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Characteristics of deposits on the inner surface of the pipes
| HDPE | PEX | PVC | |
|---|---|---|---|
| Percentage of surface covered by mineral deposits (%) | 47.52 | 21.64 | 0 |
| Size of mineral deposits (µm2) | |||
| Mean value | 3.82 | 0.08 | 0 |
| Median | 0.19 | 0.03 | 0 |
| Standard deviation | 26.40 | 0.24 | 0 |
| Total number of bacteria (cells cm−2) | |||
| Mean value | 1.59 × 106 | 1.24 × 107 | 1.59 × 105 |
| Standard deviation | 9.30 × 105 | 7.94 × 106 | 1.59 × 105 |
