ASTM F2854-21

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: F2854 − 20a F2854 − 21 An American National Standard
Standard Specification for
Push-Fit Crosslinked Polyethylene (PEX) Mechanical
Fittings for Crosslinked Polyethylene (PEX) Tubing
This standard is issued under the fixed designation F2854; 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 crosslinked polyethylene (PEX) push-fit mechanical fittings for use with crosslinked polyethylene
1 3 1
(PEX) tubing in ⁄2, ⁄4, 1 and 1 ⁄4 in. nominal diameters that meet the requirements of Specification F876. These fittings are
intended for use in residential and commercial, hot and cold, potable water distribution systems as well as hydronic heating,
including under-floor heating systems, up to and including 100 psig (6.90 bar) and 180 °F (82 °C). Included are the requirements
for materials, workmanship, dimensions, performance, and markings to be used on the fittings.
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 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.
1.4 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:
A269/A269M Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service
A276/A276M Specification for Stainless Steel Bars and Shapes
A312/A312M Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
A351/A351M Specification for Castings, Austenitic, for Pressure-Containing Parts
B16/B16M Specification for Free-Cutting Brass Rod, Bar and Shapes for Use in Screw Machines
B140/B140M Specification for Copper-Zinc-Lead (Red Brass or Hardware Bronze) Rod, Bar, and Shapes
B283/B283M Specification for Copper and Copper-Alloy Die Forgings (Hot-Pressed)
B371/B371M Specification for Copper-Zinc-Silicon Alloy Rod
B395/B395M Specification for U-Bend Seamless Copper and Copper Alloy Heat Exchanger and Condenser Tubes
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 Dec. 1, 2020May 1, 2021. Published January 2021May 2021. Originally approved in 2010. Last previous edition approved in 202062020 as
F2854–20.–20a. DOI: 10.1520/F2854–20A.10.1520/F2854–21.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
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F2854 − 21
D618 Practice for Conditioning Plastics for Testing
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D1505 Test Method for Density of Plastics by the Density-Gradient Technique
D1599 Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and Fittings
D1600 Terminology for Abbreviated Terms Relating to Plastics
D2000 Classification System for Rubber Products in Automotive Applications
D2122 Test Method for Determining Dimensions of Thermoplastic Pipe and Fittings
D2765 Test Methods for Determination of Gel Content and Swell Ratio of Crosslinked Ethylene Plastics
D2837 Test Method for Obtaining Hydrostatic Design Basis for Thermoplastic Pipe Materials or Pressure Design Basis for
Thermoplastic Pipe Products
D6284 Test Method for Rubber Property—Effect of Aqueous Solutions with Available Chlorine and Chloramine
D6394 Classification System for and Basis for Specification for Sulfone Plastics (SP)
F412 Terminology Relating to Plastic Piping Systems
F876 Specification for Crosslinked Polyethylene (PEX) Tubing
F877 Specification for Crosslinked Polyethylene (PEX) Hot- and Cold-Water Distribution Systems
F2023 Test Method for Evaluating the Oxidative Resistance of Crosslinked Polyethylene (PEX) Pipe, Tubing and Systems to
Hot Chlorinated Water
F2159 Specification for Plastic Insert Fittings Utilizing a Copper Crimp Ring, or Alternate Stainless Steel Clamps for SDR9
Crosslinked Polyethylene (PEX) Tubing and SDR9 Polyethylene of Raised Temperature (PE-RT) Tubing
F2735 Specification for Plastic Insert Fittings For SDR9 Cross-linked Polyethylene (PEX) and Polyethylene of Raised
Temperature (PE-RT) Tubing
F3348 Specification for Plastic Press Insert Fittings with Factory Assembled Stainless Steel Press Sleeve for SDR9 Cross-linked
Polyethylene (PEX) Tubing and SDR9 Polyethylene of Raised Temperature (PE-RT) Tubing
2.2 PPI Standards:
PPI TR-3 Policies and Procedures for Developing Hydrostatic Design Basis (HDB), Pressure Design Basis (PDB), Strength
Design Basis (SDB), and Minimum Required Strength (MRS) Ratings for Thermoplastic Piping Materials or Pipe
2.3 NSF Standard:
NSF Standard No. 14 for Plastic Piping Components and Related Materials
2.4 EN Standards:
EN 12164 Copper and copper alloys - Rod for free machining purposes
EN 12165 Copper and copper alloys - Wrought and unwrought forging stock
EN 12168 Copper and copper alloys - Hollow rod for free machining purposes
2.5 ISO Standards:
ISO 9080 Plastics piping and ducting systems -- Determination of the long-term hydrostatic strength of thermoplastics materials
in pipe form by extrapolation
ISO 12162 Thermoplastics materials for pipes and fittings for pressure applications –Classification, designation and design
coefficient
3. Terminology
3.1 Definitions are in accordance with Terminology F412 and abbreviations are in accordance with Terminology D1600, unless
otherwise indicated.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 push-fit fitting—A type of fitting that joins pipes that are not caulked, threaded, soldered, cemented, brazed or welded. These
joints consist of elastomeric seals and tube grippers. Such joints must be installed in accordance to the manufacturer’s instructions.
