I have a two pipe steam heat I need just a little help with at the end of the returns are two Hoffman f&t traps. There is only one Hoffman 74 main vent on the one return line that comes from one side of house. The other return pipe base no venting. There is also no venting on the steam main,only towards the end of the return lines. Also my radiators have a trap and a vent. They aren't suppose to be vented correct. The pressuretrol isn't cylce the burner and I read no pressure on the gauge. The gauge is new. Please help!