kSIST FprEN 17152-1:2026

• Abstract:

  This document gives the definitions and specifies the minimum requirements for injection moulded, extruded and thermoformed thermoplastics boxes, including integral components, used in underground systems for infiltration, attenuation and storage of surface water (e.g. storm water) and manufactured from polypropylene (PP) or unplasticized polyvinylchloride (PVC-U).; NOTE Non load bearing component(s) of boxes can be manufactured by various methods e.g. extrusion, injection moulding, rotational moulding, thermoforming and low-pressure injection moulding.; Product properties are determined by a combination of material specifications, design and manufacturing process.; Boxes are intended for use in landscape, pedestrian or vehicular traffic areas.; Boxes can either be factory assembled, or site assembled from different components.; Boxes are intended to be used as elements in a modular system where the manufacturer states in the documentation how the boxes are assembled to create a complete infiltration, attenuation or storage system.

• Status: Not Published
• Public Enquiry End Date: 04-Mar-2026
• ICS: 23.040.01 - Pipeline components and pipelines in general
• ICS: 23.040.03 - Pipeline and its parts for external water conveyance systems
• Technical Committee: PCV - Plastic pipes, fittings and valves
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 26-Oct-2026
• Due Date: 14-Dec-2026
• Completion Date: 27-Oct-2026
• Ref Project: FprEN 17152-1 - Plastics piping systems for non-pressure underground conveyance and storage of surface water - Boxes used for infiltration, attenuation and storage systems - Part 1: Specifications for boxes made of PP and PVC-U

• Revises: SIST EN 17152-1:2019 - Plastics piping systems for non-pressure underground conveyance and storage of non-potable water - Boxes used for infiltration, attenuation and storage systems - Part 1: Specifications for storm water boxes made of PP and PVC-U
• Effective Date: 08-Oct-2025

kSIST FprEN 17152-1:2026 is the SIST publication of the draft European Standard for plastic boxes used in underground infiltration, attenuation and storage systems for surface water. It specifies definitions, minimum requirements and test-related documentation for boxes made of PP and PVC-U, for manufacturers, designers, test laboratories and buyers checking product suitability.

What does kSIST FprEN 17152-1:2026 specify?

kSIST FprEN 17152-1:2026 specifies the boxes used as elements in modular underground systems for surface water, including storm water. It covers injection moulded, extruded and thermoformed thermoplastics boxes, including integral components, and it is written for buried use in landscape, pedestrian or vehicular traffic areas.

The document is organized into clauses on scope, references, terms, symbols, materials, general characteristics, geometry, mechanical characteristics, physical characteristics for injection moulded boxes, and marking plus additional documentation. It also has two normative annexes.

Annex	What it covers
Annex A	Material characteristics for PP and PVC-U, including the agreed specification between manufacturer and supplier
Annex B	Test method for checking sensitivity to non-rigid loading, including the rubber-sheet test setup

The boxes may be factory assembled or site assembled from different components. The manufacturer has to state in the documentation how the components are assembled to create a complete infiltration, attenuation or storage system.

What are the key requirements of kSIST FprEN 17152-1:2026?

kSIST FprEN 17152-1:2026 ties product performance to material, geometry, mechanical behaviour and documentation. In practice, that means the manufacturer has to declare what the product is made of, how it is built, how it is tested, and what structural values can be used in design.

Material requirements

Clause 5 limits the base materials to PP or PVC-U, with additives needed for manufacture or to improve performance. For PP, the final compound shall contain at least 50 % PP by mass, and if calcium carbonate is used it shall be coated calcium carbonate. Reinforcing materials may be used, but their amount has to be declared.

The material for boxes and integral components shall have an agreed specification between the supplier and the manufacturer. Annex A then links that material specification to the tests used to fingerprint the material and confirm long-term performance.

General appearance and geometry

Clause 6 requires internal and external surfaces to be smooth, clean and free from defects that could affect conformity. Sharp edges on the external surface should be avoided, because they can affect handling and installation.

Clause 7 requires dimensions to be measured to EN ISO 3126 with 1 mm accuracy, and the declared length, width, height and functional dimensions shall be met within the declared tolerances. Weight is measured to 0.1 %, and the box weight shall be greater than 98 % of the reference weight. Porosity shall be declared to the nearest 1 %, using the formula in Clause 7, because porosity directly affects storage capacity.

