oSIST prEN 12566-1:2018

SLOVENSKI STANDARD
01-december-2018
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Small wastewater treatment systems for up to 50 PT - Part 1: Prefabricated septic tanks
Kleinkläranlagen für bis zu 50 EW - Teil 1: Werkmäßig hergestellte Faulgruben
Petites installations de traitement des eaux usées pour une population totale équivalente
(PTE) jusqu’à 50 habitants - Partie 1 : Fosses septiques prêtes à l’emploi et/ou
assemblées sur site
Ta slovenski standard je istoveten z: prEN 12566-1
ICS:
13.060.30 Odpadna voda Sewage water
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2018
ICS 13.060.30 Will supersede EN 12566-1:2016
English Version
Small wastewater treatment systems for up to 50 PT - Part
1: Prefabricated septic tanks
Petites installations de traitement des eaux usées pour Kleinkläranlagen für bis zu 50 EW - Teil 1: Werkmäßig
une population totale équivalente (PTE) jusqu'à 50 hergestellte Faulgruben
habitants - Partie 1 : Fosses septiques prêtes à l'emploi
et/ou assemblées sur site
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 165.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12566-1:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
3.1 Terms and definitions . 8
3.2 Symbols and abbreviated terms . 8
4.1 Design . 9
4.1.1 General. 9
4.1.2 Inlets, outlets and connections . 9
4.1.3 Ventilation . 9
4.1.4 Access . 9
4.1.5 Extension shaft . 9
4.1.6 Sizing Basis . 10
4.1.7 Overall dimensions . 10
4.2 Load bearing capacity . 10
4.2.1 General. 10
4.2.2 Load bearing capacity determined by calculation . 11
4.2.3 Load bearing capacity determined by testing . 12
4.3 Hydraulic efficiency . 14
4.4 Watertightness . 14
4.4.1 General. 14
4.4.2 Water loss . 15
4.4.3 Pressure variation . 15
4.5 Durability . 15
4.5.1 General. 15
4.5.2 Concrete . 15
4.5.3 Steel. 15
4.5.4 Unplasticized polyvinyl chloride (PVC-U) . 16
4.5.5 Polyethylene (PE) . 16
4.5.6 Glass reinforced plastic (GRP) . 17
4.5.7 Polypropylene (PP) . 17
4.5.8 Polydicyclopentadiene (PDCPD) . 18
4.5.9 Vulcanized rubber . 18
4.6 Reaction to fire. 19
4.6.1 General. 19
4.6.2 Classification without the need for testing . 19
4.6.3 Classification according to the test results . 19
4.7 Nominal capacity . 20
5.1 Load bearing capacity . 20
5.1.1 Crushing test . 20
5.1.2 Vertical load test . 23
5.1.3 Vacuum test . 24
5.1.4 Pit test . 25
5.2 Hydraulic efficiency . 27
5.2.1 General. 27
5.2.2 Test apparatus . 28
5.2.3 Test parameters . 29
5.2.4 Test preparation . 29
5.2.5 Test procedure . 30
5.2.6 Test results . 31
5.3 Watertightness . 31
5.3.1 Water test . 31
5.3.2 Vacuum test . 31
5.4 Durability . 32
5.4.1 General . 32
5.4.2 Concrete . 32
5.4.3 Steel . 32
5.4.4 Unplasticized polyvinyl chloride (PVC-U) . 32
5.4.5 Polyethylene (PE) . 32
5.4.6 Glass reinforced plastic (GRP) . 34
5.4.7 Polypropylene (PP) . 35
5.4.8 Polydicyclopentadiene (PDCPD) . 36
5.4.9 Vulcanized rubber . 36
5.5 Reaction to fire . 36
5.6 Nominal capacity . 36
6.1 General . 37
6.2 Type testing . 37
6.2.1 General . 37
6.2.2 Test samples, testing and compliance criteria . 38
6.2.3 Test reports . 44
6.2.4 Shared other party results . 44
6.2.5 Cascading determination of the product type results . 45
6.3 Factory production control . 46
6.3.1 General . 46
6.3.2 Requirements . 46
6.3.3 Product specific requirements . 49
6.3.4 Initial inspection of factory and of FPC . 49
6.3.5 Continuous surveillance of FPC . 50
6.3.6 Procedure for modifications . 50
6.3.7 One-off products, pre-production products (e.g. prototypes) and products produced
in very low quantity . 50
7.1 Marking . 51
7.2 Installation instructions . 51
7.3 Operating and maintenance instructions . 52
