What is the minimum distance between the bottom of a sink and the trap attachment for a bathroom sink
1.5
An S trap would go through the floor. A P trap goes through the wall. As long as the drain is below the bottom of the sink, it should drain. Distance between the bottom of the sink, the trap and the drain does not matter, it just changes how much water stay in the drain. Normally it is just in the trap, but it can be above the trap if circumstances cause the trap to be lower than usual.
No and yes. Amendment (not from a professional plumber!): If you were simply running the sink drain into the shower drain and if there was not a reduction in pipe size, I would think you would be able to do that. I think the reason you need a trap for the sink has to do with code that requires a trap be no more than 24" from the basin to the trap arm. That being said, the pedestal sink in my house does not have a trap until after it drains below the floor.
The drain pipe should have a vent that goes up where the sink drain goes into it. That is where it vents. Sinks drain because there is nothing causing a vacuum when the water leaves the sink.
Directly under each sink.
1.5
An S trap would go through the floor. A P trap goes through the wall. As long as the drain is below the bottom of the sink, it should drain. Distance between the bottom of the sink, the trap and the drain does not matter, it just changes how much water stay in the drain. Normally it is just in the trap, but it can be above the trap if circumstances cause the trap to be lower than usual.
Infinite. It doesn't affect it at all. Vertical distance doesn't have an affect on a trap.
No and yes. Amendment (not from a professional plumber!): If you were simply running the sink drain into the shower drain and if there was not a reduction in pipe size, I would think you would be able to do that. I think the reason you need a trap for the sink has to do with code that requires a trap be no more than 24" from the basin to the trap arm. That being said, the pedestal sink in my house does not have a trap until after it drains below the floor.
There SHOULD be water in the "P-Trap" below the sink. The trap keeps sewer gas from entering the house. It's called a "P-Trap" because of the shape, it's shaped like the letter "P" on it's side. If the water drains from the trap, it's the right level.
You need to check with your local and state building codes, but I have done this many times before. Just make sure that it is utalizing a trap. If you go into the other drain below the other trap make sure you plumb in a new trap for the new sink
It is normal for dishwashes to discharge below the sink into the "S bend" (otherwise called the trap) this trap is there to stop the smell from the drain coming into the house. Often there is a spigot on the trap onto which the hose from the dishwasher fits, so if this is how yours is done you will find a roughly 20mm hose under your sink coming from the direction of the dishwasher and going into the side of the sink trap, also you will hear the waste water discharging into the trap as the dishwasher cycles.
If it's a sink drain , best to remove the entire pipe and P trap. I then take outside and hose them out.
A trap spoon is what happens when you leave a spoon underneath the facet in a sink. When you turn on the sink water splashes up everywhere and is generally a huge wad of hard to deal with. A trap laid with a spoon.
The drain pipe should have a vent that goes up where the sink drain goes into it. That is where it vents. Sinks drain because there is nothing causing a vacuum when the water leaves the sink.
Directly under each sink.
Directly under each sink.