standard Specification for Stainless Steel Bars and Shapes
• Effective Date: 01-Nov-2013
• Refers: ASTM A276-13 - Standard Specification for Stainless Steel Bars and Shapes
• Effective Date: 01-May-2013
• Refers: ASTM A554-13 - Standard Specification for Welded Stainless Steel Mechanical Tubing
• Effective Date: 01-Apr-2013
• Refers: ASTM F760-93(2012) - Standard Specification for Food Service Equipment Manuals
• Effective Date: 01-May-2012
• Refers: ASTM A582/A582M-12e1 - Standard Specification for Free-Machining Stainless Steel Bars
• Effective Date: 01-Mar-2012
• Refers: ASTM A582/A582M-12 - Standard Specification for Free-Machining Stainless Steel Bars
• Effective Date: 01-Mar-2012
• Refers: ASTM A554-11 - Standard Specification for Welded Stainless Steel Mechanical Tubing
• Effective Date: 15-Oct-2011

Overview

ASTM F953-19 is the standard specification established by ASTM International for commercial dishwashing machines of the stationary rack, dump type, utilizing chemical sanitizing. This standard defines requirements for the design, construction, materials, operation cycle, and performance evaluation of manually fed, spray-type commercial dishwashers. The standard ensures machines are safe, effective, durable, and suitable for commercial food service operations such as restaurants, cafeterias, and institutional kitchens.

ASTM F953-19 aims to provide clear guidance for manufacturers, purchasers, and regulatory agencies, ensuring that dishwashing machines consistently achieve reliable cleaning and sanitization of eating and drinking utensils.

Key Topics

• Scope and Classification
  The standard covers stationary rack, dump type, chemical sanitizing commercial dishwashing machines. Machines are classified by type, style, and capacity:

  • Type I - Straight-through, 34 in. nominal table height
  • Type II - Corner placement, forms 90° table angle, 34 in. nominal table height
  • Type III - Under counter, front load installation
    Each type offers single or double rack styles and specified rack capacities.

• Material and Construction

  • Use of corrosion-resistant materials, including specific stainless steel and nickel-copper alloys
  • Solid construction to ensure rigidity, quiet operation, and prevention of water leakage or overflow
  • Components such as doors, tanks, spray assemblies, and legs are designed for easy access and maintenance

• Operation and Performance

  • Automatic operation cycles for washing, rinsing, and sanitizing with chemical agents
  • Compliance with noise level requirements (not exceeding 80 dBa at workstations)
  • External leakage prevention and robust backflow protection as per ASSE standards

• Safety and Marking

  • Compliance with OSHA, UL, and NSF/ANSI standards for electrical safety, food contact safety, and equipment manuals
  • Required product identification plates and instruction plates for operation cycles and sanitizing requirements

Applications

ASTM F953-19 compliant commercial dishwashing machines are essential in environments where cleanliness, sanitation, and operational reliability are critical. Typical applications include:

• Restaurants and Foodservice Facilities
  Use for efficient cleaning and sanitizing of dishware, glassware, and utensils, ensuring compliance with health regulations
• Institutional and Industrial Kitchens
  Hospitals, schools, and corporate cafeterias rely on these dishwashing machines for reliable, high-throughput warewashing operations
• Hospitality Industry
  Hotels and catering services utilize compliant machines for effective foodservice equipment sanitation

These machines are particularly suitable for installations that require stationary, rack-based cleaning systems and are available in configurations optimized for various kitchen layouts and production volumes.