Annex A (informative) Information for execution . 53
Annex B (normative) Mechanical characteristics of test samples used for determination of
load bearing capacity with indirect calculations . 55
Annex C (normative) Alternative watertightness assessment methods for FPC (pneumatic
pressure test) . 56
Annex ZA (informative) Relationship of this European Standard with Regulation (EU)
No.305/2011 . 57
ZA.1 Scope and relevant characteristics . 57
ZA.2 System of Assessment and Verification of Constancy of Performance (AVCP) . 72
ZA.3 Assignment of AVCP tasks . 72
Bibliography . 75

European foreword
This document (prEN 12566-1:2018) has been prepared by Technical Committee CEN/TC 165 “Waste
water engineering”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12566-1:2016 and EN 12566-4:2016.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports basic requirements for construction works of
Regulation (EU) No. 305/2011.
For relationship with Regulation (EU) No. 305/2011, see informative Annex ZA, which is an integral
part of this document.
In comparison with the previous edition, the following technical modifications have been made:
• changes in AVCP clause and Annex ZA in accordance with the Construction Product Regulation
(CPR), changes in accordance with the CEN Rules and merging with EN 12566-4:2016.
The series of standards EN 12566 “Small wastewater treatment systems for up to 50 PT” contains the
following parts (see Figure 1):
• Part 1: Packaged and/or site assembled septic tanks (this document);
• Part 3: Packaged and/or site assembled domestic wastewater treatment plants;
• Part 6: Prefabricated treatment unit used for septic tank effluent;
• Part 7: Prefabricated tertiary treatment unit
For filtration systems, CEN/TC 165 decided to publish the following CEN Technical reports, which are
considered as Code of practices and do not specify treatment requirements:
• Part 2: Soil infiltration systems
• Part 5: Pre-treated Effluent Filtration systems
Key
A domestic wastewater 1 packaged and/or site assembled septic tank
B septic tank effluent 2 soil infiltration system
C treated infiltrated effluent 3 packaged and/or site assembled domestic wastewater treatment plant
D treated wastewater 5 pre-treated effluent filtration system
E tertiary treated wastewater 6 prefabricated treatment unit used for septic tank effluent
7 prefabricated tertiary treatment unit
Figure 1 — Scheme related to the arrangement of the parts of EN 12566
National regulations can specify different arrangements between the products described in the
standard series EN 12566.
1 Scope
This document specifies characteristics and related requirements, assessment methods, the marking
and assessment and verification of constancy of performance (AVCP) procedures for packaged and/or
site assembled septic tank used for populations up to 50 inhabitants.
Packaged and/or site assembled septic tanks in accordance with this document are:
• used for the primary treatment of domestic wastewater including that of guest houses and
businesses;
• made of concrete, steel, Unplasticized Polyvinylchloride (PVC-U), Polyethylene (PE), Polypropylene
(PP), Glass Reinforced Polyester (GRP-UP) and/or Polydicyclopentadiene (PDCPD);
• with or without elastomeric seals for joints made of vulcanized rubber;
• used buried in the ground;
• with or without extension shaft;
• with a nominally capacity of at least 2 m ;
• made of prefabricated components that are factory or site-assembled by one manufacturer and
which are tested as a whole.
This document does not cover packaged and/or site assembled septic tank:
• where vehicle loads apply to it;
• receiving grey water only.
