How to open the heating valve cap?
You describe the problem is not accurate, heating valve, you can not take their own disassembly.
You need to put down the "two point" to the top of the same depth to take the top into the depth must be appropriate, not deep, not shallow, on both sides of different depth not, so we must use special tools.
The cap must be specially used (keys) to get it down. This special tool is different for every heating company.
