Removing a radiator and capping off the pipes involves several steps to ensure safety and prevent leaks. Here's a comprehensive guide:
Step-by-Step Guide to Radiator Removal and Capping
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Turn Off Your Heating System: Begin by switching off your central heating system entirely. This prevents hot water from circulating through the radiator during the process. Allow the radiator to cool completely before proceeding.
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Isolate the Radiator: You need to isolate the radiator you intend to remove. Locate the valves on either side of the radiator.
- Lockshield Valve: Typically found at one end of the radiator, this valve often has a plastic cap. Remove the cap and use an adjustable wrench or pliers to close the valve completely. Count the number of turns it takes to close so you can re-open it to the same setting later if needed.
- Thermostatic Radiator Valve (TRV) or Manual Valve: At the other end, close the TRV or manual valve by turning it to its lowest setting or the "off" position. If it's a manual valve, simply turn it clockwise until fully closed.
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Drain the Radiator:
- Place a container or tray under the valve where you plan to drain the water.
- Use a radiator bleed key to open the bleed valve (usually at the top of the radiator). This allows air to enter and the water to drain more easily.
- Carefully loosen the nut connecting the valve to the radiator body on one side. Be prepared for water to start flowing out.
- Control the flow by adjusting how much you loosen the nut. Allow the radiator to drain as much as possible into your container.
- Repeat the process on the other side.
- Once drained, carefully tilt the radiator to get any remaining water out. You might need some old towels to catch any spills.
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Loosen the Other End: Now that most of the water is drained, fully disconnect both valves from the radiator. Have a container ready for any last drips.
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Remove the Radiator from the Wall:
- Carefully lift the radiator off its brackets. It might be heavy, so get assistance if needed.
- Once removed, carefully carry the radiator outside or to a suitable place for disposal or storage.
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Capping Off the Radiator Pipes: This is the most crucial step to prevent leaks.
- Identify the Pipe Size: Determine the size of the radiator pipes (usually 15mm or 22mm).
- Purchase Compression Stop End Caps: Buy two compression stop end caps of the correct size. These caps are specifically designed to seal off pipes.
- Apply PTFE Tape: Wrap PTFE tape (also known as plumber's tape) clockwise around the threads of the olive (the small brass ring that sits on the pipe). This will help create a watertight seal.
- Install the Caps: Slide the nut and then the olive onto the pipe. Push the stop end cap firmly onto the pipe.
- Tighten the Nuts: Tighten the nut onto the valve body using an adjustable wrench. Tighten firmly, but avoid overtightening, which can damage the fitting. A quarter to half turn past hand-tight is usually sufficient.
- Test for Leaks: Once both pipes are capped, slowly turn the heating system back on and check for any leaks around the capped connections. If you spot any leaks, tighten the nuts slightly.
Tools You'll Need
- Radiator bleed key
- Adjustable wrench (two are helpful)
- Container or tray for draining water
- Old towels
- PTFE tape (plumber's tape)
- Compression stop end caps (correct size for your pipes)
Safety Precautions
- Always turn off the heating system and allow the radiator to cool completely before starting.
- Be prepared for water spills; have towels and containers ready.
- If you're uncomfortable with any of these steps, consult a qualified plumber.
- Dispose of the drained water responsibly. It may contain rust inhibitors or other chemicals.
By following these steps carefully, you can safely remove a radiator and cap off the pipes to prevent leaks.