Mechanical performance

Clause 8 is the main performance section. Short-term compression strength is checked in the X, Y and Z directions with EN 17150, with at least three specimens for each direction. The reference value used in the standard is the one-tailed 95 % lower confidence limit, so the declared structural value is based on conservative test data.

Long-term compression strength is required in the vertical direction for all boxes, and in the lateral direction for attenuation and storage boxes. The long-term values are extrapolated to 50 years using prEN 17151-1. This matters because the box is intended to stay buried and carry loads for long periods, not just pass a short test.

Clause 8 also includes optional checks for ultimate lateral deflection, lateral compliance and creep behaviour. Annex B adds a separate check for sensitivity to non-rigid loading by comparing rigid-plate compression with compression using an interlayer of rubber sheets.

Physical characteristics for injection moulded boxes

Clause 9 applies to injection moulded boxes. It checks the effects of heating on the area around injection points, including cracks, delamination or blisters, and it limits how far those defects may extend into the wall. All integral components have to be tested, because the moulded joint area can be critical in service.

Marking and documentation

Clause 10 requires durable marking that stays legible after storage, weathering, handling and installation. The marking shall not create cracks or other defects that could weaken the box.

The manufacturer shall also provide key product information, including material, intended use, colour, declared structural strengths, porosity, dimensions and reference weight. The documentation also has to explain how the components are assembled into the complete modular system and how multilayer design affects declared strength.

What terms does kSIST FprEN 17152-1:2026 define?

kSIST FprEN 17152-1:2026 defines the main product and performance terms used to specify these boxes.

• Box - a thermoplastic cuboid-shaped element, with or without sidewalls, used to create a modular system.
• Integral component - a load-bearing component that contributes to the overall strength of the box.
• Modular system - a system made of repeating boxes.
• Porosity - the ratio of available water storage volume to the total envelope cuboid volume of a box.
• Long-term compression strength - the 95 % lower confidence limit of the applied stress for which the sample would survive 50 years without creep rupture.
• Reference value - the value obtained on the material used for the long-term test specimen according to prEN 17151-1.
• Declared value - the value declared by the manufacturer, which cannot be higher than the reference value.
• PP - polypropylene.
• PVC-U - unplasticized polyvinylchloride.
• OIT - oxidation induction time.

Who uses kSIST FprEN 17152-1:2026?

kSIST FprEN 17152-1:2026 is used by manufacturers of surface-water infiltration, attenuation and storage boxes, and by suppliers of PP and PVC-U materials. It is also used by testing laboratories and conformity-assessment bodies that need defined specimen preparation, test methods and acceptance criteria.

Designers and engineers use it when specifying modular underground storage systems for landscape, pedestrian or vehicular traffic areas. Buyers and quality managers use it to check that the declared material, strength, porosity and marking data are complete enough for procurement and acceptance.

What changed in kSIST FprEN 17152-1:2026 from the previous edition?

kSIST FprEN 17152-1:2026 supersedes EN 17152-1:2019+AC:2020. The foreword states these changes compared with that edition:

• Table A.1 adds the minimum number of test specimens.
• Table 2 adds new optional tests.
• Clause 3 adds new definitions, including reference value and declared value.
• The document now refers to the improved prEN 17151-1.
• Subclause 10.2 has been expanded with more information.
• Editorial improvements were made throughout the document.

Which standards are used with kSIST FprEN 17152-1:2026?

kSIST FprEN 17152-1:2026 relies on a set of test and terminology standards for material identification, mechanical testing and geometric measurement.

Standard	What it contributes
EN 17150:2019	Short-term compression strength test for boxes
prEN 17151-1:2025	Long-term compression strength test for boxes
prEN 17151-2:2025	Creep behaviour test for boxes
CEN/TS 17152-4:2025	Guidance for structural design of modular systems and lateral compliance context
EN ISO 179-1	Charpy impact properties
EN ISO 306	Vicat softening temperature
EN ISO 472:2013	Plastics vocabulary
EN ISO 527-1 / -2 / -3	Tensile properties and test conditions
EN ISO 580:2005	Visual assessment of heating effects
EN ISO 899-1 / -2	Creep behaviour tests
EN ISO 1043-1:2011	Polymer symbols and abbreviated terms
EN ISO 1133-1	Melt mass-flow rate and melt volume-flow rate
EN ISO 1167-1 / -2	Internal pressure testing and specimen preparation
EN ISO 1183-1	Density measurement
EN ISO 3126	Component dimensions
EN ISO 3451-1 / -5	Ash determination
EN ISO 11357-3	DSC melting and crystallization
EN ISO 11357-6	OIT and oxidation induction temperature
EN ISO 11358-1	Thermogravimetry
EN ISO 13229	Viscosity number and K-value for PVC-U

