DIN 3607-1 2023-05 PDF

Full title and description

DIN 3607-1:2023-05 — Limescale protection devices for use in drinking water installations — Part 1: Requirements for design, safety and testing. (German title: "Kalkschutzgeräte zum Einsatz in Trinkwasser-Installationen - Teil 1: Anforderungen an Ausführung, Sicherheit und Prüfung").

Abstract

This standard specifies requirements for permanently installed devices intended to reduce scale formation in drinking-water installations. It defines permitted functional principles (devices that act by formation of calcium carbonate crystal nuclei), design and safety requirements, test and performance criteria, and exclusions (it does not apply to devices that function solely or additionally by adding complexing agents such as polyphosphates or by reducing hardness through ion exchange or partial desalination). The document is intended to ensure hygienic, hydraulic and technical safety when limescale protection devices are used in potable water systems.

General information

• Status: Current / Active standard.
• Publication date: 1 May 2023 (edition 2023-05).
• Publisher: DIN (Deutsches Institut für Normung).
• ICS / categories: 13.060.20; 91.140.60 (drinking water / water supply systems).
• Edition / version: DIN 3607-1:2023-05 (Part 1).
• Number of pages: 37.

Scope

Applies to permanently connected limescale-protection devices installed inside drinking-water installations that reduce deposition of calcium carbonate by promoting crystallisation on seed nuclei. The standard sets requirements for construction, materials in contact with drinking water, safety (including hydraulic performance and pressure-drop limits), hygienic aspects and the procedures for type testing and verification. It explicitly excludes devices that rely solely or additionally on chemical inhibitors (e.g., polyphosphates), ion exchange, partial desalination or precipitation with filtration. The document is part of the DVGW rule set and builds on earlier DVGW documents such as W 510.

Key topics and requirements

• Definition and classification of "Kalkschutzgeräte" (limescale protection devices).
• Design and construction requirements for safe, hygienic operation in potable water systems.
• Materials and components in contact with drinking water — conformity and suitability.
• Hydraulic performance: permitted pressure drops, flow ranges and installation interfaces.
• Functional criteria and effectiveness testing for scale-reduction by crystallisation mechanisms.
• Type testing, inspection, marking and documentation requirements.
• Exclusions: devices based on chemical dosing (polyphosphates), ion exchange or desalination are not covered.
• Relationship to DVGW certification and existing DVGW work sheets (performance and conformity pathways).

Typical use and users

Used by manufacturers and product designers of limescale-protection devices, testing and certification bodies, plumbing and HVAC engineers, installers and maintenance personnel, water utilities and consultants who evaluate or specify potable-water treatment technologies for buildings and domestic installations. The standard is referenced in procurement, product development, conformity assessment and technical guidance for safe installation and operation.

Related standards

Related documents and references include the earlier DVGW work sheets (for example DVGW W 510) which the new DIN text supersedes/replaces for many purposes, relevant parts of DIN 1988 (water installations and guidance on water hardness), and the forthcoming or companion parts of DIN 3607 (for example Part 2) that cover additional aspects of limescale-protection evaluation and testing. The standard is intended to be incorporated into the DVGW body of rules.

Keywords

limescale protection; kalkschutzgeräte; drinking water; potable water installations; scale reduction; calcium carbonate crystallisation; hygienic safety; DVGW; type testing; materials in contact with drinking water; pressure drop; installation requirements.

FAQ

Q: What is this standard?

A: DIN 3607-1:2023-05 is a German standard specifying requirements for permanently installed limescale-protection devices used in drinking-water installations, covering design, safety and testing.

Q: What does it cover?

A: It covers devices that reduce scale formation by promoting calcium carbonate crystallisation on seed nuclei, and sets out construction, material, safety, hydraulic and test requirements; it excludes devices that act by adding inhibitors (e.g., polyphosphates) or by ion exchange/desalination.

Q: Who typically uses it?

A: Manufacturers, test laboratories and certification bodies, plumbers and installers, water utilities, engineers and specifiers involved with potable-water installations and scale-control solutions.

Q: Is it current or superseded?

A: It is an active/current DIN standard published in May 2023 (edition 2023-05). The document is positioned within the DVGW rules and is intended to replace or take the place of older DVGW guidance such as W 510 for many applications.

Q: Is it part of a series?

A: Yes — this is Part 1 of DIN 3607. Companion parts (for example Part 2) are referenced in the technical community for additional test and evaluation requirements. The DVGW and sector press identify DIN 3607-1 and related parts as the updated normative framework for limescale-protection devices.

Q: What are the key keywords?

A: Limescale protection; drinking water; Kalkschutzgeräte; calcium carbonate crystallisation; hygienic safety; DVGW; testing; materials in contact with drinking water; pressure drop; installation requirements.