Repair a leaking radiator valve without draining
A Leaking Radiator Valve Is Often a Repair Problem, Not a Replacement Problem
A leaking radiator valve can look like a reason to drain the whole heating system and start replacing parts. Often, that is unnecessary. The useful skill is isolating the valve, identifying where the water is escaping, and changing the failed component without turning a small fault into a larger job.
This video from Allen Hart shows the repair clearly, including the practical decisions that matter more than confident-sounding maintenance advice. Keep towels ready, protect the floor, and do not assume every joint needs tightening. Overtightening can create another failure.
Design matters A valve that can be isolated and reached is a better piece of housing equipment than one buried behind boxing. Good maintenance is partly about the repair itself, and partly about whether the building allows a person to make that repair sensibly.
That is not abstract philosophy. It is the difference between a controlled job and an afternoon spent chasing water.