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prEN 18268 Public enquiry
Comment end date 2026-01-18
Chemicals used for treatment of water intended for human consumption - Antiscalants for membranes - Citric Acid

This document is applicable to citric acid used as an antiscalant for membranes in the treatment of water intended for human consumption. It describes the characteristics and specifies the requirements and the corresponding analytical methods for citric acid. It gives information on its use as an antiscalant for membranes in water treatment. It also provides guidance relating to safe handling and use (see Annex B).

prEN 18247-1 Public enquiry
Comment end date 2025-12-30
Performance testing of on-site non-potable water systems - Part 1: Greywater systems

This document specifies the testing conditions to assess the treatment performances of greywater systems. Excluded from the scope of this document are: - the testing of rainwater harvesting systems; - the testing of systems for direct use as mentioned in EN 16941–2 "On-site non-potable water systems - Part 2: Systems for the use of treated greywater"; - the testing of blackwater treatment systems; - the testing of wastewater treatment plant.

prEN 295-8 Public enquiry
Comment end date 2025-12-30
Vitrified clay pipe systems for drains and sewers - Part 8: Requirements for the use of vitrified clay components in the rehabilitation of drainage systems and conditions for the application of methods for rehabilitation in existing drainage systems

The scope of the new standard will cover the different types of repair and rehabilitation that can be undertaken on / or with clay pipes. This will include details on trenchless installation technologies where clay pipes can be used for repair or replacement. The standard will outline the technique used and relevant standards that products can be used from as well as performance and testing criteria for products after installation. The scope will also cover repair and rehabilitation of pipes laid using the open trench installation method. This will include replacement of socketed joints and replacement or repair of pipes, junctions and manholes. The scope will again cover the products that can be used, their performance criteria and testing methods after installation.

prEN 1490 Public enquiry
Comment end date 2025-12-23
Building valves - Combined temperature and pressure relief valves - Tests and requirements

This document specifies dimensions, materials and performance requirements, including test methods, for combined temperature and pressure relief valves, of nominal sizes from DN 15 to DN 40, having working pressures ) from 0,3 MPa (3 bar) to 1,0 MPa (10 bar). Combined temperature and pressure relief valves control and limit the temperature and pressure of the water contained in a hot water heater to the valves rating pressure and a temperature not exceeding 100 °C and will prevent water to steam formation when other temperature controls fail. Combined temperature and pressure relief valves are classified having a maximum opening temperature range from 90 °C to 95 °C for class A and 75 °C to 80 °C for class B. They are not intended to act as an expansion valve and do not control cold water flow. Alone it does not constitute the control functions for a water heater. A combined temperature and pressure relief valve is an independently mechanically operating device, therefore operating without an external energy source. NOTE The use of the device specified in this document does not override the need to use controls (e.g. thermostats and cut-outs) which act directly on the power sources of water heaters (for more information, see Annex B).

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