Heating Help

Steam Main Venting

I have been reading the wall for several years, just bought a house in S. Vermont with steam heat. I have a one pipe steam system with two mains each approx 45 feet long, 2.5 inch o.d. pipe. They currently have Dole #4 main vents at the end of the mains. One of these main vents is not venting, the other works. What size vent do I replace the non-working vent with? Is the #4 appropriate for the size main? My other question involves venting radiators, in rooms that overheat I have adjusted the Dole adjustable vents to lower venting settings and this is causing some whistling. Is this normal? Thanks Chris

Both your mains

should be vented with a Gorton #2. This is a much bigger vent than the Dole #4, which is positively Lilliputian. Your overheating rooms are the ones closer to the boiler, right? Once the Gortons are installed, you shouldn't have this problem. To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Steam Main Venting

I have been reading the wall for several years, just bought a house in S. Vermont with steam heat. I have a one pipe steam system with two mains each approx 45 feet long, 2.5 inch o.d. pipe. They currently have Dole #4 main vents at the end of the mains. One of these main vents is not venting, the other works. What size vent do I replace the non-working vent with? Is the #4 appropriate for the size main? My other question involves venting radiators, in rooms that overheat I have adjusted the Dole adjustable vents to lower venting settings and this is causing some whistling. Is this normal? Thanks Chris