Related Standards

ASTM F953-19 references several important related standards to ensure quality, performance, and regulatory compliance:

• ASTM A240, A276, A554, A582/A582M, B127 – Specifications for various stainless steel and nickel-copper materials
• ASTM F760 – Food service equipment manuals
• ASTM F1696 – Test method for energy performance of stationary-rack, door-type commercial dishwashing machines
• OSHA 29 CFR Part 1910 – Occupational safety and health requirements
• NSF/ANSI 3, 29 – Commercial warewashing equipment and chemical feeders standards
• UL 921, UL 969 – Safety standards for commercial dishwashers and marking/labeling systems
• ASSE 1004 – Backflow prevention for commercial dishwashing machines

Following ASTM F953-19 assures stakeholders that commercial dishwashing machines deliver verified performance, safety, and hygiene, supporting efficient and regulatory-compliant foodservice operations.

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F953 −19 An American National Standard
Standard Specification for
Commercial Dishwashing Machines (Stationary Rack, Dump
Type) Chemical Sanitizing
ThisstandardisissuedunderthefixeddesignationF953;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope B127 Specification for Nickel-CopperAlloy (UNS N04400)
Plate, Sheet, and Strip
1.1 This specification covers manually fed, spray-type, sta-
F760 Specification for Food Service Equipment Manuals
tionary rack, automatically controlled, dump type, chemical
F1696 Test Method for Energy Performance of Stationary-
sanitizing commercial dishwashing machines.
Rack, Door-Type Commercial Dishwashing Machines
1.2 The values stated in inch-pound units are to be regarded
2.2 OSHA Standard:
as standard. The values given in parentheses are mathematical
Title29, CodeofFederalRegulations(CFR),ChapterXVII,
conversions to SI units that are provided for information only
and are not considered standard. Part 1910
1.3 The following safety hazards caveat pertains only to the
2.3 NSF Standards:
test methods portion, Section 7, of this specification: This
NSF/ANSI 3 Commercial Warewashing Equipment
standard does not purport to address all of the safety concerns,
NSF/ANSI 29 Detergent and Chemical Feeders for Com-
if any, associated with its use. It is the responsibility of the user
mercial Spray-Type Dishwashing Machines
of this standard to establish appropriate safety, health, and
NSF Listing Food Equipment
environmental practices and determine the applicability of
2.4 UL Standards:
regulatory limitations prior to use.
UL 921 Commercial Dishwashers
1.4 This international standard was developed in accor-
UL 969 Marking and Labeling Systems
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
2.5 ASSE Standard:
Development of International Standards, Guides and Recom-
Std. No. 1004 Performance Requirements for Backflow
mendations issued by the World Trade Organization Technical
Prevention Requirements for Commercial Dishwashing
Barriers to Trade (TBT) Committee.
Machines
2. Referenced Documents
3. Terminology
2.1 ASTM Standards:
3.1 Definitions:
A240 Specification for Chromium and Chromium-Nickel
3.1.1 commercial dishwashing machines—machines that
Stainless Steel Plate, Sheet, and Strip for Pressure Vessels
uniformly wash, rinse, and sanitize eating and drinking uten-
and for General Applications
sils. The machines shall be capable of removing physical soil
A276 Specification for Stainless Steel Bars and Shapes
and sanitizing multiple use eating and drinking utensils. The
A554 Specification for Welded Stainless Steel Mechanical
dishwashing machines normally consist of the following prin-
Tubing
cipal parts: Legs, wash chamber hood, tank, doors, spray
A582/A582M Specification for Free-Machining Stainless
Steel Bars assemblies, pumps, motors, controls, piping, valves, chemical
sanitizing equipment, and accessories.
This specification is under the jurisdiction of ASTM Committee F26 on Food
Service Equipment and is the direct responsibility of Subcommittee F26.01 on
