ASTM D2609-24

Standard Specification for Plastic Insert Fittings for Polyethylene (PE) Plastic Pipe

ABSTRACT
This specification covers plastic insert fittings for polyethylene (PE) plastic pipe. The fittings shall be made from one of the following plastics: nylon plastics, propylene plastics, and poly(vinyl chloride) plastics. Dimensions and burst pressure for the fittings should meet the requirements specified. The fittings shall be homogeneous throughout and free of cracks, holes, foreign inclusions, or other defects. The fittings shall be as uniform as commercially practicable in color, opacity, density, and other physical properties.
SCOPE
1.1 This specification covers plastic insert fittings for polyethylene (PE) plastic pipe, and also PVC insert fittings for PE to PVC pipe transitions. Included are requirements for materials, workmanship, dimensions, and burst pressure.  
1.2 The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.  
1.3 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.  
1.4  The following safety hazards caveat pertains only to the test methods portion, Section 8, 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.  
1.5 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: 31-Mar-2024
• ICS: 23.040.45 - Plastics fittings
• Technical Committee: F17 - Plastic Piping Systems
• Drafting Committee: F17.10 - Fittings

Relations

• Replaces: ASTM D2609-21 - Standard Specification for Plastic Insert Fittings for Polyethylene (PE) Plastic Pipe
• Effective Date: 01-Apr-2024
• Referred By: ASTM F645-18b - Standard Guide for Selection, Design, and Installation of Thermoplastic Water- Pressure Piping Systems
• Effective Date: 01-Apr-2024

Overview

ASTM D2609-24 is the international standard specification for plastic insert fittings used with polyethylene (PE) plastic pipe. Developed by ASTM International, this standard ensures consistency, safety, and reliability for fittings manufactured from nylon plastics, propylene plastics (PP), or poly(vinyl chloride) plastics (PVC). Its requirements encompass material selection, dimensional tolerances, burst pressure, workmanship, and appropriate marking, supporting manufacturers, regulators, and end-users in producing and identifying quality fittings suitable for various piping applications including potable water systems.

Key Topics

• Material Requirements:
  • Fittings must be made from nylon, PP, or PVC, each with defined performance specifications for impact resistance and tensile strength.
  • Only virgin or clean manufacturer’s rework material of the same type may be used-no mixing of plastics.
• Dimensional Tolerances and Design:
  • Detailed measurements for insert ends, elbows, tees, and adapters, including barb design and wall thickness.
  • All openings and threads should comply with specified alignment and gaging criteria.
• Performance and Pressure Ratings:
  • Fittings must meet minimum burst pressure levels when tested according to ASTM D1599.
• Workmanship and Appearance:
  • Homogeneous material, uniform color, and freedom from defects like cracks or inclusions are required for all plastic insert fittings.
• Marking and Traceability:
  • Each fitting must be marked with the manufacturer’s name/trademark, material designation, size, and potable water usage certification if applicable.
• Potable Water Safety:
  • Products intended for potable water contact must meet NSF/ANSI 61 or the health effects criteria in NSF/ANSI 14.

Applications

Plastic insert fittings for PE pipe are critical components in a wide range of piping systems, particularly where flexibility, corrosion resistance, and ease of installation are valued. Primary applications include:

• Water Supply Systems: Used extensively for potable water distribution, meeting health and safety standards through certification.
• Irrigation Networks: Providing durable connections for agricultural, landscape, and turf irrigation systems.
• Plumbing and Municipal Infrastructure: Ideal for both residential and commercial building water service lines.
• PE to PVC Transitions: Specialized fittings support direct transitions between PE and schedule 40 PVC pipes, improving versatility in system design.

By ensuring fittings meet standardized requirements, ASTM D2609-24 helps minimize leaks, system failures, and compatibility issues across diverse industries.

Related Standards

Implementing ASTM D2609-24 often requires reference to related standards to ensure complete compliance and system compatibility:

• ASTM D2239: Specification for PE plastic pipe (SIDR-PR) based on controlled inside diameter.
• ASTM D2466: Specification for schedule 40 PVC plastic pipe fittings.
• ASTM F1498: Taper pipe threads for thermoplastic pipe and fittings.
• NSF/ANSI 14 and 61: Evaluation and certification of plastic piping system components for health and potable water contact.
• ASTM D256, D638, D648, D789: Test methods for physical properties of plastics such as impact resistance, tensile strength, and deflection temperature.
• ASTM D1599: Standard test method for resistance to short-time hydraulic pressure for plastic pipe, tubing, and fittings.

