Piping systems and components in water installations - Fittings, valves and devices
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Testing of fittings
The general scope of fittings testing includes tests such as torque, mechanical strength, leak tightness, temperature cycling (shift between cold and hot water), pressure jump, pull-out resistance, internal pressure and corrosion. Fittings may be an integrated part of other components like valves and devices, which is why the scope of testing for these components also includes fittings.
Testing of valves and devices
The general scope of valve and device testing includes tests such as function, flow, pressure loss, torque and bending moment, mechanical strength, low and high pressure tightness, vacuum tightness, back pressure tightness, endurance test and corrosion test. For products such as toilet seats with a rinsing or drying function connected to electric power, the European low voltage directive 2014/35/EU applies.
In the context of preventing pollution by backflow in water installations, "family" and "type" refer to classifications of backflow prevention devices based on their design and functionality. These classifications are crucial for ensuring that water supply systems are protected from contamination due to backflow, which can occur through back pressure or backsiphonage. A more detailed description appears from EN 1717.
Test methods for fittings in buildings
DVGW W534: Pipe connectors and pipe connections in drinking water installations
NKB 12: Product rules for metal compression fittings for copper tubes for water supply installations
NKB 18: Product rules for metal compression fittings for plastic tubes of PB and PE-X for water supply installations
EN 1254: Copper and copper alloys – Plumbing fittings. The standard includes of the following parts:
Part 1: Capillary fittings for soldering or brazing to copper tubes
Part 2: Compression fittings for use with copper tubes
Part 3: Compression fittings for use with plastics and multilayer pipes
Part 4: Threaded fittings
Part 5: Capillary fittings with short ends for brazing to copper tubes
Part 6: Push-fit fittings for use with metallic tubes, plastics and multilayer pipes
Part 7: Press fitting for use with metallic tubes
Part 8: Press fitting for use with plastics and multilayer pipes
Part 20: Definitions, thread dimensions, test methods, reference data and supporting information
Approval and certification schemes for fittings
DVGW ZP8500, DVGW ZP7402 (EN 1254-4), DVGW ZP7412 (EN 1254-1), RISE CR074, Finnish decrees 1/19, 3/19, 5/19 and 2/20.
Test methods for valves and devices
EN 1074: Valves for water supply – Fitness for purpose requirements and appropriate verification tests. The standard includes the following parts:
Part 1: General requirements
Part 2: Isolation valves
Part 3: Check valves
Part 5: Control valves
Part 6: Hydrants
EN 1171: Industrial valves – Cast iron gate valves
EN 1213: Building valves – Copper alloy stop-valves for potable water supply in buildings
EN 1488: Building valves – Expansion groups – Test and requirements
EN 1490: Building valves - Combined temperature and pressure relief valves - Tests and requirements
EN 1491: Building valves – Expansion valves – Test and requirements
EN 1567: Building valves – Water pressure reducing valves and combination water pressure reducing valves – Requirements and tests
EN 1717: Protection against pollution of potable water in water installations and general requirements of devices to prevent pollution by backflow
EN 12729: Devices to prevent pollution by backflow of potable water – Controllable backflow preventer with reduced pressure zone Family B, type A
EN 13828: Building valves – Manually operated copper and stainless-steel ball valves for potable water supply in buildings – Test and requirements
NKB 13: Product rules for stop valves for water installations
EN 13077: Devices to prevent pollution by backflow of potable water – Air gap with non-circular overflow (unrestricted) – Family A, type B
EN 13433: Devices to prevent pollution by backflow of potable water - Mechanical disconnector, directly actuated – Family G, type A
EN 13434: Devices to prevent pollution by backflow of potable water - Mechanical disconnector, flow actuated – Family G, type B
EN 13959: Anti-pollution check valves – DN 6 to DN 250 inclusive family E, type A, B, C and D
NKB 9: Product rules for check valves for water installations
EN 14367: Non controllable backflow preventer with different pressure zones - Family C, type A
EN 14451: Devices to prevent pollution by backflow of potable water – In-line anti-vacuum valves DN 10 to DN 50 inclusive – Family D, type A
EN 14452: Devices to prevent pollution by backflow of potable water – Pipe interrupter with atmospheric vent and moving element DN 10 to DN 20 - Family D, type B
EN 14453: Devices to prevent pollution by backflow of potable water – Pipe interrupter with permanent atmospheric vent DN 10 to DN 20 - Family D, type C
EN 14454: Devices to prevent pollution by backflow of potable water – DN 15 to DN 32 inclusive – Family H, type A
EN 14455: Devices to prevent pollution by backflow of potable water – Pressurised air inlet valves DN 15 to DN 50 inclusive – Family L, type A and B
EN 14898: Water conditioning equipment inside buildings- Active media filters -Requirements for performance, safety and testing
DIN 3227: Valves for potable water supply in buildings – Angle service valves – Requirements and tests
DIN 3509: Valves for potable water supply in buildings – Draw-off taps (PN 10) – Requirements and tests
EN IEC 60335-2-84:2021/A12:2023: Household and similar electrical appliances - Safety - Part 2-84: Particular requirements for toilet appliances
Approval and certification schemes for valves and devices
VA PG 1717, VA PG 13828, VA PG 13959, RISE CR074, DVGW ZP 6328 (DVGW W570-1 and -2), DVGW ZP6115, Finnish decrees 6/19, 8/19