For decades, microbore central heating was the "go-to" choice for heating installers in the UK. Renowned for its speed of installation and minimal disruption to décor, it utilizes narrow pipework (usually 6mm, 8mm, or 10mm in diameter) rather than the standard 15mm/22mm copper.
Microbore’s small bore makes it highly susceptible to air locks—pockets of trapped air that stop water flow. microbore central heating problems
Because the pipes are so narrow, the resistance to water flow (hydraulic resistance) is high. The boiler pump has to work incredibly hard to push water through the system. For decades, microbore central heating was the "go-to"