Cleaning and Sanitation Equipment. Available from Superintendent of Documents, Government Printing Office,
Current edition approved Oct. 1, 2019. Published November 2019. Originally Washington, DC 20402.
approved in 1985. Last previous edition approved in 2014 as F953 – 14. DOI: Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd.,Ann
10.1520/F0953-19. Arbor, MI 48113-0140.
2 5
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Underwriters Laboratories (UL), Corporate Progress, 333
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Pfingsten Rd., Northbrook, IL 60062.
Standards volume information, refer to the standard’s Document Summary page on Available from ASSE International, 18927 Hickory Creek Drive, Suite 220
the ASTM website. Mokena, Illinois 60448.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F953 − 19
4. Classification 6.3 Performance Testing—When specified in the contract or
purchase order, performance testing shall be performed in
4.1 Types, Styles, Classes, and Groups—Dishwashing ma-
accordance with Test Method F1696.
chines shall be of the following types, styles, classes, size, and
capacity groups as specified:
7. Test Methods
4.1.1 Type I—Straight-through model, 34 in. (863.6 mm)
7.1 Operational—Each machine shall be thoroughly tested
nominal table height.This machine is used in line with table on
in accordance with the manufacturer’s instructions to deter-
each side.
mine compliance with the requirements of NSF/ANSI 3 and
4.1.1.1 Style A—Single rack.
UL 921.
3 3
4.1.1.2 Size and Capacity, 19- ⁄4 by 19- ⁄4-in. (501.6 by
7.2 External Leakage—No leakage shall occur when tested
501.6 mm) (nominal) racks at minimum of 36 racks per hour.
at pressures up to 125 % of the manufacturer’s recommended
4.1.1.3 Style B—Double rack.
3 3
supply line pressure.
4.1.1.4 Size and Capacity, 19- ⁄4 by 19- ⁄4-in. (501.6 by
501.6 mm) (nominal) racks at minimum of 72 racks per hour.
7.3 Performance Profiles—See Test Method F1696.
4.1.2 Type II—Corner model, 34 in. (863.6 mm) nominal
8. Quality Assurance
table height.This machine is used in corner placement forming
a 90° table on each side.
8.1 Unless otherwise specified in the contract or purchase
4.1.2.1 Style A—Single rack.
order, the manufacturer is responsible for the performance of
3 3
4.1.2.2 Size and Capacity, 19- ⁄4 by 19- ⁄4-in. (501.6 by
all requirements as specified herein. Except as otherwise
501.6 mm) (nominal) racks at minimum of 36 racks per hour.
specified in the contract or order, the manufacturer may use his
4.1.2.3 Style B—Double rack.
own or any other facilities suitable for the testing of the
3 3
4.1.2.4 Size and Capacity, 19- ⁄4 by 19- ⁄4-in. (501.6 by
machine requirements specified herein.
501.6 mm) (nominal) racks at minimum of 72 racks per hour.
9. Physical Requirements
4.1.3 Type III—Under counter, front load. This machine
may be installed under counters.
9.1 Materials—All materials shall be specified herein.
4.1.3.1 Style A—Single rack.
Whenever specific materials are referenced, it is understood
3 3
4.1.3.2 Size and Capacity, 19- ⁄4 by 19- ⁄4-in. (501.6 by
thattheuseofmaterialsandmaterialthicknessdemonstratedto
501.6 mm) (nominal) racks at minimum of 21 racks per hour.
be equally satisfactory for their intended purpose are accept-
able. Materials used shall be free from defects that would
5. Ordering Data
adversely affect the performance or maintainability of indi-
5.1 Purchasers should select the preferred options permitted
vidual components of the overall assembly. The dishwashing
herein and include the following information in the procure-
machinesshallmeetthematerialrequirementsofNSF/ANSI3.
ment document:
9.1.1 Corrosion-Resistant Steel—Corrosion-resistant steel
5.1.1 Title, number, and date of this specification.
shall conform to requirements of any 300 series stainless steels
5.1.2 Type I or II straight through, corner machine, or Type
specified in 2.1.
III under counter (see 4.1).
9.1.2 Corrosion-Resisting Material—Corrosion-resisting
5.1.3 Noise level requirements, if other than specified (see
material is other than corrosion-resistant steel that is equivalent
