Unfortunately, the provided reference is incomplete and doesn't offer specific instructions on how to turn off the water supply to a radiator. The video snippet only mentions the valve and lock shield. However, here are general instructions that typically apply:
Important Safety Note: Before proceeding, understand that turning off the water supply to a radiator might involve isolating the radiator or draining the entire heating system, depending on your plumbing setup. If you're unsure, it's best to consult a qualified plumber.
Steps to Turn Off the Water Supply to a Radiator:
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Identify the Valves: Locate the two valves connected to your radiator. One is usually the thermostatic radiator valve (TRV) or a manual valve, and the other is the lockshield valve. The lockshield valve often has a plastic cap on it.
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Close the TRV/Manual Valve: Turn the TRV or manual valve clockwise until it's fully closed. This should stop hot water entering the radiator.
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Close the Lockshield Valve:
- Remove the Plastic Cap: Carefully remove the plastic cap from the lockshield valve.
- Count the Turns: Before closing the valve, count how many full turns it takes to close it fully. Write this number down. This is important so you can reopen it to the same setting later, ensuring proper system balancing.
- Close the Valve: Using an adjustable wrench or pliers (protect the valve with a cloth to avoid scratches), slowly turn the lockshield valve clockwise until it's fully closed.
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Check for Leaks: After closing both valves, check around them for any signs of leaks.
Important Considerations:
- System Pressure: If you only want to isolate the radiator temporarily (e.g., for painting), these steps are usually sufficient. However, if you need to disconnect the radiator entirely, you may need to drain the radiator to release pressure and prevent water from spraying out when you disconnect the pipes.
- Balancing: Remember the number of turns you used to close the lockshield valve. When you reopen it, return it to the exact same setting to maintain the heating system's balance. An unbalanced system can result in some radiators being much hotter than others.
- Central Heating System Type: The exact procedure might vary depending on whether you have a sealed or open-vented heating system. Sealed systems are more common and generally require less intervention when isolating a radiator.
When to Call a Professional:
- If you're not comfortable working with plumbing.
- If you encounter any leaks or problems during the process.
- If you need to completely remove the radiator.
- If you have an older or complex heating system.