Practical Value

Adhering to ASTM D2609-24 delivers substantial value by:

• Ensuring reliable, leak-resistant connections for PE piping systems.
• Enhancing public health and safety for potable water applications through compliance with recognized safety standards.
• Streamlining specification and procurement processes for engineers, contractors, and regulators.
• Supporting system longevity and cost-efficiency with durable, high-performance fittings.

Using fittings that conform to ASTM D2609-24 guarantees compatibility, traceability, and consistent quality for modern plastic piping infrastructures worldwide.

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: D2609 − 24 An American National Standard
Standard Specification for
Plastic Insert Fittings for Polyethylene (PE) Plastic Pipe
This standard is issued under the fixed designation D2609; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* D648 Test Method for Deflection Temperature of Plastics
Under Flexural Load in the Edgewise Position
1.1 This specification covers plastic insert fittings for poly-
D789 Test Method for Determination of Relative Viscosity
ethylene (PE) plastic pipe, and also PVC insert fittings for PE
of Concentrated Polyamide (PA) Solutions
to PVC pipe transitions. Included are requirements for
D1599 Test Method for Resistance to Short-Time Hydraulic
materials, workmanship, dimensions, and burst pressure.
Pressure of Plastic Pipe, Tubing, and Fittings
1.2 The text of this specification references notes, footnotes,
D1600 Terminology for Abbreviated Terms Relating to Plas-
and appendixes which provide explanatory material. These
tics (Withdrawn 2024)
notes and footnotes (excluding those in tables and figures) shall
D1784 Classification System and Basis for Specification for
not be considered as requirements of the specification.
Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlo-
1.3 The values stated in inch-pound units are to be regarded rinated Poly(Vinyl Chloride) (CPVC) Compounds
D2239 Specification for Polyethylene (PE) Plastic Pipe
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only (SIDR-PR) Based on Controlled Inside Diameter
D2466 Specification for Poly(Vinyl Chloride) (PVC) Plastic
and are not considered standard.
Pipe Fittings, Schedule 40
1.4 The following safety hazards caveat pertains only to
F412 Terminology Relating to Plastic Piping Systems
the test methods portion, Section 8, of this specification: This
F1498 Specification for Taper Pipe Threads 60° for Thermo-
standard does not purport to address all of the safety concerns,
plastic Pipe and Fittings
if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety, health, and 2.2 NSF/ANSI Standards:
environmental practices and determine the applicability of NSF/ANSI Standard No. 14 for Plastic Piping Components
regulatory limitations prior to use. and Related Materials
1.5 This international standard was developed in accor-
NSF/ANSI Standard No. 61 for Drinking Water System
dance with internationally recognized principles on standard- Components—Health Effects
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- 3. Terminology
mendations issued by the World Trade Organization Technical
3.1 Definitions are in accordance with Terminology F412
Barriers to Trade (TBT) Committee.
and abbreviations are in accordance with Terminology D1600,
unless otherwise specified.
2. Referenced Documents
2.1 ASTM Standards:
4. Classification
D256 Test Methods for Determining the Izod Pendulum
4.1 This specification covers one class of fittings suitable for
Impact Resistance of Plastics
use with PE plastic pipe that meet the requirements of
D618 Practice for Conditioning Plastics for Testing
applicable ASTM specifications, at present, this is Specifica-
D638 Test Method for Tensile Properties of Plastics
tion D2239.