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 206, Concrete — Specification, performance, production and conformity
EN 580:2003, Plastics piping systems — Unplasticized poly(vinyl chloride) (PVC-U) pipes — Test method
for the resistance to dichloromethane at a specified temperature (DCMT)
EN 727, Plastics piping and ducting systems — Thermoplastics pipes and fittings — Determination of
Vicat softening temperature (VST)
EN 976-1:1997, Underground tanks of glass-reinforced plastics (GRP) - Horizontal cylindrical tanks for
the non-pressure storage of liquid petroleum based fuels - Part 1: Requirements and test methods for single
wall tanks
EN 978:1997, Underground tanks of glass-reinforced plastics (GRP) - Determination of factor alpha and
factor beta
EN 1905, Plastics piping systems - Unplasticized poly(vinyl chloride) (PVC-U) pipes, fittings and material -
Method for assessment of the PVC content based on total chlorine content
EN 1992-1-1, Eurocode 2: Design of concrete structures - Part 1-1: General rules and rules for buildings
EN 1993-1-1, Eurocode 3: Design of steel structures - Part 1-1: General rules and rules for buildings
EN 10088-1, Stainless steels - Part 1: List of stainless steels
EN 13369, Common rules for precast concrete products
EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification
using data from reaction to fire tests
EN 16323:2014, Glossary of wastewater engineering terms
EN ISO 178, Plastics - Determination of flexural properties (ISO 178)
EN ISO 179 (all parts), Plastics — Determination of Charpy impact properties (ISO 179, all parts)
EN ISO 527-2:2012, Plastics - Determination of tensile properties - Part 2: Test conditions for moulding
and extrusion plastics (ISO 527-2:2012)
EN ISO 899-2, Plastics - Determination of creep behaviour - Part 2: Flexural creep by three-point loading
(ISO 899-2)
EN ISO 1133-1:2011, Plastics - Determination of the melt mass-flow rate (MFR) and melt volume-flow rate
(MVR) of thermoplastics - Part 1: Standard method (ISO 1133-1:2011)
EN ISO 1183 (all parts), Plastics — Methods for determining the density and relative density of non-
cellular plastics (ISO 1183, all parts)
EN ISO 2505:2005, Thermoplastics pipes - Longitudinal reversion - Test method and parameters (ISO
2505:2005)
EN ISO 2555, Plastics - Resins in the liquid state or as emulsions or dispersions - Determination of
apparent viscosity using a single cylinder type rotational viscometer method (ISO 2555)
EN ISO 9967, Thermoplastics pipes - Determination of creep ratio (ISO 9967)
EN ISO 9969, Thermoplastics pipes - Determination of ring stiffness (ISO 9969)
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)
EN ISO 14125:1998, Fibre-reinforced plastic composites - Determination of flexural properties (ISO
14125:1998)
ISO 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
ISO 48, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10 IRHD
and 100 IRHD)
3 Terms and definitions
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 16323:2014 and the following
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
extension shaft
component(s) which is part of the packaged and/or site assembled septic tank and allow access from or
slightly above the ground surface
3.1.2
nominal capacity
numerical designation of the volume of a packaged and/or site assembled septic tank, expressed as an
integer in cubic metres
3.1.3
product family
group of products in which, for evaluation, the selected property(s) is/are similar for all products
within the group considering at least similar shape, equipment, materials and conditions of end use and
ensures the minimum hydraulic efficiency and minimum structural behaviour for all the products in the
range
3.2 Symbols and abbreviated terms
AVCP Assessment and Verification of Constancy of Performance
CPR Construction Products Regulation No 305/2011
CWFT Classified Without Further Testing
DoP Declaration of Performance
FPC Factory Production Control
GRP Glass reinforced plastic
HDPE High Density Polyethylene
MFR Melt mass-Flow Rate
PDCPD Polydicyclopentadiene
PE Polyethylene
PP Polypropylene
PT Population total
PVC Polyvinyl Chloride
PVC-U Unplasticized Polyvinyl Chloride
4 Product characteristics
4.1 Design
4.1.1 General
The packaged and/or site assembled septic tank shall be structurally stable, durable, watertight and
corrosion resistant.
