Heating issue please help

icesailor

After another look, there are no other heating pipes in the photos. The other black pipe is a 2" white PVC pipe, connected with a "Mission Clamp" to a length of 2" ABS/DWV pipe. The other dark pipe in the photo is 3/4" heavily oxidized copper tube. Older than dirt. Probably a cold water pipe. Notice the long turn wrought copper ell. You don't see those often. Almost as seldom as the brass copper sweat fittings with the hole in the side to put the solder in.

This string has gone on for a long time. The OP should post a lot of photos around the boiler. Something is screwed up from when they replaced the boiler. He showed a photo of a convector cabinet radiator upside down. That was the last photo. Those convectors can be difficult to properly vent.

Some out there will NOT get the concept that if you don't have adequate pressure in the system on upper floors, you will not get proper water flow. Some out there who should know better, completely reject the concept that heating circulator pumps are just that. They don't create pressure to raise water to a higher height with higher pressure, they use pressure to overcome pressure. They don't pump air. A Hydraulic Mining Pump, in a heating system, with out adequate water pressure, will make the problem even worse. It won't pump at all, and when it is trying to pump, it might cavitate, making air, and adding to the problem.

Why there is such of a switch to gas/Scorched Air.