Problem: No hot water in kitchen sink but hot water works in bathroom sink and bathtub. All cold water taps work.
I initially thought the problem was an airlock but after taking off the hot water tap handle, I found a lot of hardened "gunk" around the headgear nut. I cleaned it with some wire wool and loosened it with some WD-40 and I managed to get a full flow of hot water. So I've identified that the problem is somewhere in the headgear/washer rather than the piping and now I need to turn off the hot water supply.
Turning off the cold water supply is easy - there's a stop valve underneath the sink. The hot water however, does not have one.
After reading relevant pages in my 'B&Q: You Can Do It' book and identifying all the pipework in my house, the only way that I can see how to turn off the hot water supply is by stopping the cold water supply to the hot water cylinder and then draining all the hot water taps.
Is this the correct method or is there another method (or hidden stop valve) that I should follow (look for)?
If correct, do I need to turn off the boiler before draining the hot water cylinder?
Do I need to drain the whole cylinder or can I just partially drain the cylinder?
Also on a side note, my mum seems to think that the hot water in the kitchen is on a different supply to the hot water in the bathroom. In which case, I'd need to follow a completely different method. Could there be any truth to this?
I initially thought the problem was an airlock but after taking off the hot water tap handle, I found a lot of hardened "gunk" around the headgear nut. I cleaned it with some wire wool and loosened it with some WD-40 and I managed to get a full flow of hot water. So I've identified that the problem is somewhere in the headgear/washer rather than the piping and now I need to turn off the hot water supply.
Turning off the cold water supply is easy - there's a stop valve underneath the sink. The hot water however, does not have one.
After reading relevant pages in my 'B&Q: You Can Do It' book and identifying all the pipework in my house, the only way that I can see how to turn off the hot water supply is by stopping the cold water supply to the hot water cylinder and then draining all the hot water taps.
Is this the correct method or is there another method (or hidden stop valve) that I should follow (look for)?
If correct, do I need to turn off the boiler before draining the hot water cylinder?
Do I need to drain the whole cylinder or can I just partially drain the cylinder?
Also on a side note, my mum seems to think that the hot water in the kitchen is on a different supply to the hot water in the bathroom. In which case, I'd need to follow a completely different method. Could there be any truth to this?