6.2).
in the dishwasher application.
5.1.4 When a service-supply valve is required (see 9.3.3).
9.1.3 Nickel-Copper Alloy—Nickel-copper alloys shall con-
5.1.5 Special electrical power supply characteristics.
form to the requirements of Specifications B127, A582/
Specify current, voltage, phase, frequency (see 9.4). Standard
A582M, A554, A276, and A240.
electrical characteristics are 115 V, single phase, 60 Hz.
9.2 Construction—The dishwasher shall conform to the
5.1.6 When detergent feeder is required.
design and construction requirements of NSF/ANSI 3. The
5.1.7 When rinse agent feeder is required.
dishwashing machine shall be complete so that when con-
5.1.8 When energy consumption profiles, water consump-
nectedtothespecifiedsourceofpower,watersupply,drainand
tion profiles, or productivity profiles are desired (see 7.3).
detergent, sanitizer, and rinse agent feeders, as applicable, the
5.1.9 Manufacturer’s certification, when required (see Sec-
unit can be used for its intended function. Dishwashers shall be
tion 10).
rigid, quiet in operation, free from objectionable vibration, and
soconstructedastopreventobjectionablesplashingofwateror
6. Performance Requirements
overflow of water to the outside of the machine. Parts requiring
6.1 Performance Standards Compliance—Dishwashing ma-
adjustment or service, or both, shall be readily accessible. The
chinesshallconformtotherequirementsofOSHATitle29,UL
machine shall wash dishes by means of a water and detergent
921, and NSF/ANSI 3, and the detergent, rinse agent, and
solution pumped from the tank, and shall rinse the dishes with
sanitizer feeders shall comply with NSF/ANSI 29.
a pumped, recirculated fresh water sanitizer solution. Provi-
6.2 Noise Level—Unless otherwise specified, the noise level sions shall be made to automatically fill the tank directly from
of the dishwasher, when operating, exclusive of loading, the regular hot water supply. The wash, dwell, and sanitizing
unloading, and servicing, shall not exceed 80 dBa at loading rinse cycles shall be automatically controlled. A light shall be
and unloading stations, measured at 5 ft above floor level, and provided to indicate when the machine is in operation. Ma-
2 ft from the machine. chines shall be provided with tracks of corrosion-resistant steel
F953 − 19
or other corrosion-resisting material not less than 14 gage counterbalanced. Door(s) shall be splashproof and their ex-
(0.070 in. (1.78 mm)). Dishwashers shall have an inside posed edges shall be smooth and formed to prevent canting or
warping.
working height, including the door height, of not less than 16
9.3.8 Legs (Feet)—The machines shall be rigidly con-
in. (406.4 mm) above the track.
structed and have legs (feet) made of corrosion-resistant steel,
9.3 Operation Cycle—At the beginning of the wash cycle, a
or other corrosi
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F953 − 14 F953 − 19 An American National Standard
Standard Specification for
Commercial Dishwashing Machines (Stationary Rack, Dump
Type) Chemical Sanitizing
This standard is issued under the fixed designation F953; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification covers manually fed, spray-type, stationary rack, automatically controlled, dump type, chemical sanitizing
commercial dishwashing machines.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 The following safety hazards caveat pertains only to the test methods portion, Section 7, of this specification: This standard
does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this
standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory
limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
A240 Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for
General Applications
A276 Specification for Stainless Steel Bars and Shapes
A554 Specification for Welded Stainless Steel Mechanical Tubing
A582/A582M Specification for Free-Machining Stainless Steel Bars
B127 Specification for Nickel-Copper Alloy (UNS N04400) Plate, Sheet, and Strip
