To fix a leaking radiator valve, follow these steps:
- Turn off the heating system: Before you start fixing the leaking valve, turn off the heating system to avoid any accidents.
- Drain the radiator: Use a radiator key or pliers to open the bleed valve on the radiator and drain the water out into a bucket or a bowl.
- Remove the valve cap: Using an adjustable wrench, unscrew the valve cap located at the end of the valve spindle. The valve spindle is the rod that extends from the valve.
- Remove the valve packing nut: Using a wrench, unscrew the valve packing nut, which is the hexagonal-shaped nut located beneath the valve cap. Be careful not to damage the valve stem while removing the nut.
- Replace the valve washer: Remove the old valve washer from the valve stem and replace it with a new one. Make sure the washer is the correct size and shape for the valve.
- Reassemble the valve: After replacing the washer, reassemble the valve by screwing the valve packing nut and valve cap back in place.
- Turn on the heating system: Once the valve is reassembled, turn on the heating system and check for any leaks. If there are still leaks, tighten the valve packing nut a little more until the leak stops.
If the above steps do not solve the issue, you may need to replace the entire valve assembly. It is recommended to seek the help of a professional plumber in such cases.