View Full Version : 3 Shut off valves under bathroom sink?
sfphoenix75
03-01-2007, 02:52 PM
Quick question: has anyone seen a bathroom sink vanity with three shutoff valves underneath? I just saw one at a hotel in Atlanta and I was curoius why there's a third valve.
The first two run to the hot and cold water faucets, as expected. The third connects smack into the tailpipe/p-trap.
Anyone familiar with this?
jimbo
03-01-2007, 06:21 PM
The one thing that is sometimes run into a lav tailpiece is a condensate drain from an air conditioner, but I don't know why it would have a valve on it.
Is there a floor drain in the room? If so that might be a tailpiece trap primer and the plumber did not know how to go from the tailpiece to the wall without using the valve as a reducer.
sfphoenix75
03-02-2007, 06:29 AM
I think you might have got it hj, as there was a small floor drain under the vanity sink area. I'm still unclear on what the connection is between a tailpiece primer into the vanity trap and the floor drain. I thought primers were meant to keep the floor drain trap wet?