I'll be doing plumbing on a new house and have a question. I see the houses
around here where the plumbers run the main vent and an average of 3
secondary vents right up through the roof wherever they enter the attic. On
one particular house I saw yesterday they ran a secondary vent up an
exterior wall which comes out the front of the house roof near the corner
which makes it about 2 feet or so away from the gutter. This looks
horrible. In fact any vent on the front of the house looks bad.

Can I elbow (45 and 45) my main in the attic so that it exits out the back
side of the houses roof? Can I also elbow any secondary vents toward the
back too? In addition could I tie all secondary vents into the main vent in
the attic?

I will be asking the inspector down the line but we are still waiting for
the house plans to be drawn up so I thought I would see what is done around
the country first.

TIA

Gary

gary wrote:

I'll be doing plumbing on a new house and have a question. I see the houses
around here where the plumbers run the main vent and an average of 3
secondary vents right up through the roof wherever they enter the attic. On
one particular house I saw yesterday they ran a secondary vent up an
exterior wall which comes out the front of the house roof near the corner
which makes it about 2 feet or so away from the gutter. This looks
horrible. In fact any vent on the front of the house looks bad.

Can I elbow (45 and 45) my main in the attic so that it exits out the back
side of the houses roof? Can I also elbow any secondary vents toward the
back too? In addition could I tie all secondary vents into the main vent in
the attic?

I will be asking the inspector down the line but we are still waiting for
the house plans to be drawn up so I thought I would see what is done around
the country first.

TIA

Gary


You're right on all counts.

IF allowed, run one full size vent to a roof terminal out of sight.
Connect all branch vents to this vent stack in the attic.

Jim

On Wed, 20 Jul 2005 09:45:18 -0400, someone wrote:


You're right on all counts.

IF allowed, run one full size vent to a roof terminal out of sight.
Connect all branch vents to this vent stack in the attic.

Yup. Multiple vents is typically done for economy of material and/or
ease of work. On a wide sprawling house if the vents are 60 feet
apart yeah it is understandable not to try to tie them together.
Personally as an owner, I'd prefer not to have unneeded roof
penetrations that might be fine now but maybe trouble later.

However, my house DOES have multiple vents - the 'wings' are not the
same height as the center section, and the bathrooms in the wings are
indeed something like 60 feet apart....



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Big house!


"v" wrote in message
...
On Wed, 20 Jul 2005 09:45:18 -0400, someone wrote:


You're right on all counts.

IF allowed, run one full size vent to a roof terminal out of sight.
Connect all branch vents to this vent stack in the attic.

Yup. Multiple vents is typically done for economy of material and/or
ease of work. On a wide sprawling house if the vents are 60 feet
apart yeah it is understandable not to try to tie them together.
Personally as an owner, I'd prefer not to have unneeded roof
penetrations that might be fine now but maybe trouble later.

However, my house DOES have multiple vents - the 'wings' are not the
same height as the center section, and the bathrooms in the wings are
indeed something like 60 feet apart....



Reply to NG only - this e.mail address goes to a kill file.

On Tue, 26 Jul 2005 05:35:04 GMT, someone wrote:

Big house!

Well, not small, but not the biggest in town either.

There is a 2-story center section with 1-story sections to each side.
Each of the lower sections has a bathroom, and it was much simpler to
run their stacks out the short distance thru the low roofs, than to
zig zag the vent runs over to the center section's vent (it is not 60
horizontal feet from each lower bathroom, to the center section's
bathroom, but it is pretty close to 60 feet between the lower
sections' bathrooms, being as the 2-story section is in the middle.

When we built the house, we had 6 and sometimes 7 people living there,
plus an office suite for a business we owned, so we actually had less
room per person then say 2 people living in a 1200 s.f. ranch.


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