ASTM F2021-17(2022)
(Guide)Standard Guide for Design and Installation of Plastic Siphonic Roof Drainage Systems
Standard Guide for Design and Installation of Plastic Siphonic Roof Drainage Systems
SIGNIFICANCE AND USE
4.1 The information provided in this standard guide is intended for use by designers and specifiers of siphonic roof drainage systems and their related components. Specifically, this guide addresses the use and limitations of plastic pipe and fittings in siphonic roof drainage systems where internal operating pressures are typically sub-atmospheric.
SCOPE
1.1 This guide covers design and installation considerations for plastic siphonic roof drain systems for industrial, commercial, public, and residential buildings. Requirements for materials, pipe, and fittings are included.
1.2 The interchangeability of pipe and fittings made by different manufacturers is not addressed in this guide. Transition fittings for joining pipe and fittings of different manufacturers is provided for in the referenced pipe and fitting specification.
1.3 In referee decisions, the SI units shall be used for metric-sized pipe and inch-pound units for pipe sized in the IPS system (ANSI B36.10). In all cases, the values given in parentheses are for information only.
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
Relations
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: F2021 − 17 (Reapproved 2022) An American National Standard
Standard Guide for
Design and Installation of Plastic Siphonic Roof Drainage
Systems
This standard is issued under the fixed designation F2021; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* D2665Specification for Poly(Vinyl Chloride) (PVC) Plastic
Drain, Waste, and Vent Pipe and Fittings
1.1 This guide covers design and installation considerations
D2949Specification for 3.25-in. Outside Diameter Poly(Vi-
for plastic siphonic roof drain systems for industrial,
nyl Chloride) (PVC) Plastic Drain, Waste, and Vent Pipe
commercial, public, and residential buildings. Requirements
and Fittings
for materials, pipe, and fittings are included.
D3034Specification for Type PSM Poly(Vinyl Chloride)
1.2 The interchangeability of pipe and fittings made by
(PVC) Sewer Pipe and Fittings
different manufacturers is not addressed in this guide. Transi-
D3350Specification for Polyethylene Plastics Pipe and Fit-
tion fittings for joining pipe and fittings of different manufac-
tings Materials
turers is provided for in the referenced pipe and fitting
E84Test Method for Surface Burning Characteristics of
specification.
Building Materials
E814Test Method for Fire Tests of Penetration Firestop
1.3 In referee decisions, the SI units shall be used for
metric-sizedpipeandinch-poundunitsforpipesizedintheIPS Systems
E1966Test Method for Fire-Resistive Joint Systems
system (ANSI B36.10). In all cases, the values given in
parentheses are for information only. E2393Practice for On-Site Inspection of Installed Fire
Resistive Joint Systems and Perimeter Fire Barriers
1.4 This international standard was developed in accor-
F412Terminology Relating to Plastic Piping Systems
dance with internationally recognized principles on standard-
F628 Specification for Acrylonitrile-Butadiene-Styrene
ization established in the Decision on Principles for the
(ABS) Schedule 40 Plastic Drain, Waste, and Vent Pipe
Development of International Standards, Guides and Recom-
With a Cellular Core (Withdrawn 2021)
mendations issued by the World Trade Organization Technical
F714Specification for Polyethylene (PE) Plastic Pipe (DR-
Barriers to Trade (TBT) Committee.
