View Full Version : Floor drain venting
coach42
Jul 28, 2012, 04:47 PM
Does a vent on a floor drain go before or after a p-trap?
speedball1
Jul 28, 2012, 05:48 PM
does a vent on a floor drain go before or after a p-trap? Somebody gave you bad advice. Floor drains come with a built in trap and in my code area is the only fixture the doesn't require a vent./ However, your code may require a trap primer. Good luck, Tom
massplumber2008
Jul 29, 2012, 07:16 AM
Depending on the application, vents are required on floor drains in my area. You install the vent before the trap (see drawing)... usually within 3 feet of the trap. A trap primer is also required in most cases.
Exactly what is the application you are installing this for?
Let us know more, OK?
Mark
speedball1
Jul 29, 2012, 07:26 AM
So, we have two different answers. To see which one fits your case contact your local Building Department. Good luck, Tom