Mainline is a master plumbing practice: copper cut to the millimetre, rooms that read like wiring diagrams, and taps that feel inevitable.
Every Mainline job starts in the workshop: copper cut to the millimetre, fittings catalogued like a library.
Underfloor systems laid out with the care of cabinetmakers, then hidden beneath your floors for decades.
A Mainline plant room reads like a wiring diagram: every valve labelled, every run true.
From first fix to final polish, it all ends at a tap that feels inevitable.