Fitting no. | Connection pipe length | Frequency of usage a | Mode of flushing | Â |
---|---|---|---|---|
 |  |  | Pre-flushing | Post-flushing b |
1 | 50Â cm | once weekly | none | none |
2 | 50Â cm | once monthly | none | none |
3 | 50 cm | 10× daily | none | none |
4 | 300 cm | 10× daily | none | none |
5 | 50 cm | 10× daily | none | 2 s |
6 | 50 cm | 10× daily | none | 10 s |
7 | none | 10× daily | none | none |
8 | 50Â cm | none | 30Â s | none |