4. Classification
4.1 This specification covers PEX bodied push-fit fittings suitable for use with PEX tubing that meets the requirements of
Specification F876.
Available from Plastics Pipe Institute (PPI), 105 Decker Court, Suite 825, Irving, TX 75062, http://www.plasticpipe.org.
Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann Arbor, MI 48113-0140, http://www.nsf.org.
Available from European Committee for Standardization (CEN), 36 rue de Stassart, B-1050, Brussels, Belgium, http://www.cenorm.be.
Available from International Organization for Standardization (ISO), 1, ch. de la Voie-Creuse, Case postale 56, CH-1211, Geneva 20, Switzerland, http://www.iso.ch.
F2854 − 21
5. Materials and Manufacture
5.1 Fitting Body—The fitting body shall be made from crosslinked polyethylene compounds suitable for elevated temperature
pressure service.
NOTE 1—Since fittings specified by this standard will be used in hot and cold water plumbing systems, a material used to manufacture fittings in
accordance with this specification must demonstrate qualities consistent with that application in addition to the fitting performance requirements of this
specification. Those qualifying characteristics include, but are not limited to, an established hydrostatic design basis (HDB) or stress design basis (SDB)
in accordance with PPI TR-3, or an ISO 9080 compliant minimum required stress (MRS), or similar rating.
5.2 Tubular Stiffener—If required by the manufacturer, a tubular stiffener shall be used. It shall support the PEX tubing at least
in the areas of sealing and gripping. Split stiffeners shall not be used. The stiffener shall be made from one of the following:
5.2.1 Machined Brass—Machined brass stiffeners shall be made from material meeting the requirements of Specification
B371/B371M copper alloy UNS No. C69850 or UNS No. C69300, Specification B140/B140M copper alloy UNS No. C31400,
Specification B283/B283M copper alloy UNS No. C37700, Specification B16/B16M copper-alloy UNS C36000 or copper alloy
UNS C38500 or DIN 17660 – CuZn39Pb3, Standard EN 12168 copper Alloy CW614N, Standard EN 12164 copper Alloy
CW614N or copper alloy UNS No. C35330, or Standard EN 12165 copper Alloy CW617N.
5.2.2 Machined Stainless Steel—Machined stainless steel stiffeners shall be made from material meeting the requirements of
Specification A312/A312M stainless steel alloy 304, 304L, 316 or 316L, (UNS Nos. S30400, S30403, S31600 or S31603),
Specification A269/A269M stainless steel alloy 304, 304L, 316, 316L (UNS Nos. S30400, S30403, S31600 or S31603),
Specification A276/A276M stainless steel alloy 304, 401L, 316, or 316L (UNS Nos. S30400, S30403, S31600 or S31603), or
Specification A351/A351M stainless steel UNS No. J92800.
5.2.3 Polysulfone—Polysulfone stiffeners shall be molded from sulfone plastic (SP) as specified in Specification D6394. The
material shall be unreinforced polysulfone (group 01, class 1, grade 0).
NOTE 2—Since fittings specified by this standard will be used in hot-and-cold water plumbing systems (also noted for Specifications F2159, F2735, and
F3348), a material used to manufacture fittings in accordance with this specification must demonstrate qualities consistent with that application in addition
to the performance requirements of this specification. Those qualifying characteristics include, but are not limited to, an established hydrostatic design
basis (HDB) or stress design basis (SDB) in accordance Test Method D2837 pressure design basis ( PDB) or ISO 9080/ ISO 12162 compliant minimum
required stress (MRS) and a demonstration of resistance to the long-term effects of those chemicals normally found in potable water at the maximum
temperature stated in this specification.
5.3 O-rings—O-rings shall be made from an elastomeric material with a minimum tensile strength of 1450 psi (10.0 MPa) as
classified in Classification D2000 and shall meet the performance requirements of 6.10.
5.4 Tube grippers—Metallic components in the tube grippers shall be made of Series 300 stainless steel.
5.5 Potable Water Requirements—Products intended for contact with potable water shall be evaluated, tested, and certified for
conformance with the health effects portion of NSF Standard No. 14 by an acceptable certifying organization when required by
the regulatory authority having jurisdiction.
6. Performance Requirements
6.1 General—Unless otherwise stated, all performance tests shall be performed on the number of fittings required to obtain six
mechanical ends assembled with PEX tubing. PEX tubing used for testing purposes shall meet the requirements of Specification
F876. All assemblies used for test specim
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