4.1.2 Inlets, outlets and connections
The minimum internal diameter of inlet and outlet pipes for gravity flow shall be as specified below:
• 100 mm for nominal capacity ≤ 6 m ;
• 150 mm for nominal capacity > 6 m .
The hydraulic design of the packaged and/or site assembled septic tank shall ensure that no back-flows,
blockage or surcharging occur during normal operation.
Inlet and outlet pipes shall be compatible with pipe systems in accordance with European Standards.
For design of outlet devices, see some examples in Annex A (informative).
4.1.3 Ventilation
Packaged and/or site assembled septic tank and the inlet pipework shall be ventilated to prevent the
accumulation of fermentation gases.
4.1.4 Access
The packaged and/or site assembled septic tank shall be designed to provide access to the inlet and
outlet areas; for routine maintenance, sampling, removal of sludge, cleaning and/or maintenance.
Access covers shall be fit for purpose.
The access opening shall be a minimum of 400 mm (i.e. width for rectangular section or diameter for
circular section). Where the access is for a person, the minimum dimension of the opening shall be
600 mm.
The packaged and/or site assembled septic tank shall be designed to restrict unauthorized access by
one of the following means:
a) mass of the individual covers;
b) securing feature; or
c) locking accessory.
Where a locking accessory or securing feature is used, it shall be designed so that the cover cannot be
easily opened with objects readily accessible by children.
4.1.5 Extension shaft
Extension shaft may be part of the packaged and/or site assembled septic tank and shall be fit for
purpose.
NOTE It can be an extension piece of the packaged and/or site assembled septic tank, which is fitted only
over certain points for example to allow maintenance or observation.
The extension shaft shall be constructed to avoid any surface water entering the packaged and/or site
assembled septic tank. This can be achieved by overlapping the access or fixed to the product or using a
gasket.
The extension shaft shall be constructed to ensure accessibility, access for maintenance work and the
opening/closing of the cover.
4.1.6 Sizing Basis
Depending on the end use of the packaged and/or site assembled septic tank, one or more of the
following design criteria shall be taken into consideration:
a) population load;
b) minimum volume criteria including sludge storage capacity;
c) additional design criteria for domestic wastewater flows from sources such as hotels, restaurants
or commercial premises.
NOTE Rules and units (per inhabitant, BOD, SS…) to be used for the determination of the population load are
given by national regulations.
4.1.7 Overall dimensions
The overall dimensions of the packaged and/or site assembled septic tank (i.e. height, width, length,
diameters, etc.) shall be measured and recorded.
The measurements shall be within ± 0,5 % of the design dimensions.
4.2 Load bearing capacity
4.2.1 General
4.2.1.1 Characteristics
Performance of the load bearing capacity of the packaged and/or site assembled septic tank (i.e. of the
tank of it) with or without extension shaft, shall be established either by testing or by calculations for
one of the following characteristics, as:
a) pit test resistance, as specified in 4.2.3.5, or
NOTE Considered as the referenced one.
Alternatively, this may be as:
b) crushing test resistance, as specified in 4.2.3.2,
c) vertical load test resistance, as specified in 4.2.3.3,
d) vacuum test resistance, as specified in 4.2.3.4,
e) load bearing capacity determined by calculation, as specified in 4.2.2.
4.2.1.2 Performance expression
The performance of load bearing capacity for any of the characteristics referred in 4.2.1.1 shall be
expressed as:
• value of the maximum allowed height of backfill expressed in meters (see H of Figure 6);
b
• possibility to install the packaged and/or site assembled septic tank either in wet or dry site, i.e.
expressed as indication either WET together with a value of the maximum height of the water table
measured from the base of the packaged and/or site assembled septic tank or DRY.
4.2.1.3 Tank selection
Performance of the load bearing capacity of packaged and/or site assembled septic tank shall be
established for the tank which represent the lowest performance within the product family.
NOTE For load bearing capacity, usually the biggest packaged and/or site assembled septic tank is generally
considered with the lowest performance.
