Water at a valve or connection
Note the first wet point, whether moisture is active and what is below the radiator.
This page focuses on visible radiators, their valves and connected water-side pipework. Describe what you can see at the radiator, without guessing at equipment elsewhere.

Note the first wet point, whether moisture is active and what is below the radiator.
Describe looseness, stiffness or visible damage. Do not force or remove the control.
Record which part feels cooler using only a safe touch observation; do not open or alter the system.
For water spreading from a radiator connection or pipe, see Leak Repair as well.
Identify the radiator, valve or visible connection and describe water movement or uneven warmth without guessing at a wider cause.
A clear message helps a plumbing professional understand the next step.