Toilet help

[curbshopper]

The garage at our new house has a toilet plumbed in ,we had never had a stool installed, when I did I find a slow drain after the flush, too slow. appears to not be vented. Could be something in drain, I have flushed with a hose. the sink drain is draining to accept the hose at full volume. the stool drain will fill up with the hose, and eventually drain all out. The garage is about15 feet from house I assume it is tied to home sewer Any thoughts before I break concrete, which I will do to put in shower.

 

[Leaflessshadetree]

What was covering the drain before you installed the stool? Any chance it was plugged with something?

 

[premierplayer]

pull the toilet, run a snake through line
dosen't tell if vented but will clear or tell you where blocked (how many feet - inches)

old toilet? put a closet auger through the toilet

 

[evildky]

If there is no vent stack, add a vent stack.

 

[HoosierMark]

If it is an old toilet and it is not putting enough water in the bowl to start the siphon action it will appear clogged. Simply dump 1/2 to 3/4 bucket of water in bowl fairly quickly to see if the flushing action starts. If it is a new toilet then it is probably the lack of a vent. You could also pull the toilet and use an expanding plug attached to a hose to force anything that is blocking the line thru from the water pressure. HD or Lowes have them in the plumbing sectiom

 

[bobemmerich]

I'd go with either it's clogged or not vented. Hopefully they didn't figure the house vent would suffice, or worse yet, just let it drain into a pit or culvert. If you're gonna break the concrete anyway, add a vent when it's exposed.

 

[TK LP]

If the rough in was installed under a permit, it's likely that your water closet is wet vented with the lavatory. A vent should be visible going through the roof. If not, check the attic to see if it is terminated there. If the lavatory is draining properly, without siphoning the trap, it is likely vented.

Modern low consumption water closets are do occasionally have issues with casting quality. I have installed fixtures that had to be replaced because they exhibited the behaviour you describe. I've seen this with expensive as well as low end fixtures, the faulty casting won't create enough of a siphon for proper evacuation.

As others have suggested, pull the fixture to see if there is a clog, if its clear, I'd replace the fixture.

 

[dfiler2]

The toilet should vent through the sink drain if there is no vent. I would bet a clogged line or a bad casting as mentioned above. I had the bad casting happen to me last winter, first time I'd seen that but there was no way to fix it. A new toilet solved the problem.