There is a Tee at that point that continues on to feed my gas stove
and dryer. The only way to eliminate that Tee is to disconnect
everything from the kitchen on back, which is a lot of pipe and
fittings. So a cap or plug is the easiest solution. It would not be
buried entirely in the wall. I actually have to drop the ceiling a
little at that point due to the other pipes, so I could put in an
access door to get to it.
Uniform Mechanical Code 805.1 An angle greater than 45 degrees from
the vertical is considered a horizontal run. The total horizontal run
of a vent plus the length of horizontal vent connector shall not
exceed 75 percent of the vertical height of the vent.
I don't think anyone knows what she's talking about either. That
in terms of pitch, connection, etc looks like mine and dozens of
seen. Only thing that is different is whatever that rectangular
is on the vent near the heater.
There might be. Without seeing what feeds what I can't give an honest
Normally a 3/4" line feeds two 1/2" lines because there is a limit to how
much gas can flow through a given pipe size. By feeding both units from a
single line you may starve one or both units when they cycle on at the same
The size of the pipe each unit needs is determined by the BTU input rating
of the device AND the length of the total pipe run.
You may want to gather more information and compare what you have and what
you need to the specs contained on this page:
Please come visit http://www.househomerepair.com
On Sat, 22 Jan 2011 20:37:22 -0800 (PST), Mikepier
I don't know, but it looks odd to me.
My basement is similar to yours, with the gas supply running up near
Similar furnace and HW tank placement too.
The difference is the drops to the furnace and HW tank.
Can't see the original drop to your old tank.
On mine that's a straight drop from the reducer so the pipe runs a few
inches off the tank, parallel. There's a couple 90's, nipples and a
union at the bottom to bring it to the front HW tank gas connection.
For the furnace the reducer it faced horizontal, and maybe a foot of
pipe brings it over about a foot near the joists, then a 90 drops it
straight down with alongside the furnace. There's a 90 level with the
furnace gas feed to bring it in.
So the big difference is there are no gas pipes to trip over and break
down low, and none in the way.
Good thing too, since my furnace access panel faces the wall.
I know if I were re-piping any gas I would keep as much pipe near the
joists as possible.
Since you're closing that in and have no need to get back there,
you're probably ok.
I really don't like that unsupported 90 in the corner.
There are scenarios where an oaf falls down back there on his ass and
the pair of pliers in his back pocket snags it.
Maybe you can't imagine those scenarios, but I can (-:
On the subject of gas feeds, here's how mine works.
It's circa 1959, and was code then.
Near the furnace the main line (1 1/4" I think) reduces to 3/4"
for the furnace drop and straight on. That's the first hit.
The furnace drop is further reduced to 1/2" at the furnace.
Next the 3/4" has a reduced 1/2" drop to the HW tank.
A bit further there's a full 3/4" tee feeding up to the kitchen.
After that there's a reduced 1/2" run and drop to the dryer.
What's this tell me? Not too much.
Full volume reduced to 3/4" at the furnace, which takes a 1/2" feed.
Maybe the original furnace took more.
1/2" to HW tank and dryer. It works.
3/4" to kitchen stove?
That's a bit puzzling.
Only thing I can figure is the gas company engineers' wives
actually cooked back in the day, so they wanted to stay on the right
side of them with consistent oven temps.
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