Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.
How much pitch is needed if a larger pipe is used for a run-out?

Bob Altshuler
Member Posts: 1
I just moved into a house with one-pipe steam and I'm having some problems that are being caused by a run-out to the up-feed riser for a 2nd floor radiator being pitched the wrong direction. To complicate matters the run-out passes over a major support beam.
For risers that aren't dripped The Lost Art of Steam Heating specifies a pitch of half-inch per foot and says "In runs over eight feet long where you can't get this pitch, use the next largest pipe."
My question is how much can you decrease the pitch if you use a pipe one size larger?
In particular, it might be possible to pitch this run-out 1/2 inch or maybe 3/4 inch in the right direction over its entire 12-foot length, but would that be enough?
It goes through the ceiling in a spot where it would be awkward to put in a drip directly below the riser, so I think the other option would be to change the piping of the run-out to either go below or around (both above and below) the support beam and put the drip where it goes under the beam, as described in Lost Art in the section on running steam mains around obstructions.
Thanks in advance for any suggestions,
-Bob
For risers that aren't dripped The Lost Art of Steam Heating specifies a pitch of half-inch per foot and says "In runs over eight feet long where you can't get this pitch, use the next largest pipe."
My question is how much can you decrease the pitch if you use a pipe one size larger?
In particular, it might be possible to pitch this run-out 1/2 inch or maybe 3/4 inch in the right direction over its entire 12-foot length, but would that be enough?
It goes through the ceiling in a spot where it would be awkward to put in a drip directly below the riser, so I think the other option would be to change the piping of the run-out to either go below or around (both above and below) the support beam and put the drip where it goes under the beam, as described in Lost Art in the section on running steam mains around obstructions.
Thanks in advance for any suggestions,
-Bob
0
Comments
-
min. pitch
if you just break the bubble on a torpedo level you should be o.k.0
This discussion has been closed.
Categories
- All Categories
- 86.7K THE MAIN WALL
- 3.1K A-C, Heat Pumps & Refrigeration
- 56 Biomass
- 423 Carbon Monoxide Awareness
- 102 Chimneys & Flues
- 2K Domestic Hot Water
- 5.6K Gas Heating
- 103 Geothermal
- 158 Indoor-Air Quality
- 3.5K Oil Heating
- 68 Pipe Deterioration
- 935 Plumbing
- 6.2K Radiant Heating
- 385 Solar
- 15.3K Strictly Steam
- 3.4K Thermostats and Controls
- 54 Water Quality
- 43 Industry Classes
- 47 Job Opportunities
- 18 Recall Announcements