May, 2nd 2016
1. NEW tool available. First version of calculation tool to double check your range.
2. Durability of small waste water treatment plants
March, 24th 2016
Important revision on scaling of the surface of primary.
For details check attachment:
February 19th 2016
Information on durability of materials
Important: The certification of the durability of materials by the Notified Body for part 3 products is separate from compliance with the SR66 and is required by the EN 12555-3 standard and so for the certification!
A list of Notified Bodies can be found here:
If you decide to test the durability with PIA GmbH please prepare the specimens as explained below and add technical datasheets (grp, polyethylene, polypropylene) respectively the recipe (concrete).
Width ≥ 25 mm
h = Thickness
l = 20 * h
Number: At least 20
Cut face must be coated with resin.
Size min. 300 mm (l) * 250 mm (b) * h mm
The specimens must be prepared according to EN 12390-1 and EN 12390-2.
To determine the compressive strength 3 specimens are needed.
They can be
cylinders: diameter: 150 ± 1.5 mm, height: 300 ± 3.0 mm or
cubes: edge length 100 ± 1.0 mm or edge length: 150 ± 1.5 mm.
After producing, the specimens must be stored under water for 7 days
(water temperature water 20°C). Please wrap the specimens afterwards in foil and send them to PIA.
January 2016, Important announcement
The National Standards Authority of Ireland (NSAI) have recently developed and published a Standard Recommendation (SR66) providing guidance on small wastewater treatment products. It outlines the existing National Annex requirements but also includes requirements relating to the number of de-sludgings carried out during the treatment efficiency test. For SWWTS with shared ITT, SR 66 contains comparability requirements for the tank which must be complied with. Where a family of products exist, claiming the same performance as the tested model, scaling rules apply.
PIA understands that the Technical Guidance Document H (TGD H) - Drainage and Waste Water Disposal is being amended to reference S.R.66 and that the amended TGD H will become effective in early 2016 (Beginning of April). This will mean that all Wastewater Treatment products will have to be in compliance with SR66 to be eligible for use in Ireland. In response to this and to ensure that appropriate certification is available to show compliance with SR66, PIA is developing a new list of products meeting the requirements of SR66.
If you wish to have your product certified to SR66 and displayed on our website please contact Dipl.-Ing. Daniel Verschitz
SR66 available here:
Small Wastewater Treatment Systems
Tested to the EN 12566 Standard Part 1 or Part 3:
The following is a list of Manufacturers whose products have been initial type tested by a Notified Body in accordance with the relevant parts of EN 12566 Small wastewater treatment systems for up to 50 PT.
Wastewater treatment plants tested to EN 12566 Part 3 - Packaged and/or site assembled domestic wastewater treatment plants, are listed with their certification displayed in a manner suitable for comparison to the National Annex for Ireland. The declared results as shown on the certificates are valid for a test influent of 300 mg/l BOD5 or greater. They should be checked against the values specified in the Irish National Annex Table NA1 and Table NA2 to determine the products suitability for use in Ireland.
NOTE 1: The certificates as shown demonstrate the performance of the product when installed, serviced and maintained in accordance with good practice and the manufacturers recommendations. The certificates only give brief information. Technical details concerning the installation, maintenance and operation can not be derived from the information on the certificates. They necessarily have to be taken from the manufacturer's instructions!
NOTE 2: Where small wastewater treatment plants are produced by two manufacturers, ie one company produces the tank and the other manufacturer produces the technical kit, the standard EN 12566-3 requires that one producer (marketer) is responsible for the compliance of the product.
Where the conformity of the product has been verified by two manufacturers the manufacturer, which is named first, takes responsibility for the compliance with the requirements for all aspects of the wastewater treatment plant.
NOTE 3: The listed documents replace neither the declaration of conformity nor the CE marking.
List of certificates in accordance to Part 3 (in alphabetical order):
Septic Tanks tested to EN 12566 Part 1 - Pre-fabricated septic tanks, are listed with their certification displayed in a manner suitable for comparison to the National Annex for Ireland.
They should be checked against the values specified in the Irish National Annex Table NA1 to determine the products suitability for use in Ireland.
List of certificates in accordance to Part 1 (in alphabetical order):
NOTE 4: The above has been setup in consultation with the Irish Department of Environment, Community and Local Government.
Further information on Small Wastewater Treatment systems for Ireland can be found on the Departments website www.environ.ie/en/DevelopmentHousing/BuildingStandards/
and from the Environmental Protection Agency’s website: http://www.epa.ie/downloads/advice/water/wastewater/code%20of%20practice%20for%20single%20houses/.
NOTE 5: Explanation of the different characteristics and tests for septic tanks described on the certificate
The structural behaviour is performed on the largest size of the range.
The hydraulic efficiency is performed on the smallest size of the range.
The watertightness and nominal capacity is performed on every size of the range.
The nominal capacity is only the numerical designation of the volume of a septic tank, expressed as an integer in cubic metres as required by the standard.
Next to the nominal capacity, the full, usable volume is declared in brackets. This value is needed to fulfil the requirements of the following formula defined in the Environmental Protection Agencies Code of Practice- Wastewater treatment and disposal systems serving single houses and required by the Irish Building Regulations:
C = 150 x P + 2000 where C is the capacity (l) of the tank and P is the design population, with a minimum of four persons.
All different tanks of a range are mentioned on the certificate as a separate nominal capacity.
Example 1: The septic tank range of a manufacturer consists of three different tanks with usable volumes of 2,800 l, 3,800 l and 4,600 l.
So the nominal capacity is 2 m³, 3 m³ and 4 m³. All three of them were tested according EN 12566-1.
The hydraulic efficiency test was done on the 2 m² tank, the structural test was performed on the 4 m³ tank and the watertightness test was done on all of them.
Example 2: The range of a manufacturer consists only of one tank with a usable volume of 4,600 l, and all relevant tests were performed on this tank. So the nominal capacity is 4 m³ with a usable volume of 4,600 l. It is not possible to downscale this plant, e.g. to use it as a 2-m² tank because the hydraulic efficiency was done on the 4-m³ tank.