PR) Based on Outside Diameter
F891Specification for Coextruded Poly(Vinyl Chloride)
2. Referenced Documents
2 (PVC) Plastic Pipe With a Cellular Core
2.1 ASTM Standards:
F1901Specification for Polyethylene (PE) Pipe and Fittings
D696TestMethodforCoefficientofLinearThermalExpan-
for Roof Drain Systems
sion of Plastics Between −30°C and 30°C with a Vitreous
2.2 ANSI/ASME Standards:
Silica Dilatometer
A112.20.2 Qualification of Installers of Firestop Systems
D1600TerminologyforAbbreviatedTermsRelatingtoPlas-
and Devices for Piping Systems
tics
A112.6.4Roof, Deck and Balcony Drains
D1785Specification for Poly(Vinyl Chloride) (PVC) Plastic
A112.6.9Siphonic Roof Drains
Pipe, Schedules 40, 80, and 120
B36.10Standard Dimensions of Steel Pipe (IPS)
D2661 Specification for Acrylonitrile-Butadiene-Styrene
2.3 ANSI/UL Standard:
(ABS) Schedule 40 Plastic Drain, Waste, and Vent Pipe
UL-1479 (see Test Method E814)
and Fittings
2.4 Other References:
International Building Code (IBC)
This guide is under the jurisdiction ofASTM Committee F17 on Plastic Piping
International Plumbing Code (IPC)
Systems and is the direct responsibility of Subcommittee F17.63 on DWV.
Current edition approved Feb. 1, 2022. Published March 2022. Originally
approved in 2000. Last previous edition approved in 2017 as F2021–17. DOI: The last approved version of this historical standard is referenced on
10.1520/F2021-17R22. www.astm.org.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 4th Floor, New York, NY 10036, http://www.ansi.org.
Standards volume information, refer to the standard’s Document Summary page on Available from International Code Council (ICC), 500 New Jersey Ave., NW,
the ASTM website. 6th Floor, Washington, DC 20001, http://www.iccsafe.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
F2021 − 17 (2022)
Uniform Plumbing Code (UPC) 5.1.3 Specific types of PE pipe include but are not limited
NFPA 5000 Building Code to: D3350, F714, and F1901.
5.2 Pipe Wall Thickness and Composition—Refer to the
3. Terminology
governing plumbing code for the pipe wall thicknesses speci-
3.1 Definitions—Terms and abbreviations as described in
fied for approved pipe materials. Cellular-core plastic pipe (for
Terminologies F412 and D1600, respectively, shall apply in
example, Specifications F628 and F891) shall be avoided
this guide. General terminology pertaining to roof drains as
unless the respective pipe product manufacturer can certify by
described inANSI/ASMEA112.6.4 andASMEA112.6.9 shall
testing that the pipe product can withstand full vacuum
also apply in this guide.
internally without collapse. Solid wall plastic pipe of wall
thickness of Schedule 40 or greater (including the equivalent
3.2 Definitions of Terms Specific to This Standard:
SDR thickness) is adequate for siphonic roof drain system
3.2.1 crown, n—theelevationofthetopofapipeinnerwall.
sub-atmospheric pressure regimes. Pipe wall thicknesses less
3.2.2 drain, n—any pipe which carries rain water, waste
than Schedule 40 shall not be specified.
water or waterborne wastes in a building drainage system.
5.3 Hangers,SupportsandBracing—Refertothegoverning
3.2.3 drainage system, n—includes all the piping within
plumbingcodeforpipesupportrequirements.Iflocalcodesdo
public or private premises, which conveys sewage, rain water,
notaddresspipesupport,supportplasticpipeeveryfourfeeton
or other liquid wastes to a legal point of disposal. It does not
centerandateverychangeindirection.Braceplasticpipewith
include the mains of public sewer treatment or disposal plants.
lateralrestraintseverythirtyfeetoncenterandateverychange
3.2.4 siphonic roof drain, n—a roof drain with a fixed
in direction for hanger rods longer than 18 in.
device allowing water to enter without the ingress of air that
sustains a negative differential fluid head within the pipe 5.4 Thermal Displacement and Expansion Fittings:
system thereby inducing flow without pipe gradient (pitch).
5.4.1 The normal mode of thermal transition in siphonic
roof drainage systems is from room temperature to a 40°F
4. Significance and Use
(4.4°C) minimum resulting in an overall contraction of plastic
pipinginsiphonicroofdrainagesystems.Thisoccurswhenthe
4.1 The information provided in this standard guide is
intended for use by designers and specifiers of siphonic roof warm pipe in a heated building is filled with a cold rain.
Therefore, a total temperature difference of 50°F (10°C) shall
drainage systems and their related components. Specifically,
thi
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