Depending on which code your using, I normally vent a trap with in 2 ft of the fixture and I place the trap no further then 2 ft from the fixture EXCEPT for floor drain as I can install them with in 15 ft of a vented line
2 feet < NOT exactly
Depends on the codes and type of "drain"For example a trap can be located 2 feet from a vented line and the fixture located 2 feet from the trapA floor drain in some codes can be located up to 15 Feet from a vent, then you have indirect drain lines such as an ice maker or condensate "drain" from a walk in cooler which can go up to 25 feet but empties into a trapped and vented fixtureStorm lines (Drains) for example do NOT need a vent but if the enter a combination sewer then they need to be trapped to prevent sewer gases from entering a structureYes, the gasket between the overflow pipe and the tub can go bad, or it can leak around where the pipe is attached to the drain.
Radio Shack "drain pipe tracer".
The washing machine is pumping out water faster than the drain pipe can handle. A trap in the drain pipe to which the washing machine hose is attached is required and that makes the water flow slower than you might expect. Having the washing machine some distance from the main drain line requiring a long horizontal run in the machine's drain pipe will also result in a slower flow. Other causes could be: undersized waste pipe, backward wyes or santees, backgraded piping, backed up gray water system. An obstruction such as a checker piece or poker chip could be lodged within the pipe. Such an obstruction acts as a valve or flap that will pivot out of the way when a snake is pushed through the pipe but pivot closed when water attempts to flow through. Nowadays a two inch drain pipe is recommended. Some cities require two inches or larger. Do not seal around where the washing machine hose is hooked onto the drain pipe as this could overload components within the machine.
They are there so that the water that flows out the overflow skupper runs down and into the drain. When the drain pipe is mounted they end up sealed into the area between the inner and outer bowls of the sink.
Foul Air
Yes, a sewage drain pipe can be too large.
If you are talking about a roof water drain pipe to sewer it is illegal. If you are talking about a sink drain pipe well that is where they all connect to so yea.
dvw pipe = drain, waste and vent pipe.
11/2" 4 FU 100 ft ( Vent ) Check your local code for drainage
As long as the pipe going into the wall is straight, the rest of the drain pipe can be routed however it needs to be. Very often the trap is at an angle to the pipe in the wall.
There are multiple reasons to get your drain pipe inspected. One major reason to inspect a drain pipe is before buying a house to make sure everything runs correctly.
You can drain it directly into a drain pipe. Just make sure the the top of the drain pipe is even with the top of the washing machine. If not, the water from the washing machine will drain all of the time. There is no valve in the machine to stop the water from draining. The washing machine drains using a pump motor.