自1994年以来，长500 mm、直径100 mm的管道段已经暴露在一个1.3 km长的一次性饮用水分配系统中。这些管段来自向水行业供应管道的制造商，由水泥内衬、沥青内衬、MDPE（中密度聚乙烯）、环氧树脂再内衬和外露铁组成。研究了长度和直径相同的玻璃切片作为惰性对照材料。1995年、1996年和1997年，每种管道材料的三个管段被清除，沉积物从管壁表面刮去。 然后对样品进行定量和定性分析，包括红外、元素分析和电子显微镜。使用标准平板计数法测量微生物参数。扫描电子显微镜用于目视和元素分析。结果将根据配电系统中使用的材料进行讨论。

Sections of pipe, 500 mm long and 100 mm in diameter, have been exposed in an experimental 1.3 km-long, one-pass drinking water distribution system since 1994. The pipe sections were obtained from manufacturers that supply pipes to the water industry and consisted of cement lined, bitumen lined, MDPE (medium density polyethylene), epoxy re-lined and exposed iron. Glass sections of the same length and diameter were studied as an inert control material. Three pipe sections of each pipe material were removed in 1995, 1996 and 1997 and the deposits scraped from the pipe wall surface. Quantitative and qualitative analyses were then carried out on the samples including infrared, elemental analysis and electron microscopy. Microbiological parameters were measured using standard plate counts. Scanning electron microscopy was used for visual and elemental analysis. Results are discussed in relation to materials used in distribution systems.