[Ignitionnet]

We already know what type of network he is on. He has a run from a cabinet based tap not from a line based one.

The CATV covers are inspection covers, they don't necessarily indicate the presence of any hardware beyond ducting, and don't necessarily exist for any purpose beyond to all easy access to cabling in case of break.

There is no requirement to amplify every 100m.

The 'water mains' metal plate outside each home is a customer drop, not a tap. Line based taps live under inspection covers, occasionally next to waterproof housings for telco, and occur much more regularly than every 100m. Chances are you have a line back to cabinet if you only have inspection covers every 100m.

EDIT: Also it is not possible and would also be entirely pointless to replace a line tapped customer run with a dedicated one back to the cabinet with the bridge amp / node. It doesn't happen, especially as any fault with the line would affect all customers so that would need replacing and any fault specific to a single customer on a line would be confined to their tap port and the run from tap through to home.