4.2 This specification also covers fittings that transition
This specification is under the jurisdiction of ASTM Committee F17 on Plastic
from PE plastic pipe to Socket Type IPS PVC plastic pipe.
Piping Systems and is the direct responsibility of Subcommittee F17.10 on Fittings.
Current edition approved April 1, 2024. Published April 2024. Originally
approved 1967. Last previous edition approved in 2021 as D2609 – 21. DOI:
10.1520/D2609-24.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or The last approved version of this historical standard is referenced on
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM www.astm.org.
Standards volume information, refer to the standard’s Document Summary page on Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann
the ASTM website. Arbor, MI 48105, http://www.nsf.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D2609 − 24
A
TABLE 2 Dimensions of Insert Elbow and Tee, in. (mm)
5. Materials
5.1 Types of Plastics—The fittings shall be made from one
of the following plastics:
5.1.1 Nylon plastics (NP) meeting the requirements of
either Type I or Type II (except Grade 2A) in Test Methods
D789.
5.1.2 Propylene plastic (PP) with a minimum tensile
strength at yield of 24.0 MPa (3410 psi) when tested in
accordance with Test Method D638 at a speed of 51 mm/min
(2.0 in./min), an Izod impact resistance at 23 °C of at least 30
J/m (0.6 ft–lbf/in.) when tested in accordance with Method A
of Test Methods D256, and a minimum deflection temperature
of 64 °C at 455 KPa stress when tested in accordance with Test
Nominal Pipe Laying Length Tee and Elbow, min G
B
Method D648.
Size
5.1.3 Poly(vinyl chloride) plastics (PVC) meeting the re-
⁄2 0.344 (8.7)
quirements of 12454 or 14333, in Specification D1784. ⁄4 0.453 (11.5)
1 0.625 (15.9)
5.2 Rework Material—The manufacturers shall use only
1 ⁄4 0.781 (19.8)
1 ⁄2 0.875 (22.2)
their own clean rework fitting material and the fittings pro-
2 1.125 (28.6)
duced shall meet all the requirements of this specification. The
2 ⁄2 1.625 (41.3)
types of materials specified in 5.1 shall not be mixed with one
3 1.875 (47.6)
4 2.438 (61.9)
another.
A
The sketches and designs of fittings shown are illustrative only.
B
6. Requirements For dimensions not given in this table, see Table 1.
6.1 Dimensions and Tolerances—The dimensions and toler-
ances shall be as shown in Tables 1-3 when measured in
accordance with 8.4. The negative tolerance on all minimum also meet Table 1, with the exception that mold marks left as
dimensions is zero. a result of the manufacturing process, such as ejector pin
6.1.1 Alignment—The alignment of all openings of fittings marks, are exempt from the “V” dimension requirement, and
shall be within ⁄4 in./ft. the minimum requirement for “Z.” D, Zmax, and F apply in all
6.1.2 Fittings Not Illustrated—All fittings, whether illus- cases. For designs where the entire fitting end is barbed, such
trated in Tables 1-3 or not, shall have insert ends in accordance as “F” cannot be readily measured, “F” shall be calculated as
with Table 1 or threaded ends in accordance with Table 3. For [(Z – 2V) – D] / 2.
insert ends, which have more than four barbs, the first four 6.1.3 Threads—For all fittings having taper pipe threads,
barbs, starting from the open end of the fitting connection, shall threads shall conform to Specification F1498 and be gaged in
meet all requirements of Table 1. The remaining barbs shall accordance with 8.6.
A
TABLE 1 Dimensions of Insert End, in. (mm)
Barbs
Wall Inside
Insert
Nominal Depth, V Thickness, Diameter of
Length,
B
Length, P
Outside Diameter, Z Number
Pipe Size F Fitting, D
Y
min min max min min min min min
1 1 3
⁄2 1 ⁄4 (31.8) ⁄4 (19.0) 0.665 (16.9) 0.635 (16.1) 4 0.015 (0.4) 0.080 (2.0) 0.406 (10.3)
3 1 3
⁄4 1 ⁄4 (31.8) ⁄4 (19.0) 0.865 (22.0) 0.835 (21.2) 4 0
...