What does the kSIST FprEN 17152-1:2026 document contain?

kSIST FprEN 17152-1:2026 contains a material test table, a mechanical performance table, a physical test table for injection moulded boxes, and a marking table. It also contains Figure 1 for the X, Y and Z test directions, which helps users apply the compression tests in a consistent orientation.

Annex A gives the material characteristics to be checked for PP and PVC-U, plus the agreed specification between manufacturer and supplier. Annex B gives the rubber-sheet test arrangement for sensitivity to non-rigid loading, including the apparatus layout and rubber-sheet characteristics.

The document also includes the formulas and test descriptions needed to determine porosity, compression performance and long-term structural values. In practice, that supports product development, type testing, documentation and conformity assessment for modular underground surface-water systems.

SLOVENSKI STANDARD
oSIST prEN 17152-1:2026
01-marec-2026
Cevni sistemi iz polimernih materialov, ki delujejo po težnostnem principu in so
položeni v zemljo, za transport in shranjevanje nepitne vode - Zaboji za sisteme
infiltriranja, reduciranja in hrambe - 1. del: Specifikacije za zaboje, iz PP in PVC-U
Plastics piping systems for non-pressure underground conveyance and storage of
surface water - Boxes used for infiltration, attenuation and storage systems - Part 1:
Specifications for boxes made of PP and PVC-U
Kunststoff-Rohrleitungssysteme für die drucklose unterirdische Entwässerung für Nicht-
Trinkwasser - Versickerungsblöcke zur Verwendung in Infiltrations-, Zwischenspeicher-
und Speichersystemen - Teil 1: Festlegungen für Regenwasserabfluss-
Versickerungsblöcke aus PP und PVC-U
Systèmes de canalisations en plastique pour le transport et le stockage souterrains sans
pression des eaux de surface - Structures alvéolaires ultra-légères pour les systèmes
d’infiltration, de rétention et de stockage - Partie 1 : Spécifications relatives aux
structures alvéolaires ultra-légères fabriquées à partir de PP et de PVC-U
Ta slovenski standard je istoveten z: prEN 17152-1
ICS:
23.040.03 Cevovodi za zunanje sisteme Pipeline and its parts for
transporta vode in njihovi deli external water conveyance
systems
oSIST prEN 17152-1:2026 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 17152-1:2026
oSIST prEN 17152-1:2026
DRAFT
EUROPEAN STANDARD
prEN 17152-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2025
ICS 23.040.01 Will supersede EN 17152-1:2019
English Version
Plastics piping systems for non-pressure underground
conveyance and storage of surface water - Boxes used for
infiltration, attenuation and storage systems - Part 1:
Specifications for boxes made of PP and PVC-U
Systèmes de canalisations en plastique pour le Kunststoff-Rohrleitungssysteme für die drucklose
transport et le stockage souterrains sans pression des unterirdische Entwässerung für Nicht-Trinkwasser -
eaux de surface - Structures alvéolaires ultra-légères Versickerungsblöcke zur Verwendung in Infiltrations-,
pour les systèmes d'infiltration, de rétention et de Zwischenspeicher- und Speichersystemen - Teil 1:
stockage - Partie 1 : Spécifications relatives aux Festlegungen für Regenwasserabfluss-
structures alvéolaires ultra-légères fabriquées à partir Versickerungsblöcke aus PP und PVC-U
de PP et de PVC-U
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 155.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17152-1:2025 E
worldwide for CEN national Members.

