The picture raises questions. If that is glowing due to heat, then something bad is happening. But maybe it is a bright light in a translucent pipe or something?
For a couple of days a year the plastic flue above my boiler does this - from the sun hitting it at the perfect angle. (Source: once thought my boiler was about to blow up.)
Those don’t look like PVC fittings, so I am guessing it is a metal pipe. The minimal loss of light at the overlapping sections and how it fades makes me think that it is truly incandescent.
The picture raises questions. If that is glowing due to heat, then something bad is happening. But maybe it is a bright light in a translucent pipe or something?
For a couple of days a year the plastic flue above my boiler does this - from the sun hitting it at the perfect angle. (Source: once thought my boiler was about to blow up.)
Likely a cast iron pipe that has grounded an electrical current. It is in fact, “something bad”.
Those don’t look like PVC fittings, so I am guessing it is a metal pipe. The minimal loss of light at the overlapping sections and how it fades makes me think that it is truly incandescent.