Latest Discussions : Plumbing

electricgirl

05:06PM | 03/02/04
Member Since: 07/20/03
17 lifetime posts
What is the definition of an s trap?

plumber Tom

05:46PM | 03/02/04
Member Since: 05/10/03
801 lifetime posts
Is a trap that passes thru a floor. When you connect the j bend to the p bend you have an s trap. It's fuction is to prevent sewer gas and vermin.

electricgirl

05:55PM | 03/02/04
Member Since: 07/20/03
17 lifetime posts
what is a j bend?

our inspecter called what we did an s trap.

I ______90bend at wall

I I I

-- I____________

ptrap horizontal run inside wall

it doesn't pass thru the floor.

I don't understand how it is considered an illegal s trap.

Any ideas?

electricgirl

05:58PM | 03/02/04
Member Since: 07/20/03
17 lifetime posts
it appears that my picture didn't post well.

the drain pipe coming out of the wall was too low. so we used a 90 bend upwards.

then connected the p trap.

the drain pipe in the wall runs horizontal.


plumber Tom

06:39PM | 03/02/04
Member Since: 05/10/03
801 lifetime posts
Then you have a "P" trap. P traps are used thru walls. A better way is to use an extension tailpiece. Who said it was illegal? The only person who has jurisdiction on the plumbing code in your locale is the plumbing inspector, NOT your home inspector. No fixture is allowed by code to be "double" trapped so that's what they may be looking at. If this is a situation where you are selling your home, then you may need a registered master plumber's certification. In my area, most honest realtors get certs for plumbing,electric,termites and the roof. If a master plumber gives you a cert and say's the drain is ok then go with that.

electricgirl

02:59AM | 03/03/04
Member Since: 07/20/03
17 lifetime posts
It was my plumbing inspecter. We are building our home.

sometimesright

08:34AM | 11/13/06
Member Since: 11/12/06
1 lifetime posts
The trap described above may be an S trap, particularly if the 90 degree elbow is below the bottom of the P trap. A siphon would be created by the water passing down toward the elbow. If the drain is not vented near the sink, a P trap is equivalent to an s trap. It would be corrected by connecting the p trap horizontally to a vented drain (the connection is a T with the vent upwards, the P trap horizontal and the drain downwards), or, if the drain is not vented, using an air admittance valve at a T under the sink with the the P trap horizontal, the air admittance valve above and the drain downwards. The international building code requires the air admittance valve to be above the flood level of the sink, but I've seen manufacturer's instructions on the air admittance valve package indicating that it is OK as long as it is 6 inches above the trap. An P trap connected to an unvented drain pipe is the equivalent of an S trap.


Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply choose button

Anonymous

Post new button or Login button
Register