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: D2609 − 21 D2609 − 24 An American National Standard
Standard Specification for
Plastic Insert Fittings for Polyethylene (PE) Plastic Pipe
This standard is issued under the fixed designation D2609; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This specification covers plastic insert fittings for polyethylene (PE) plastic pipe, and also PVC insert fittings for PE to PVC
pipe transitions. Included are requirements for materials, workmanship, dimensions, and burst pressure.
1.2 The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notes and
footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.
1.3 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.
1.4 The following safety hazards caveat pertains only to the test methods portion, Section 8, 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.
1.5 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:
D256 Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics
D618 Practice for Conditioning Plastics for Testing
D638 Test Method for Tensile Properties of Plastics
D648 Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
D789 Test Method for Determination of Relative Viscosity of Concentrated Polyamide (PA) Solutions
D1599 Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and Fittings
D1600 Terminology for Abbreviated Terms Relating to Plastics (Withdrawn 2024)
D1784 Classification System and Basis for Specification for Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlorinated
Poly(Vinyl Chloride) (CPVC) Compounds
D2239 Specification for Polyethylene (PE) Plastic Pipe (SIDR-PR) Based on Controlled Inside Diameter
This specification is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.10 on Fittings.
Current edition approved April 1, 2021April 1, 2024. Published April 2021April 2024. Originally approved 1967. Last previous edition approved in 20152021 as
D2609 – 15.D2609 – 21. DOI: 10.1520/D2609-21.10.1520/D2609-24.
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.
The last approved version of this historical standard is referenced on www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D2609 − 24
D2466 Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40
F412 Terminology Relating to Plastic Piping Systems
F1498 Specification for Taper Pipe Threads 60° for Thermoplastic Pipe and Fittings
2.2 NSF/ANSI Standards:
NSF/ANSI Standard No. 14 for Plastic Piping Components and Related Materials
NSF/ANSI Standard No. 61 for Drinking Water System Components—Health Effects
3. Terminology
3.1 Definitions are in accordance with Terminology F412 and abbreviations are in accordance with Terminology D1600, unless
otherwise specified.
4. Classification
4.1 This specification covers one class of fittings suitable for use with PE plastic pipe that meet the requirements of applicable
ASTM specifications, at present, this is Specification D2239.
4.2 This specification also covers fittings that transition from PE plastic pipe to Socket Type IPS PVC plastic pipe.
5. Materials
5.1 Types of Plastics—The fittings shall be made from one of the following plastics:
5.1.1 Nylon plastics (NP) meeting the requirements of either Type I or Type II (except Grade 2A) in Test Methods D789.
5.1.2 Propylene plastic (PP) with a minimum tensile strength at yield of 24.0 MPa (3410 psi) when tested in accordance with Test
Method D638 at a speed of 51 mm/min (2.0 in./min), an Izod impact resistance at 23 °C of at least 30 J/m (0.6 ft–lbf/in.) when
tested in accordance with Method A of Test Methods D256, and a minimum deflection temperature of 64 °C at 455 KPa stress when
tested in accordance with Test Method D648.
5.1.3 Poly(vinyl chloride) plastics (PVC) meeting the requirements of 12454 or 14333, in Specification D1784.
5.2 Rework Material—The manufacturers shall use only their own clean rework fitting material and the fittings produced shall
meet all the requirements of this specification. The types of materials specified in 5.1 shall not be mixed with one another.
6. Requirements
6.1 Dimensions and Tolerances—The dimensions and tolerances shall be as shown in Tables 1-3 when measured in accordance
with 8.4. The negative tolerance on all minimum dimensions is zero.
6.1.1 Alignment—The alignment of all openings of fittings shall be within ⁄4 in./ft.
6.1.2 Fittings Not Illustrated—All fittings, whether illustrated in Tables 1-3 or not, shall have insert ends in accordance with Table
1 or threaded ends in accordance with Table 3. For insert ends, which have more than four barbs, the first four barbs, starting from
the open end of the fitting connection, shall meet all requirements of Table 1. The remaining barbs shall also meet Table 1, with
the exception that mold marks left as a result of the manufacturing process, such as ejector pin marks, are exempt from the “V”
dimension requirement, and the minimum requirement for “Z.” D, Zmax, and F apply in all cases. For designs where the entire
fitting end is barbed, such as “F” cannot be readily measured, “F” shall be calculated as [(Z – 2V) – D] / 2.
6.1.3 Threads—For all fittings having taper pipe threads, threads shall conform to Specification F1498 and be gaged in accordance
with 8.6.
6.1.4 Fittings that transition from PE plastic pipe to IPS size PVC plastic pipe—All PE and IPS PVC transition fittings shall be
molded from PVC meeting the requirements of 5.1.3. The sockets and spigots shall comply with the dimensions of Specification
D2466.
Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann Arbor, MI 48113-0140,48105, http://www.nsf.org.
D2609 − 24
A
TABLE 1 Dimensions of Insert End, in. (mm)
Barbs
Wall Inside
Insert
Nominal Depth, V Thickness, Diameter of
Length,
B
Length, P
Outside Diameter, Z Number
Pipe Size F Fitting, D
Y
min min max min min min min min
1 1 3
⁄2 1 ⁄4 (31.8) ⁄4 (19.0) 0.665 (16.9) 0.635 (16.1) 4 0.015 (0.4) 0.080 (2.0) 0.406 (10.3)
3 1 3
⁄4 1 ⁄4 (31.8) ⁄4 (19.0) 0.865 (22.0) 0.835 (21.2) 4 0.015 (0.4) 0.085 (2.2) 0.562 (14.3)
1 3
1 1 ⁄4 (31.8) ⁄4 (19.0) 1.095 (27.8) 1.065 (27.
...