Replacing a radiator valve
🔒 Written by a Gas Safe registered engineer
May Need Pro💷 £20–£120⏱ 5 min
⚠️
This job may need a professional
Check the steps below first — if you\'re not confident, get it fixed safely today.
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⚠️ Do not attempt to remove a radiator valve without draining the system first — it will flood.
⚠️ Do not attempt to remove a radiator valve without draining the system first — it will flood.
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Most likely cause & what to check
1
Check if the valve is just dripping from the joint at the top (gland nut) — sometimes a gentle half-turn clockwise on the gland nut with a spanner can stop a minor weep.
2
If the valve body itself is cracked or leaking badly, do not attempt to remove it yourself. The system needs to be drained first.
3
Call a plumber. Tell them: "I have a leaking radiator valve — it's dripping from [describe where]."
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