4.2.2 Load bearing capacity determined by calculation
NOTE See 4.2.1.1, e).
4.2.2.1 General
For determination of performance of load bearing capacity of the packaged and/or site assembled
septic tank, calculation method shall apply, either indirectly (see 4.2.2.2) or directly (4.2.2.3), based on
an empty packaged and/or site assembled septic tank buried underground with the loads defined in
4.2.2.4.
The performance shall be expressed as defined in 4.2.1.2.
4.2.2.2 Indirect method
This indirect calculation method shall be used when:
• geometrical data of the packaged and/or site assembled septic tank (e.g. wall thickness, distance of
ribs, shape) are provided;
• properties of the materials and components of the packaged and/or site assembled septic tank are
in accordance with provisions of 4.5.2 to 4.5.9, as relevant for the respective material;
• mechanical characteristics of test samples used for calculation are in accordance with Annex B.
NOTE For materials not covered in Annex B (i.e. PDPCD), this calculation method is not applicable.
4.2.2.3 Direct method
The direct calculation method shall apply, when the packaged and/or site assembled septic tank is
made of
• reinforced concrete, based on EN 1992-1-1 (Eurocode 2) or
• steel, based on EN 1993-1-1 (Eurocode 3) shall apply.
NOTE For the other materials, this calculation method is not applicable.
4.2.2.4 Loads applied in calculation
4.2.2.4.1 Backfill loads
Calculation of backfill loads shall take account of the effect of ground conditions, backfill materials and
tank shape factors. A vertical and a horizontal component shall be calculated as follows:
• vertical component:
2 3
H × 18 (expressed in kN/m ), where 18 (kN/m ) is the specific weight of the soil and H (m) is the
height of backfill.
• horizontal component:
2 3
K × D × 18 (expressed in kN/m ), where 18 (kN/m ) is the specific weight of the soil, D (m) is the
distance from the ground level to the point where the load applies and K is the coefficient
depending on the backfill material.
The following K coefficient can be used:
• sand, K = 0,33;
• gravel, K = 0,27,
• for other backfill materials, K = 0,5.
4.2.2.4.2 Hydrostatic loads
A vertical and a horizontal component shall be calculated as follows:
• vertical component:
2 3
H × 10 (expressed in kN/m ), where 10 (kN/m ) is the action resulting from the specific weight of
w
water and H (m) is the declared water table level from the base of the packaged and/or site
w
assembled septic tank;
• horizontal component:
D × 10 (expressed in kN/m ) where D (m) is the distance from the ground level to the point where
the load applies.
On sites, where highest level of the groundwater table is above the bottom of the packaged and/or site
assembled septic tank, the stability conditions in relation to the water pressure shall be indicated in the
installation’s instructions.
4.2.2.4.3 Pedestrian loads
For pedestrian loads a value of 2,5 kN/m shall be considered in calculation only when the height of the
backfill (H) is less than or equal to 1 m.
When the height of backfill (H) is over 1 m, the pedestrian loads do not need to be considered for
calculation, as it is assumed to be negligible against other loads.
4.2.3 Load bearing capacity determined by testing
NOTE See 4.2.1.1, a) to d).
4.2.3.1 General
Performance of the load bearing capacity of a packaged and/or site assembled septic tank, determined
by testing, shall be using one of the methods referred in Table 1.
Table 1 — Test methods for the determination of the load bearing capacity
Installation Concrete GRP PE, PP and Steel PVC-U
condition PDCPD
a
See 4.2.3.5
a a
See 4.2.3.5 See 4.2.3.5
Dry or
a a
or or See 4.2.3.5 See 4.2.3.5
See 4.2.3.3
See 4.2.3.2 See 4.2.3.4
a
Wet See 4.2.3.5
a
Considered here as the referenced method (in bold text), including with those calculated methods, specified
in 4.2.2.2 and 4.2.2.3.
