Venting Mains

John S.

you've got a riser within 6-8" of the end of the main. That means that riser won't heat properly (if at all) using the ideal option #3.

You'd have to extend the end of the main at least about 2' past that riser (with a t for the vent manifold of course) and repipe the drip to match.

stevenyc

Venting Mains - Which is my best option? Thanks.

I've purchased 3 Gorton #1's to vent the longest main run but I'm at an impasse as to which is my best option. I've drawn a really rough (I'm no artist) sketch of three options that I've come up with by piecing together advice from Steamhead, others and Dan's book. The drawing is of the end of the main where it bends down for the return which you can see clearly in the photo attached below.

Which of the options in the drwaing below is my best bet and if not one of these three, what other options do I have? Thanks for any help with this!


P.S. Here is the link to my previous post...

http://forums.invision.net/Index.cfm?CFApp=2&Message_ID=199540#Message198973

Bob W._3

Steve, there is another current post where a guy shows his Hoffman 75's venting through a ceiling cutout. Is that a plaster ceiling that can be cut to give you more room? Or is it concrete (like mine). Can't tell.

Here is the thread:

http://forums.invision.net/Thread.cfm?CFApp=2&Thread_ID=30453&mc=12

stevenyc_2

Unfortunately...

It's solid concrete. I wish I had room for a Gorton #2 or a Hoffman 75 and then I'd be done with it. Then again, Dan does say in his book that it isn't good to have a main vent at the end of the main because it makes the vent vulnerable to being damaged.

Perhaps the first option is best then??? I'm not sure. Thanks!

Steamhead (in transit)

I like #1 the best

since it gets all three vents away from the tee in the main. With #2, the center vent is right over the tee in the main so it could get hammered. And you don't have room for #3 because of that riser so close to the end.

Go with #1.

stevenyc

Sizing of pipe for the T

Thanks everyone for the quick replies.

So it looks like option #1 is my best bet but I forgot to ask in my original post what size of piping I should use for the T? I'm guessing 1" to 1.5" in diameter???

Thanks again.

Hitzkup

pipe size

3/4" should be good enough. as per gill & pajek's chart

mark sch

Rodney Summers

One thing to keep in mind

While #1 is a good option, I'd imagine that the main there is probably tilted downward moving to the left of the picture. As such, beware if everything else is at right angles and you tack on the extra vents exactly as #1, since that would presumably mean that condensate will collect at the far left end of the pipe. Perhaps you'll want to give the whole thing a 180 degree twist about a vertical axis.

-Michael

Steamhead (in transit)

Mike, you're absolutely right

Make sure the horizontal pipe has a slight pitch back to the main.