I am finishing up a basement that has been plumbed for a full bath.
After having the shower, toilet and sink hooked up I am finding that the
toilet clogs up a bit easier than the others in the house and I'm not
So, it occured to me last night that since we have not yet used the
shower that the water in the trap might be evaporating and that might
have an effect. I think the line from the shower connects in to the
toilet line at some point. Could that be a cause of am I completely
missing something else? Thanks in advance for any help.
Trap should have no ill effect. Pour a bucket of water into the
shower drain to fill the trap, JIC.
Clogging can be caused by the brand/model of toilet. Or, could
be wax ring spread too far into flange opening. Something fell
into the toilet. Even the brand of toilet paper can affect it.
The modern super-soft papers are much more prone to "clumping"
in the bowl passages.
To see if the drain from the toilet works properly, line up a couple
of large buckets of water. Dump them rapidly right into the bowl.
If water goes right down with no sign of overflow, the drain/vent is OK.
No water in the shower trap should have no effect on the toilet situation.
As a matter of fact, if the water evaporated in the trap, you should be
getting a foul sewer gas smell through out the place. Some possibilities
that come to mind are a lack of fall on the toilet drain line when
installed, possible debris that may have fallen into the pipe before the
fixture was set (floor tile, grout, paper, etc.) Some plumbers will put a
wad of plastic into the opening after they make their tie-in to keep this
trash out. Sometimes the stuff gets pushed down into the pipe. Hell, I've
even pulled pieces of 2 x 4's out before setting a commode. One common
problem is the wax ring. If the wax ring wasn't set down properly (on the
ring and not the bowl) it could have smeared to one side. It would still
hold a water tight seal, but it could cause the opening to be partially
blocked. I'd pull the bowl, check the seal, and run a hose down into the
drain pipe. See if it takes it. If so, then fill up a 5 gallon bucket of
water and pour it as quickly as you can down the pipe. This will simulate
the flushing of a toilet that you can't get from a garden hose. Your line
should be a minimum of 3" (but I've always preferred 4" - even with the new
low consumption bowls.) Hope this helps.
Jim Mc Namara
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