| Gap ID | Gap identified | Researchers and the research gaps identified | |||||||||
| Bokor | Butler | Environment agency | Gormley | Gauley | Lillywhite | Littlewood | PERC | Swaffield | Wakelin | ||
| 1.0 | Effect of junctions and bends | x |
|
|
|
| x | x |
|
| x |
| 2.0 | Quality/installation errors | x |
| x |
|
|
| x |
|
| x |
| 3.0 | Simulated faeces | x |
|
|
| x |
|
|
|
| x |
| 4.0 | Steep/variable gradients |
| x |
|
|
|
| x | x |
|
|
| 5.0 | Impact of wipes on sewers |
|
|
|
|
|
|
| x | x |
|
| 6.0 | White goods |
|
| x |
| x |
|
|
|
|
|
| 7.0 | Single occupancy dwellings |
|
| x |
| x |
|
|
|
|
|
| 8.0 | Baths versus showers |
|
| x |
|
|
|
|
|
|
|
| 9.0 | The use of non-circular pipes |
|
|
|
|
|
|
|
| x |
|
| 10.0 | Degradation of human faeces |
| x |
|
|
|
|
|
|
|
|
| 11.0 | Surfactant dosing |
|
|
| x |
|
|
|
|
|
|