| Description | View of open trench with short piece if main alongside a second main; legend "Shows the syphon on the 18in Kirkby main. This syphon is made up by using a 12ft length of 24in main the idea being to have a large capacity in order to reduce the number of occasions on which it has to be pumped. This syphon is No 5282/12"; Ref M182; dated February 1948 |