Megaflo 210L unvented cylinder, farmhouse conversion

A barn conversion in Darley Dale needed a proper hot water solution for a five-bedroom layout: two en-suites, a family bathroom, and a utility room. The owners wanted strong simultaneous flow rates — two showers running without anyone losing pressure. Unvented cylinder was the obvious answer.

Sized up to a Megaflo Eco 210L, fed off the new system boiler. Critical detail on any unvented job is the G3-compliant discharge pipework — the safety pipe from the cylinder's pressure-relief valve has to terminate somewhere safe (outside, visible, and tundish-discharged) so any failure is obvious before it becomes dangerous.

The discharge route was tricky given the property's stone walls. Core-drilling stone is slow work and one wrong angle leaves a permanent scar. We core-drilled cleanly with a diamond bit, sleeved the route in copper, and finished the external pipe in matching black metal so it disappears against the slate roof line.

Cylinder fitted, expansion vessel mounted, two-port valve wired in, dual immersion backup added in case the boiler ever goes down. Filled, flushed, tested, commissioned. G3 certificate issued, registered with the manufacturer, and a 25-year warranty against the cylinder itself.