4.2.3.2 Crushing test resistance
Depending of the shape of the packaged and/or site assembled septic tank made of concrete, as
indicated in Table 2, the performance of the crushing test resistance of such tank shall be determined
using one of the following crushing tests methods:
a) type A test (vertical load), as specified for testing in 5.1.1.2 and subsequent calculation in 5.1.1.1;
b) type B test (horizontal load), as specified for testing in 5.1.1.3 and subsequent calculation in 5.1.1.1;
c) type C test (vertical load), as specified for testing in 5.1.1.4 and subsequent calculation in 5.1.1.1.
The performance of the crushing test resistance shall be expressed as defined in 4.2.1.2.
Table 2 — Crushing test methods
Rectangular or trapezoidal shape Vertical cylinder shape Horizontal cylinder shape

NOTE Letters A, B and C correspond to the relevant crushing test method.
4.2.3.3 Vertical load test resistance
The performance of the vertical load test resistance of a packaged and/or site assembled septic tank
shall be determined in accordance with test method, specified for the testing in 5.1.2 and for the
subsequent calculation in 5.1.1.1.
The performance of the vertical load test resistance shall be expressed as defined in 4.2.1.2.
4.2.3.4 Vacuum test resistance
The performance of the vacuum test resistance of packaged and/or site assembled septic tank shall be
determined in accordance with the test method, specified for the testing in 5.1.3.1 and for the
subsequent calculation in 5.1.3.2.
The performance of the vertical load test resistance shall be expressed as defined in 4.2.1.2.
4.2.3.5 Pit test resistance
The performance of the pit test resistance of a packaged and/or site assembled septic tank shall be
determined in accordance with test methods specified in 5.1.4.
After the test the packaged and/or site assembled septic tank, made of the respective materials, shall
meet the following requirements:
• For the tank, made of concrete or GRP, with characteristics:
a) Variation of volume: no variation, and
b) Loss of watertightness: no loss.
• For other materials:
a) Variation of volume: variation lower than 7,5 %, and
b) Loss of watertightness: no loss.
The performance of the pit test resistance shall be expressed as defined in 4.2.1.2.
4.3 Hydraulic efficiency
The performance of hydraulic efficiency of the packaged and/or site assembled septic tank shall be
determined in accordance with 5.2.2 to 5.2.5 and expressed as a value of mass of beads (in g), as
specified in 5.2.6.
The performance of the hydraulic efficiency of packaged and/or site assembled septic tank shall be
established for the tank which represent the lowest performance within the product family.
NOTE For hydraulic efficiency, usually the smallest packaged and/or site assembled septic tank is generally
considered with the lowest performance.
4.4 Watertightness
4.4.1 General
4.4.1.1 Characteristics
The performance of watertightness of the packaged and/or site assembled septic tank, with or without
extension shaft, shall be dealt with characteristics and determined by testing using one of the methods,
all as referred in in Table 3, depending on the material, the tank is made of.
Table 3 — Test methods for the determination of the watertightness
Characteristics Test Concrete GRP PE, PP and Steel PVC-U
methods PDCPD
a a a a a
Water loss Water test See 4.4.2 See 4.4.2 See 4.4.2 See 4.4.2 See 4.4.2
Pressure variation Vacuum test – See 4.4.3 See 4.4.3 See 4.4.3 –
a
Considered here as the referenced characteristic or test method (in bold text).
4.4.1.2 Performance expression
The performance of watertightness of the packaged and/or site assembled septic tank, when any of the
two characteristics, referred in Table 3 applies, shall be expressed as “compliant”, if the respective
requirement(s) in either 4.4.2 or 4.4.3 are met.
4.4.2 Water loss
Water loss shall be determined by water test in accordance with 5.3.1.
After the test, the result of water loss shall be evaluated for packaged and/or site assembled septic tank
made of:
• Concrete:
a) water loss shall be < 0,1 l/m of the internal wet surface of the external walls.
• Other materials:
b) no water loss (leakage) shall occur.
4.4.3 Pressure variation
Pressure variation shall be determined by vacuum test in accordance with 5.3.2.
Within the test period, the value of pressure variation shall not be higher than 10 %.
