0
When the pipe goes down, and back up, and back down again, the first "up-curve" is called the trap because when the water goes down the drain, not all of it goes back up and down again (thanks to gravity). So there is a little bit of water there and it prevents any gas/odors from coming back up the sewer pipe. Provided that the pressure on the sewer-side of the trap does not exceed atmospheric pressure on the drain-side, the water will not get forced back up. Provided that the water is not allowed to evaporate, there will always be water there. And provided that there is enough water such that the top of the inside curve of the up-turn is lower than the top of the trapped water level, the trapped water will seal out the sewer gas.
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
What is p trap?
In plumbing, a trap is a U-, S-, or J-shaped pipe located below or within a plumbing fixture.
How to test plumbing trap?
Turn on the the water to the fixture. And let in run.
What are plumbing drain vents?
Plumbing drain vents equalize the pressure in drain piping in order to preserve trap seals on plumbing fixtures. Blocked or improperly sized vents can cause traps to dry allowing sewer gases to enter the building.
When was the sink trap invented?
1743 in England for the Duke of York and if you need the exact month check out the history of plumbing
What is a legal and common used trap?
building codes in the jurisdiction may require you to use a certain type of trap in certain plumbing designs.A bell trap is used in floor drains (although this particular trap is sometimes erroneously installed in a drainage system).Answers.comAnswers.comAnswers.com. So is a drum trap. S traps are much more common.A p trap is used for sinks
Which is the most common used trap in plumbing?
a "p" trap
What is p trap?
In plumbing, a trap is a U-, S-, or J-shaped pipe located below or within a plumbing fixture.
What is the best trap to use for plumbing?
A Vented Running trap with two clean outs or a P trap.
What distance from side and back wall should an s trap drain be located?
An S trap is not allowed in a plumbing system. Only a P-Trap
How to test plumbing trap?
Turn on the the water to the fixture. And let in run.
How many traps in plumbing and sanitary service?
One trap for each fixture and one main trap prior to leaving the structure
When do you use a bottle trap in plumbing?
We don't as many model codes will ban their use
What is the most commonly used plumbing traps?
"P" Trap after that would be running traps
Can a plastic plumbing trap be used with a metal pop-up assembly?
Yes, no problem
Does international plumbing code require a grease trap to be tied indirect or direct to sewer?
Direct
What is a trap house?
A trap house is a place usually in the ghetto used to sell all sorts of drugs and has nothing to do with plumbing, mice or rats
Is a 2 drain pipe and trap to big for a washing machine drain?
no, in fact most plumbing codes require a 2" drain/trap for washing maching drain.