F760 Specification for Food Service Equipment Manuals
F1696 Test Method for Energy Performance of Stationary-Rack, Door-Type Commercial Dishwashing Machines
2.2 OSHA Standard:
Title 29, Code of Federal Regulations (CFR), Chapter XVII, Part 1910
2.3 NSF Standards:
NSF/ANSI 3 Commercial Warewashing Equipment
NSF/ANSI 29 Detergent and Chemical Feeders for Commercial Spray-Type Dishwashing Machines
NSF Listing Food Equipment
2.4 UL Standards:
UL 921 Commercial Dishwashers
UL 969 Marking and Labeling Systems
2.5 ASSE Standard:
Std. No. 1004 Performance Requirements for Backflow Prevention Requirements for Commercial Dishwashing Machines
This specification is under the jurisdiction of ASTM Committee F26 on Food Service Equipment and is the direct responsibility of Subcommittee F26.01 on Cleaning
and Sanitation Equipment.
Current edition approved June 1, 2014Oct. 1, 2019. Published July 2014November 2019. Originally approved in 1985. Last previous edition approved in 20082014 as
F953 – 08.F953 – 14. DOI: 10.1520/F0953-14.10.1520/F0953-19.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from Superintendent of Documents, Government Printing Office, Washington, DC 20402.
Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann Arbor, MI 48113-0140.
Available from Underwriters Laboratories (UL), Corporate Progress, 333 Pfingsten Rd., Northbrook, IL 60062.
Available from ASSE International, 18927 Hickory Creek Drive, Suite 220 Mokena, Illinois 60448.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F953 − 19
3. Terminology
3.1 Definitions:
3.1.1 commercial dishwashing machines—machines that uniformly wash, rinse, and sanitize eating and drinking utensils. The
machines shall be capable of removing physical soil and sanitizing multiple use eating and drinking utensils. The dishwashing
machines normally consist of the following principal parts: Legs, wash chamber hood, tank, doors, spray assemblies, pumps,
motors, controls, piping, valves, chemical sanitizing equipment, and accessories.
4. Classification
4.1 Types, Styles, Classes, and Groups—Dishwashing machines shall be of the following types, styles, classes, size, and
capacity groups as specified:
4.1.1 Type I—Straight-through model, 34 in. (863.6 mm) nominal table height. This machine is used in line with table on each
side.
4.1.1.1 Style A—Single rack.
3 3
4.1.1.2 Size and Capacity, 19- ⁄4 by 19- ⁄4-in. (501.6 by 501.6 mm) (nominal) racks at minimum of 36 racks per hour.
4.1.1.3 Style B—Double rack.
3 3
4.1.1.4 Size and Capacity, 19- ⁄4 by 19- ⁄4-in. (501.6 by 501.6 mm) (nominal) racks at minimum of 72 racks per hour.
4.1.2 Type II—Corner model, 34 in. (863.6 mm) nominal table height. This machine is used in corner placement forming a 90°
table on each side.
4.1.2.1 Style A—Single rack.
3 3
4.1.2.2 Size and Capacity, 19- ⁄4 by 19- ⁄4-in. (501.6 by 501.6 mm) (nominal) racks at minimum of 36 racks per hour.
4.1.2.3 Style B—Double rack.
3 3
4.1.2.4 Size and Capacity, 19- ⁄4 by 19- ⁄4-in. (501.6 by 501.6 mm) (nominal) racks at minimum of 72 racks per hour.
4.1.3 Type III—Under counter, front load. This machine may be installed under counters.
4.1.3.1 Style A—Single rack.
3 3
4.1.3.2 Size and Capacity, 19- ⁄4 by 19- ⁄4-in. (501.6 by 501.6 mm) (nominal) racks at minimum of 21 racks per hour.
5. Ordering Data
5.1 Purchasers should select the preferred options permitted herein and include the following information in the procurement
document:
5.1.1 Title, number, and date of this specification.
5.1.2 Type I or II straight through, corner machine, or Type III under counter (see 4.1).
5.1.3 Noise level requirements, if other than specified (see 6.2).
5.1.4 When a service-supply valve is required (see 9.3.3).
5.1.5 Special electrical power supply characteristics. Specify current, voltage, phase, frequency (see 9.4). Standard electrical
characteristics are 115 V, single phase, 60 Hz.
5.1.6 When detergent feeder is required.
5.1.7 When rinse agent feeder is required.
5.1.8 When energy consumption profiles, water consumption profiles, or productivity profiles are desired (see 7.3).
