Understanding EN 13828 Standards for Brass Fittings

Technical standards are not the most glamorous subject in the world. I'm fully aware of that. But they are the framework that separates a fitting you can trust in a building from one that might fail. And EN 13828 — the European standard for manually operated copper alloy and stainless steel ball valves for building services — is one of the standards that buyers importing into Europe need to understand in practical terms.

Let me give you the most useful parts of this standard explained clearly — what it tests, what it requires, and what compliance actually looks like in practice.

What EN 13828 Covers

EN 13828 applies to manually operated ball valves (and valves with detachable actuator capability) made from copper alloys or stainless steel, for use in building services applications. The full title is: "Building valves — Manually operated copper alloy and stainless steel ball valves for drinking water supply in buildings — Tests and requirements."

The scope includes:

• Valves with nominal pressures up to PN20 (with PN40 as a higher-pressure variant)
• Operating temperatures from –20°C to +90°C (drinking water range)
• Sizes DN8 to DN50 (approximately ¼" to 2")
• End connections: threaded (BSPP or BSPT), compression, press-fit

The Key Tests in EN 13828

Hydrostatic Strength Test

The valve body is pressurised to 1.5 times the rated PN at ambient temperature and held for 60 seconds. The requirement: zero leakage, zero permanent deformation. This is the most fundamental structural test — confirming the body can withstand overpressure without failure.

Seat Leakage Test

With the valve in the closed position, water pressure is applied at the rated PN and held for 15 seconds. Maximum allowable leakage past the closed ball: for PN20, zero visible leakage is required (Class A leakage). This tests the ball-to-seat sealing performance that is the primary function of the valve.

Operating Torque Test

The valve must be operable (openable and closeable) at a specified maximum torque throughout its design life of pressure cycles. EN 13828 specifies a mechanical endurance test of 10,000 operations at rated pressure, after which the valve must still meet its leakage class requirement. This is the test that separates a valve with durable PTFE seats from one whose seats deteriorate within the first few hundred cycles.

Dezincification Resistance

For copper alloy valves claiming dezincification resistance, EN 13828 requires testing to ISO 6509. The acceptance criterion: maximum dezincification depth of 200 μm after the test. Valves intended for UK and Australian markets (where hard water conditions require DZR compliance) must pass this test.

Effect on Water Quality (Organoleptic Test)

The valve must not impart taste, odour, or turbidity to drinking water beyond defined thresholds. This test — performed to EN 15664 or equivalent — is particularly important for WRAS compliance and potable water applications. The test involves circulating water through the valve under defined conditions and testing the effluent for taste, odour, turbidity, and specific extractable chemicals.

What an EN 13828 Compliant Valve Should Include

A valve claiming EN 13828 compliance should be accompanied by:

1. A Declaration of Performance (DoP) citing EN 13828 as the harmonised standard
2. Test reports from an accredited testing laboratory confirming the specific product has passed the relevant tests
3. Material certificates confirming the alloy specification (CW617N for standard, CW602N for DZR)
4. Marking on the valve body (or permanently attached label) showing: manufacturer identification, DN size, PN rating, and where applicable, the DZR symbol (>>)

When in doubt, ask for the test report reference and check whether the testing laboratory cited is accredited by a national accreditation body (UKAS in the UK, DAkkS in Germany, etc.).

EN 13828 vs. BS 5154 (the Old UK Standard)

BS 5154 was the predecessor British Standard for copper alloy globe and check valves. EN 13828 is the harmonised European replacement that came into force progressively through the 2000s. Products still marked "to BS 5154" may be compliant — but check the edition date. Very old products may have been tested to an older, less demanding version. For new procurement, specify EN 13828 compliance and ask for the supporting test documentation.

Understanding the standard gives you power as a buyer. When a supplier says "it's CE marked and meets European standards," you now know the right follow-up question: "Which specific European standard, to which revision, and do you have the test report?" The answer tells you everything about whether the compliance is genuine or aspirational.