Oil firing installations - Technical regulation for oil firing installation (TRÖ) - Testing
Edition 2004-11

Prefabricated concrete manholes, unreinforced, steel fibre and reinforced - Part 1: Requirements, test methods and marking for drains and sewers in addition to DIN EN 1917:2003-04
Edition 2020-04

Drainage systems on private ground - Part 30: Maintenance
Edition 2012-02

Separator systems for light liquids (e. g. oil and petrol) - Part 1: Principles of product design, performance and testing, marking and quality control; German version EN 858-1:2002 + A1:2004
Edition 2005-02

Wastewater treatment plants - Part 8: Sludge treatment and storage; German and English version prEN 12255-8:2022
Edition 2022-03

Drainage systems on private ground - Part 100: Specifications in relation to DIN EN 752 and DIN EN 12056
Edition 2016-12

Determination of the nominal daily load of domestic wastewater during the operation of small wastewater treatment plants according to EN 12566-3 and DIN 4261-1
Edition 2011-02

Requirements for lining with cured-in-place pipes for renovation of drains connected to premises
Edition 2012-05

Requirements for leak detection systems for substances related to agriculture that are generally hazardous to water
Edition 2019-12