wrote in message
...
A former owner installed a toilet with no vent. it never caused big
troubles, but i had to pull it some indoor french drain can be
installed. the flange is cracked. basement toilet used mostly for
emergencies....

anyhow want to replace the sewer line, its most terracota pipe with
tree roots.

any suggestions on venting it properly?

there are those indoor vents used for smaller applications, is there a
large version for toilets?

on rare occasions the trap water would disappear.......

theres no conveient vent line available

suggestions appreciated


Plumbing codes vary around the country so all I am doing is sharing this
information with you for you to consider.

My current home, built in 1995 in an over inspected county has a 1.5" vent
pipe for the john in the half bath and only a 2" vent for the entire full
bath that is roughed in in the basement ( the 3 fixtures each have a 1.5
that ties into a 2" that passes to the attic and connects to the main
stack). All of the pipes tie into one or more of the main stacks in the
attic and pass through the roof using a 3 or 4" pipe.

I have worked on a lot of homes in the last 35 years and have seen entire
baths vented using 1.5" pipe that expands to 3" before exiting the attic.

Personally, I would have no problem using a 2" pipe to vent this. Unless
you are located in a ornery state, you local plumbing inspector should be
happy to answer this question for you. A lot of places homeowners can do
the work legally as long as it is inspected and approved.

The disappearing trap water could be caused by evaporation if the lid is
left up and the fixture not used for a couple of weeks.


Colbyt