Table 3.
Leaching limits and leaching test requirements.
| Description | US | Canada | Australia | New Zealand | UK | |
|---|---|---|---|---|---|---|
| Test Sample | Materials or Finished Products | Only for Non-Metallic Products | ||||
| Test Method | in-the-Product (all Samples except Solder); Immersion (Solder) | |||||
| Sample Size | in-the Product | Smallest Inner Diameter | ||||
| Immersion (Minimum Surface Area to Volume Ratio) | 5000 mm2/L | 1000 mm2/L | ||||
| Sample Pre-Test | Cleaning | Rinsed with Contaminate-Free Water | Rinsed in Flowing Tap Water | |||
| Conditioning in Test Water | for Minimum 2 days | for 24 h | ||||
| Test Water | pH value | Minimum 6.5 (Pipings) and 5 (Valves and Fittings) | Minimum 6.5 | |||
| Temperature | 23 ± 2 °C | 20 ± 2 °C | ||||
| Exposure Time | 24 ± 1 h | 24 ± 2 h | ||||
| Container | in-the Product | Capped with Inert Materials | ||||
| Immersion Test | Materials Inert to the Test Water | Glass or Polyethylene Ware | ||||
| Single Product Allowable Leaching Limit | ≤0.5 µg/L | ≤10 µg/L (Duplicate Samples) | ||||