oSIST prEN 17152-1:2026
prEN 17152-1:2025 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Symbols and abbreviations . 8
5 Material . 9
5.1 General . 9
5.2 Polypropylene (PP) . 9
5.3 Unplasticized polyvinylchloride (PVC-U) . 9
5.4 Box and integral components material characteristics . 9
6 General characteristics . 10
6.1 Appearance . 10
6.2 Colour . 11
7 Geometrical characteristics . 11
7.1 Dimensions . 11
7.2 Weight . 11
7.3 Porosity . 11
8 Mechanical characteristics of boxes and integral components . 11
9 Physical characteristics of injection moulded boxes . 13
10 Marking and additional documentation . 14
10.1 General . 14
10.2 Additional documentation . 14
10.3 Minimum required marking of infiltration, storage and attenuation boxes . 15
Annex A (normative) Characteristics of materials used in boxes and integral components for
PP and PVC-U . 16
A.1 Material characteristics . 16
A.2 Agreed specification between the manufacturer and the supplier of PP and PVC-U
materials . 17
Annex B (normative) Test method to check the sensitivity to non-rigid loading . 19
B.1 General . 19
B.2 Apparatus and test setup . 19
Bibliography . 21

oSIST prEN 17152-1:2026
prEN 17152-1:2025 (E)
European foreword
This document (prEN 17152-1:2025) has been prepared by Technical Committee CEN/TC 155 “Plastics
piping systems and ducting systems”, the secretariat of which is held by NEN.
This document is currently submitted to the CEN Enquiry.
This document supersedes EN 17152-1:2019+AC:2020.
The main changes with respect to EN 17152-1:2019+AC:2020 are listed below:
— Table A.1 added minimum number of test specimen;
— Table 2 new optional tests added;
— Clause 3 new definitions added (e.g. reference value and declared value);
— reference to new improved prEN 17151-1;
— subclause 10.2 improved with more information;
— editorial improvements through the document.
This standard is supported by separate standards on test methods to which normative references are
made.
EN 17152-series consists of the following parts under the general title Plastics piping systems for non-
pressure underground conveyance and storage of surface water - Boxes used for infiltration, attenuation
and storage systems:
— Part 1: Specifications for boxes made of PP and PVC-U [this document];
— Part 3: Assessment of conformity (CEN/TS);
— Part 4: Guidance for structural design of modular systems (CEN/TS).
Recommended practices for installation are described in CEN/TR 17179 [1].
These products are always used in a modular system consisting of multiple boxes.
National standards for pipes and fittings for the transport of surface water are not considered to be
conflicting with this standard and can thus be allowed to coexist.

oSIST prEN 17152-1:2026
prEN 17152-1:2025 (E)
Introduction
The products covered by this document are part of surface water management system.
This document is intended to reflect the current state of knowledge of determining and predicting the
long-term lifetime of product groups mentioned in the scope while maintaining reasonable testing times
for producers and developers of these systems.

