Toilet Trap

I'm hoping someone can shed some light on this. A buddy of mine claims he's seen a trap in the plumbing under a toilet. He says he wouldn't rough one in but that it's not too unusual in some houses.

In 30 years and maybe a dozen or 2 throne installs, I've never seen this.

Sibi

The toilet has an integral trap and if there was a trap on the line it would be double trapped which causes problems...

I believe that 100 or so years ago...there may have been toilets with the trap under. It would be unusual to find one today.

If you put a trap under a normal toilet with integral trap, it would most likely clog the first time you used it.

toilets

Years ago Delta made a fiberglass one piece 1.6 gpf toilet. A customer bought one for his business and installed it himself. Then he called and wanted me to check why it would not flush. I pulled the toilet, and told him that since he had a "P" trap in the floor under it, that a low flush toilet would never work, but his old high volume one probably had enough force to work its way through it. So he reinstalled the old toilet. The only toilets that EVER had a trap in the floor under them were the original hopper toilets.

Thank you guys for the quick replies. I do appreciate it.

Sibi