Registration number (WIID)Project No.TitleStatus
7236LVS EN 12255-3:2016Wastewater treatment plants - Part 3: Preliminary treatmentStandarts spēkā
7283LVS CEN/TR 12566-2:2005Small wastewater treatment systems for up to 50 PT - Part 2: Soil infiltration systemsStandarts spēkā
7211LVS EN 12056-5:2001Gravity drainage systems inside buildings - Part 5: Installation and testing, instructions for operation, maintenance and useStandarts spēkā
7209LVS EN 12056-3:2001Gravity drainage systems inside buildings - Part 3: Roof drainage, layout and calculationStandarts spēkā
41267LVS EN 12566-7:2016Small wastewater treatment systems for up to 50 PT - Part 7: Prefabricated tertiary treatment unitsStandarts spēkā
31248LVS EN 1253-1:2015Gullies for buildings - Part 1: Trapped floor gullies with a depth water seal of at least 50 mmStandarts spēkā
41266LVS EN 12566-1:2016Small wastewater treatment systems for up to 50 PT - Part 1: Prefabricated septic tanksStandarts spēkā
66080LVS EN 12255-16:2021Wastewater treatment plants - Part 16: Physical (mechanical) filtrationStandarts spēkā
38561CEN/TR 16626:2014Vitrified clay pipe systems for drains and sewers - Guidance for voluntary third-party certification proceduresStandarts spēkā
66907EN 12255-9:2023Wastewater treatment plants - Part 9: Odour control and ventilationStandarts spēkā
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