oSIST prEN 17152-1:2026
prEN 17152-1:2025 (E)
1 Scope
This document gives the definitions and specifies the minimum requirements for injection moulded,
extruded and thermoformed thermoplastics cuboid shaped boxes, including integral components, used
in underground systems for infiltration, attenuation and storage of surface water (e.g. storm water) and
manufactured from polypropylene (PP) or unplasticized polyvinylchloride (PVC-U).
Product properties are determined by a combination of material specifications, design and
manufacturing process.
These boxes are intended for buried underground use, e.g. in landscape, pedestrian or vehicular traffic
areas.
A box can either be factory assembled, or site assembled from different components.
These boxes are intended to be used as elements in a modular system where the manufacturer states in
the documentation how the components are assembled to create a complete infiltration, attenuation or
storage system.
NOTE Non load bearing component(s) can be manufactured by various methods e.g. extrusion, injection
moulding, rotational moulding, thermoforming and low-pressure injection moulding.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 17150:2019, Plastics piping systems for non-pressure underground conveyance and storage of non-
potable water — Test method for determination of short-term compression strength of boxes
prEN 17151-1:2025, Plastics piping systems for non-pressure underground conveyance and storage of
surface water — Part 1: Test method for determination of long-term compression strength of boxes
prEN 17151-2:2025, Plastics piping systems for non-pressure underground conveyance and storage of
surface water — Part 2: Test method for determination of creep behaviour of boxes
CEN/TS 17152-4:2025, Plastics piping systems for non-pressure underground conveyance and storage of
non-potable water — Boxes used for infiltration, attenuation and storage systems — Part 4: Guidance for
structural design of modular systems
EN ISO 179-1, Plastics — Determination of Charpy impact properties — Part 1: Non-instrumented impact
test (ISO 179-1)
EN ISO 306, Plastics — Thermoplastic materials — Determination of Vicat softening temperature (VST)
(ISO 306)
EN ISO 472:2013, Plastics — Vocabulary (ISO 472/2013)
EN ISO 527-1, Plastics — Determination of tensile properties — Part 1: General principles (ISO 527-1)
EN ISO 527-2, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and
extrusion plastics (ISO 527-2)
EN ISO 527-3, Plastics — Determination of tensile properties — Part 3: Test conditions for films and sheets
(ISO 527-3)
oSIST prEN 17152-1:2026
prEN 17152-1:2025 (E)
EN ISO 580:2005, Plastics piping and ducting systems — Injection-moulded thermoplastics fittings -
Methods for visually assessing the effects of heating (ISO 580:2005)
EN ISO 899-1, Plastics — Determination of creep behaviour — Part 1: Tensile creep (ISO 899-1)
EN ISO 899-2, Plastics — Determination of creep behaviour — Part 2: Flexural creep by three-point loading
(ISO 899-2)
EN ISO 1043-1:2011, Plastics — Symbols and abbreviated terms — Part 1: Basic polymers and their
special characteristics (ISO 1043-1:2011)
EN ISO 1133-1, Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate
(MVR) of thermoplastics — Part 1: Standard method (ISO 1133-1)
EN ISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination
of the resistance to internal pressure — Part 1: General method (ISO 1167-1)
EN ISO 1167-2, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination
of the resistance to internal pressure — Part 2: Preparation of pipe test pieces (ISO 1167-2)
EN ISO 1183-1, Plastics — Methods for determining the density of non-cellular plastics — Part 1: Immersion
method, liquid pyknometer method and titration method (ISO 1183-1)
EN ISO 3126, Plastics piping systems — Plastics components — Determination of dimensions (ISO 3126)
EN ISO 3451-1, Plastics — Determination of ash — Part 1: General methods (ISO 3451-1)
EN ISO 3451-5, Plastics — Determination of ash — Part 5: Poly(vinyl chloride) (ISO 3451-5)
EN ISO 11357-3, Plastics — Differential scanning calorimetry (DSC) — Part 3: Determination of
temperature and enthalpy of melting and crystallization (ISO 11357-3)
EN ISO 11357-6, Plastics — Differential scanning calorimetry (DSC) — Part 6: Determination of oxidation
induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT) (ISO 11357-6)
EN ISO 11358-1, Plastics — Thermogravimetry (TG) of polymers — Part 1: General principles
(ISO 11358-1)
EN ISO 13229, Thermoplastics piping systems for non-pressure applications — Unplasticized poly(vinyl
chloride) (PVC-U) pipes and fittings — Determination of the viscosity number and K-value (ISO 13229)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 472:2013, EN ISO 1043-
1:2011 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp

As impacted by EN ISO 1043-1:2011/A1:2016.
oSIST prEN 17152-1:2026
prEN 17152-1:2025 (E)
3.1
box
thermoplastic cuboid shaped element, with or without sidewalls, used to create a modular system
3.2
integral component
load bearing component contributing to the overall strength of the box
3.3
modular system
system made of repeating boxes
3.4
attenuation system
modular system designed to reduce the peak flow from a given site by providing a temporary
underground surface water storage facility
3.5
infiltration system
modular system designed to provide a temporary underground storage facility from which surface water
soaks into the surrounding ground
3.6
storage system
modular system designed to provide an underground storage facility for surface water
3.7
porosity
total available volume for water storage divided by the total envelope cuboid volume for a box
3.8
long-term compression strength
95 % lower confidence limit (LCL) of the applied stress for which the sample would survive 50 years
without creep rupture, in kN/m
3.9
material
material specified for a particular component in a box
3.10
virgin material
plastics material in the form of pellets, granules, powder, floc, etc. that has not been subjected to use or
processing other than that required for its initial manufacture
Note 1 to entry: Does not contain any reworked plastics material and/or plastics recyclate.
Note 2 to entry: Sometimes also referred to as “primary material” or “primary plastics feedstock”.
Note 3 to entry: It is understood that the addition of additives such as stabilizers and pigments is still resulting
into a virgin (plastics) material.
[SOURCE: EN 14541-1:2022]
...