| Description | View of open trench with mains immediately outside Croxteth Valve House; legend "Croxteth Valve House At the top of the photograph the first portion shows the orifice plate followed two pipes later with the 'Y' tee into the valve house and in the foreground the equal tee giving the connection on the other side of the valve house. The by-pass valve is clearly shown between the two connections"; Ref M147; dated 2 June 1947 |