Short horizontal runouts for one pipe steam

Chris_15

I've got a one-pipe steam system. In the back of the house there's a 1-3/8" riser that feeds 3 radiators (one each on 1st, 2nd, 3rd floors). It's dripped in the basement. Everything seems to be properly sized and work well.

Due to a bathroom remodel, I want to relocate the portion of riser that runs through the 2nd floor by about 36". (see my pathetic keyboard graphics below. "R" is a radiator.)

I don't know how to treat the short pieces of horizontal runout that this would entail (one in the joist bay above the 1st floor ceiling to get from the old to the new riser location, and then another above the 2nd floor ceiling to get from the new riser location back to the old one, where the 3rd floor radiator sits.)

There isn't a lot of space for the mechanics to get their hands in there. For a short (3') length of horizontal, can we get away with using right angle tees and bends and having it be truly horizontal (as opposed to pitched?)

R
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R __|
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Chris_15

Ignore the graphics

> I've got a one-pipe steam system. In the back of

> the house there's a 1-3/8" riser that feeds 3

> radiators (one each on 1st, 2nd, 3rd floors).

> It's dripped in the basement. Everything seems to

> be properly sized and work well.

>

> Due to a

> bathroom remodel, I want to relocate the portion

> of riser that runs through the 2nd floor by about

> 36". (see my pathetic keyboard graphics below.

> "R" is a radiator.)

>

> I don't know how to treat

> the short pieces of horizontal runout that this

> would entail (one in the joist bay above the 1st

> floor ceiling to get from the old to the new

> riser location, and then another above the 2nd

> floor ceiling to get from the new riser location

> back to the old one, where the 3rd floor radiator

> sits.)

>

> There isn't a lot of space for the

> mechanics to get their hands in there. For a

> short (3') length of horizontal, can we get away

> with using right angle tees and bends and having

> it be truly horizontal (as opposed to

> pitched?)

>

> R |__ | | R __|

> | | R| |



The system squished them onto one line. Here's another try

Chris_15

Ignore the graphics in previous post

The system squashed them onto one line.... in words:

Old:
Riser staight up from basement to floor of 3rd floor. Beneath 1st, 2nd, 3rd floor: tee, nipple, right angle, spud valve.

New: As before, except beneath 2nd floor, right angle and 36" of horizontal runout to new riser location, angle up into new riser, then below 3rd floor angle into 36" of horizontal run back to old riser location, right angle, spud valve.

Steamhead

However you do it

it must be pitched so the water will drain into the drip line at the base of the riser. Otherwise you will get lots of banging!

The pitch should be 1-inch in 10-feet or more. Hope this helps...

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