SR 66 provides guidance on small wastewater treatment products tested to the European standard EN 12566 series for use in Ireland. It reiterates the performance requirements outlined in the original National Annexes as well as including requirements relating to the number of de-sludgings carried out during the treatment efficiency test. It also introduced comparability requirements for the tanks of small wastewater treatment products with shared ITT, which must be complied with. Where a family of products exist, claiming the same performance as the tested model, scaling rules were introduced.
All works started after January 1st involving wastewater treatment systems up to 50 P/E will have to comply with the requirements of S.R. 66:2015. This means that all Wastewater Treatment products have to be in compliance with S.R. 66:2015 to be eligible for use in Ireland.
TRICEL have SR 66 certification on our range of Tricel novo wastewater treatment plants, our range of Tricel Vento septic tanks and the Tricel puraflo range.
Please see links below to the certificates:
From January 1st 2017, all work undertaken in relation to domestic wastewater treatment plants (WWT) within Ireland will have to comply with the requirements of SR 66. The introduction of SR66 Certification provides guidance to WWT plant producers, homeowners and general builders and highlights which plants are eligible for use within Ireland.
Technical Guidance Document Part H -Drainage and Waste Water Disposal of the Building Regulations 2010 was amended in July 2016 to call up the requirements S.R. 66:2015 – Standard Recommendation providing guidance to wastewater treatment products in compliance with the EN 12566 series of standards. This amendment has made the requirements set out in S.R. 66 compulsory as of the 1st of January 2017 when installing a Small wastewater treatment plant in Ireland.
The new certification outlines the minimum performance test result and requirements related to scaling and sludge capacity for plants tested to EN12566 series of standards to be suitable for use in the Republic of Ireland.
It is of the utmost importance to consult all relative legislation, Standard Recommendations and Technical Guidance documents when undertaking an installation project for all types of wastewater and sewage treatment.
The Standard Recommendation 66 (S.R. 66) was produced by a committee made up of technical experts and published in 2015. This included members of the National Standards Authority of Ireland Wastewater Engineering Standards Committee. Conversely, this new S.R. does not include requirements for the suitable tertiary treatment for WWT which is necessary for some domestic plant applications.
Technical Guidance Documents are published to accompany each individual element of Irish Building Regulations. Responsibility of compliance with such requirements rests primarily with designers, the owners of buildings and builders. This Standard Recommendation provides criteria for consideration when choosing a WWT plant for installation in an Irish domestic setting ( The reasoning behind this latest amendment is to provide structured guidelines for designers, manufacturers and plant installers. These requirements outlined are necessary when selecting a wastewater treatment system for installation; this includes any applied to usage of up to 50 PE.
These criteria align with the appropriate part of the IS EN 12566 series of standards and code of practice as published (2009) by the Environmental Protection Agency entitled ‘Wastewater Treatment and Disposal Systems Serving Single Houses PE<10’. The I.S. EN 12566 set out a series of laboratory based tests, required by all wastewater treatment plants to be CE marked. Such testing takes place at an EU nominated test centre and target areas such as treatment efficiency and plant structural integrity.
Tricel have gained certification to the new standard for their wastewater treatment tanks for use in the Irish market.
Contact us on:
For all wastewater treatment queries.