radiator help

This hot water radiator looks to be piped directly into the system without the usual union or coupling and I have no idea how to remove it without cutting the pipe. Has anyone seen this before and know if there is a way to take it apart? Thanks.

We have a radiator that has not really worked well for some time in our second floor bedroom. It used to give off low heat but now the radiator is completely cold. The other radiator directly below it on the first floor has the same issue. We are a two family house so this radiator line runs up...

Ok, so recently I moved in to a dorm. I live in a small room, but with a huge radiator, that looks kind of like this: but with that knob on the upper side. Problem is that the knob is missing, and I can't turn off the water. It looks like this: Any idea how I can turn it off by hand, or...

Hoping to get some advice regarding connecting new (steel, not cast iron) radiators to existing piping. Contemplating oxygen-barrier, up to 200F pex. Unsure of what size PEX. Unsure if it is even a good idea. My home: built 1941, one story with basement, a bit over 1000 sq ft, closed loop hot...

Hello All. I have a one-pipe steam system. I have a two story cape house from the 1940's. Last heating season, I replaced the second floor air vent on the radiator with a hoffman #40. I was really impressed how quiet it was. This heating season I decided to replace the remaining six radiators...

I live in California and I want a radiator heating system in my home. It's an old spanish style home built in 1926. There was a furnace in the hallway as the only source of heat. And yes, California is very mild weather, but it can still get pretty cool in the winter mornings. I just want a...