4.5 Durability
4.5.1 General
4.5.1.1 Materials
Packaged and/or site assembled septic tank, including all internal components, shall be manufactured
from materials, in accordance with 4.5.2 to 4.5.9, that make them suitable and durable for use in a
wastewater environment.
4.5.1.2 Performance expression
Where the material of the packaged and/or site assembled septic tank meets:
a) the requirement listed in 4.5.2 and 4.5.3 as appropriate, the performance of the respective
durability aspect characteristics, also specified therein, shall be expressed as “compliant”, or
b) the requirement listed in 4.5.4 to 4.5.9, as appropriate, the performance of all the respective
durability aspect characteristics, also specified therein, shall be jointly expressed as “compliant”.
4.5.2 Concrete
The performance of the durability aspect characteristics of a packaged and/or site assembled septic
tank, i.e. concrete compressive strength, shall be tested and classified in accordance with 5.4.2 and the
class obtained shall be greater or equal to class C 35/45.
4.5.3 Steel
The performance of the durability aspect characteristics of a packaged and/or site assembled septic
tank, i.e. steel corrosion resistance, shall be tested and classified in accordance with 5.4.3 and the class
obtained shall meet at least class III.
4.5.4 Unplasticized polyvinyl chloride (PVC-U)
The performance of the durability aspect characteristics of a packaged and/or site assembled septic
tank, as they are listed in Table 4, shall be tested in accordance with 5.4.4 and the results obtained shall
meet respective requirements in Table 4.
Table 4 — Unplasticized polyvinyl chloride (PVC-U) requirements
Durability aspect characteristics Requirements
PVC content (% of mass) ≥ 80
K-value ≥ 57 and ≤ 70
Vicat Softening Temperature (°C) ≥ 79
Density (kg/m ) ≥ 1 390 and ≤ 1 500
Resistance to dichloromethane at specified temperature ≤ 50 % of the chamfered wall surface
(DCMT)
Longitudinal reversion (%) ≤ 4,0
4.5.5 Polyethylene (PE)
4.5.5.1 PE rotomoulded
The performance of the durability aspect characteristics of a packaged and/or site assembled septic
tank, as they are listed in Table 5, shall be tested in accordance with 5.4.5.1 and the results obtained
shall meet respective requirements in Table 5.
Table 5 — Rotationally moulded polyethylene (PE) requirements
Durability aspect characteristics Requirements
Melt mass-flow rate (MFR) (g/10 min) ≥ 1 and ≤ 7
Density (kg/m ) ≥ 930
Tensile stress at yield (MPa) ≥ 14
Tensile strain at yield (%) ≤ 25
Tensile strain at break (%) ≥ 80
4.5.5.2 PE blow-moulded
The performance of the durability aspect characteristics of a packaged and/or site assembled septic
tank, as they are listed in Table 6, shall be tested in accordance with 5.4.5.2 and the results obtained
shall meet respective requirements in Table 6.
Table 6 — Blow moulded polyethylene (PE) requirements
Durability aspect characteristics Requirements
Melt mass-flow rate (MFR) (g/10 min) ≥ 2 and ≤ 12
Density (kg/m ) ≥ 940
Tensile stress at yield (MPa) ≥ 19
Tensile strain at yield (%) ≤ 25
Tensile strain at break (%) ≥ 200
4.5.5.3 PE Extruded
The performance of the durability aspect characteristics of a packaged and/or site assembled septic
tank, as they are listed in Table 7, shall be tested in accordance with 5.4.5.3 and the results obtained
shall meet respective requirements in Table 7.
Table 7 — Extruded polyethylene (PE) requirements
Durability aspect characteristics Requirements
Melt mass-flow rate (MFR) (g/10 min) ≥ 0,15 and ≤ 1,00
Density (kg/m ) ≥ 930
Tensile stress at yield (MPa) ≥ 21
Tensile strain at yield (%) ≤ 25
Tensile strain at break (%) ≥ 200
4.5.6 Glass reinforced plastic (GRP)
The performanc
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