Mill-Town Terraces and Pipework From Three Different Decades
The terraced stock around Hightown and Littletown is the kind of housing where you open up a system and find the last forty years of plumbing decisions stacked on top of each other. Microbore added to an older gravity system, a combi fitted where a cylinder used to be, radiators moved during a kitchen extension and never rebalanced afterwards.
None of that is necessarily a problem. What it does mean is that a fault is often a symptom of an earlier compromise rather than a component that has simply failed, and replacing the part without understanding why it failed tends to produce a repeat visit. We would rather spend ten minutes working out what the system is actually doing than guess at it.