Adding Bathroom with No Access to Roof Venting

[oldsalt]

First, I appreciate the thoughtful suggestions of all those that read and reply to my posting.

QUESTION: I am trying to install a bathroom on the 1st floor of a 2 story house that has an attic, but whereby there is no existing vent line to tap into and there is no easy way to get from the 1st floor out thru the roof with a new vent line.

Bath Fixtures to Install:
1.) Toilet
2.) Bathroom sink
3.) Bath tub/shower

EXISTING SPECS: The waste connection for the above fixtures to the existing drain line (stack) is 30 feet away and this line goes into the main waste/sewer line in the concrete basement floor.

PROBLEM: Running a vertical vent line from the first floor to the roof, I have to cut a hole in the ceiling and through the 2nd floor and then through the 2nd floor ceiling and into the attic and then through the roof sheathing and through the slate roof tiles. Even if I make a pipe chase because of the location it will butcher the 2nd floor bedroom and cutting through slate tiles is always a pain in the butt and compromises the integrity of a 110 year old roof.

PLEASE HELP.....any suggestions will be greatly appreciated.

Someone suggested that I run one vent line connecting all the fixtures and terminating it in the wall in a vent device.

Although I will not be pulling a permit and code enforcement is not an issue, I sure don't want to invite problems or do something that later bites me in the butt.

Thanks.
OldSalt

[Mr_David]

AAV valves Let air in but do not allow gas to escape.
They should be avoided and only used as a last resort.
If the roof is your biggest concern, tie it into an existing vent already going through the slate.
You could run the vent up the outside of the house, tuck in back into the attic under the roof eve and tie it into an existing vent .

[johnjh2o]

Originally Posted by oldsalt

First, I appreciate the thoughtful suggestions of all those that read and reply to my posting.

QUESTION: I am trying to install a bathroom on the 1st floor of a 2 story house that has an attic, but whereby there is no existing vent line to tap into and there is no easy way to get from the 1st floor out thru the roof with a new vent line.

Bath Fixtures to Install:
1.) Toilet
2.) Bathroom sink
3.) Bath tub/shower

EXISTING SPECS: The waste connection for the above fixtures to the existing drain line (stack) is 30 feet away and this line goes into the main waste/sewer line in the concrete basement floor.

PROBLEM: Running a vertical vent line from the first floor to the roof, I have to cut a hole in the ceiling and through the 2nd floor and then through the 2nd floor ceiling and into the attic and then through the roof sheathing and through the slate roof tiles. Even if I make a pipe chase because of the location it will butcher the 2nd floor bedroom and cutting through slate tiles is always a pain in the butt and compromises the integrity of a 110 year old roof.

PLEASE HELP.....any suggestions will be greatly appreciated.

Someone suggested that I run one vent line connecting all the fixtures and terminating it in the wall in a vent device.

Although I will not be pulling a permit and code enforcement is not an issue, I sure don't want to invite problems or do something that later bites me in the butt.

Thanks.
OldSalt

What will bite you in the butt is not pulling a permit. This will happen when you try to sell the house. In the offer to purchase you have to state that there are no none conforming violations.

John