View Full Version : Shower drain
12-05-2008, 12:46 PM
2 inch horizontal drain back vented with 1&1/2 inch to main stack with wye & 45.what is the reason for disallowing the use of a TY to elliminate the 45?could have found the ans. reading previous posts but most posters talk in code (the other code),like what part of the fitting is the back or heel?
12-07-2008, 07:01 AM
The answer is quite simple...
The horizontal drain requires the use of a wye and 45 or, a combo.
Actually, if you cannot see the reason by looking at the two different fittings, maybe you should not be doing the job. The TY, assuming you are referring to a sanitary tee and not a combination Y-1/8 bend, has negligable sweep and the code specifies the amount of sweep for ANY fitting below the overflow level of the fixture. If you are refering to a combo, then it is the same as a Y and a 1/8 bend/45.
12-07-2008, 01:50 PM
Both of these can be used on the horizontal
The SanTee can not be used on it's back.
It has to be vertical.