A 3 or 4 inch pipe sticking straight up out of the ground? This is the clean out for the sewer line. If sewage is coming out of it, this means the sewer line is clogged or collapsed from there to the main city sewer. If you have a septic tank, the tank is full and needs to be pumped out.
The purpose of a sewer pipe is to collect waste from drains and peoples homes and transport it through the sewer system to the sewer plant. There it is treated and the water is recycled.
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.
A sewer smell coming from your bathroom sink could be due to a dried-out P-trap, which is a curved pipe under the sink that holds water to block sewer gases from entering your home. Try running water down the sink to refill the P-trap and eliminate the smell.
A pea trap in plumbing is a U-shaped pipe that holds water to block sewer gases from entering a building. The water creates a seal that prevents the gases from coming up through the pipe and into the building.
Water Jetting
ABOVE the sewer line and on an angle away
That depends alot on your location and what codes your jurisdiction has adopted. From the 2006 International Plumbing Code, "water service pipe and the building sewer SHALL be separated by 5 feet of undisturbed or compacted earth." There are exceptions, 1. "the required separation distance shall not apply where the bottom of the water service pipe within 5 feet of the sewer is a minimum of 12 inches above the top of the highest point of the sewer and the pipe materials conform to Table 702.3. 2. water service pipe is permitted to be located in the same trench with a building sewer, provided such a sewer is constructed of materials listed in Table 702.3. 3. the required separation distance shall not apply where a water service pipe crosses a sewer pipe, provided the water service pipe is sleeved to at least 5 feet horizontally from the sewer pipe center-line on both sides of such crossing with pipe materials listed in Table 605.3, 702.2, or 702.3." So, no, there is no minimum separation IF the materials you are using bear the correct ASTM #. (Your building sewer pipe will probably have ASTM F 891 stamped on it.)
A sewer is a pipe under the ground for carrying away water and waste.
A p-trap is connected to a drain pipe by being installed underneath the sink or fixture. The curved shape of the p-trap holds water to prevent sewer gases from coming back up the drain pipe.
It must be plugged up. try to snake it out.
That would be a p-trap, like what is located under every sink. This U joint holds water to prevent a sewer smell or odor from the sewer or tank from coming back into the house. It is a trap of water that prevents air gas from reeking your house out!
A sewer smell coming from your sink could be caused by a dried-out P-trap, which is a curved pipe under the sink that holds water to block sewer gases from coming up. Try running water down the drain to refill the P-trap and see if the smell goes away. If the issue persists, it may be a sign of a more serious plumbing problem that requires professional attention.