5.1.9 Manufacturer’s certification, when required (see Section 10).
6. Performance Requirements
6.1 Performance Standards Compliance—Dishwashing machines shall conform to the requirements of OSHA Title 29, UL 921,
and NSF/ANSI 3, and the detergent, rinse agent, and sanitizer feeders shall comply with NSF/ANSI 29.
6.2 Noise Level—Unless otherwise specified, the noise level of the dishwasher, when operating, exclusive of loading, unloading,
and servicing, shall not exceed 80 dBa at loading and unloading stations, measured at 5 ft above floor level, and 2 ft from the
machine.
6.3 Performance Testing—When specified in the contract or purchase order, performance testing shall be performed in
accordance with Test Method F1696.
7. Test Methods
7.1 Operational—Each machine shall be thoroughly tested in accordance with the manufacturer’s instructions to determine
compliance with the requirements of NSF/ANSI 3 and UL 921.
7.2 External Leakage—No leakage shall occur when tested at pressures up to 125 % of the manufacturer’s recommended supply
line pressure.
7.3 Performance Profiles—See Test Method F1696.
F953 − 19
8. Quality Assurance
8.1 Unless otherwise specified in the contract or purchase order, the manufacturer is responsible for the performance of all
requirements as specified herein. Except as otherwise specified in the contract or order, the manufacturer may use his own or any
other facilities suitable for the testing of the machine requirements specified herein.
9. Physical Requirements
9.1 Materials—All materials shall be specified herein. Whenever specific materials are referenced, it is understood that the use
of materials and material thickness demonstrated to be equally satisfactory for their intended purpose are acceptable. Materials
used shall be free from defects that would adversely affect the performance or maintainability of individual components of the
overall assembly. The dishwashing machines shall meet the material requirements of NSF/ANSI 3.
9.1.1 Corrosion-Resistant Steel—Corrosion-resistant steel shall conform to requirements of any 300 series stainless steels
specified in 2.1.
9.1.2 Corrosion-Resisting Material—Corrosion-resisting material is other than corrosion-resistant steel that is equivalent in the
dishwasher application.
9.1.3 Nickel-Copper Alloy—Nickel-copper alloys shall conform to the requirements of Specifications B127, A582/A582M,
A554, A276, and A240.
9.2 Construction—The dishwasher shall conform to the design and construction requirements of NSF/ANSI 3. The dishwashing
machine shall be complete so that when connected to the specified source of power, water supply, drain and detergent, sanitizer,
and rinse agent feeders, as applicable, the unit can be used for its intended function. Dishwashers shall be rigid, quiet in operation,
free from objectionable vibration, and so constructed as to prevent objectionable splashing of water or overflow of water to the
outside of the machine. Parts requiring adjustment or service, or both, shall be readily accessible. The machine shall wash dishes
by means of a water and detergent solution pumped from the tank, and shall rinse the dishes with a pumped, recirculated fresh
water sanitizer solution. Provisions shall be made to automatically fill the tank directly from the regular hot water supply. The
wash, dwell, and sanitizing rinse cycles shall be automatically controlled. A light shall be provided to indicate when the machine
is in operation. Machines shall be provided with tracks of corrosion-resistant steel or other corrosion-resisting material not less than
14 gage (0.070 in. (1.78 mm)). Dishwashers shall have an inside working height, including the door height, of not less than 16
in. (406.4 mm) above the track.
9.3 Operation Cycle—At the beginning of the wash cycle, a detergent dispenser shall be activated to supply a measured amount
of detergent into the tank. The machine will automatically start the wash cycle, after which, the drain automatically opens to
“dump” the wash water to a holding tank
...