This paper examines the current practices for migration/leaching tests used to evaluate distribution system and plumbing
materials and highlights the need to use representative water qualities (e.g., chlorine vs. chloramines) during tests. The effect of
specific water qualities has become more critical in the U.S. as chloramines are increasingly used and problems such as
degrading rubber gasket or leaching metals (copper and lead) are first experienced by consumers/sentinels and then reported to
unsuspecting utilities. Also, because the standard procedures evaluate water on overall odor intensity, they do not necessarily
provide information on individual aesthetic qualities which are critical in determining the source of taste-and-odor problems. A
comparison of common migration tests - the Utility Quick Test, French Standard (AFNOR XP- P41-250-1), European Standard
(EN 1420-1), British Standard (BS 6920) and the Australian and New Zealand Standard (AS/NZ 4020), has been made and
available data for aesthetic testing of plumbing materials summarized. Case studies are presented, such as when phenol leached
from an acrylic reservoir lining reacted with chlorine in the distribution system to form medicinal-smelling brominated
compounds. Includes 23 references, tables.
| Edition : | Vol. - No. |
| File Size : | 1
file |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 10 |
| Published : | 11/15/2004 |
