Hiya, I recently had lost my central heating and a plumber came round, changed a valve with a Honeywell valve head and got it all working. Since then I've noticed the exterior pipe slowly leaking with water. I looked next to the water tank and can see water dripping into the pipe that goes outside. There are two pipes that finish just above that pipe inside (bottom right of picture) one comes from the tank and one comes from a blue valve (bottom left of picture).
When I twist the blue valve more water comes out. But I can't be sure this is where the water is coming from, due to the two options. I was hoping the blue valve may have just worn (it is a really old system) or not be sitting correctly as it never leaked before.
If it is the blue valve, I'd like to think this is something I could change myself.
So I was hoping someone could tell me if I'm on the right lines please?
