Which is good P- trap/S- trap

While standing in a shop selling sanitary items, he overheard a conversation with a contractor and a salesman. The client’s favorite closets here are all S traps. But I do not agree with keeping it. Why don’t you put more on P trap models? β€˜

P trap models are less available except for wall mounting.

There was total confusion when I heard this conversation. Asked the party anyway. What’s the problem with this S trap?

β€˜The water seal is sometimes missed in the S trap. So the smell is likely to come. So I do not generally recommend it. In many countries, the law prohibits its use in plumbing. ‘

This was a new knowledge for me. If it was banned in foreign countries, there would be a strong reason for it. Although it is not a subject in our syllabus, it is an important subject that has so much to do with eternal life so let us know more.

Traps are used in plumbing to prevent gas from entering the room from the waste line (sever line). The U-shaped curved part acts as a gas seal, preventing gases from entering the building through the sink and commode. It also protects against pests that come through the seawater line.

There are different types of traps in the plumbing system such as S trap, P trap, Q trap, Bottle trap and floor trap. S and P indicate the shape of the trap. Although the purpose of all these is the same, at the practical level different types of traps are used depending on the situation. The S trap is one of the earliest traps used since the eighteenth century. But later, some serious problems were found in such traps and they were replaced by P trap-like systems.

S traps have a problem that eliminates the very purpose for which the traps are used. This means that the “siphon effect” of the pressure difference is greater in such traps, so that more of the water in the trap is drawn into the waste line and the water seal is often lost. Thus the situation is created for the gases to enter the building. Therefore, the use of S traps for plumbing is illegal in many countries, including the United States.

Even though things are like this, why is it that there are still no such restrictions in our country? Talking to friends working in the field, he said that in general, these issues have not been addressed. Then there is the problem of siphon dry because the air vents are put on. Toilet system companies with S traps in our country are increasingly releasing due to the demand for practicality. This means that in the toilets on the ground floor, the waste pipeline can be placed under the floor, so the S traps are more convenient.

In cases where too much water is flushed together in the wash basin and commode, the water seal is lost due to the siphon dry effect in the S traps, so the problem of water seal loss can be avoided by slowly adding a little more water after use.