The short answer is yes, but like all answers comes with conditions. In a traditional residential Plumbing system all drain lines eventually connect together, everything is interconnected.
The long answer is that connecting fixtures to a drain system must follow certain rules and good practices which have been proven over time. Assuming you have a rudimentary knowledge of plumbing systems you may proceed with the following.
You may connect to your horizontal toilet waste pipe but should be 3-5 pipe diameters downstream any vertical portion (like where it turns up to the toilet, or turns to go up a wall for an upstairs toilet.) If you do connect to a horizontal portion the new pipe must be sized to serve as both a drain (for the new fixture) and as a vent (for both the new fixture and the toilet.) this means that the new drain must connect back into the vent system (at least 6" higher than the rim of the highest fixture connecting to that system) OR must vent separately out the roof of the building or through an approved air admittance device. (basically an air valve in the cabinet or wall space that lets air into the system but not out. - -air valves have special provisions and are tricky so research them thoroughly before installing one.)
You may also connect to a vertical stack. (a large pipe serving fixtures on the floor above) When connecting to a stack you need only size the new pipe to serve as a drain and vent for the new fixture. Generally you may connect to any portion of the vertical stack (high or low) as long as you use a wye branch fitting or other approved drainage pattern fitting. hope this helps.
No, it has to be vented
Any vent is usually the size of the drain or waste pipe it is connected to. 3 or 4 inch on a toilet.
The laundry waste pipe is fitted to the main drain near the toilet and the main pipe down the line past toilet is partly plugged, forcing the laundry waste up the toilet waste tube. You need to auger the pipe from toilet to outside. If all the piping is in ground you will have to remove toilet from floor to do this properly.
In a medical setting, sink waste pipes should not be directly connected to toilet waste pipes due to the risk of contamination and the potential for biohazard exposure. Proper plumbing design requires separate drainage systems for sinks and toilets to maintain hygiene and prevent backflow of pathogens. Additionally, local plumbing codes often mandate such separation to ensure safety and compliance with health regulations. Therefore, maintaining distinct waste disposal systems is essential for infection control and patient safety.
A typical residential bathroom plumbing diagram shows the toilet connected to a waste pipe that leads to the sewer system. The sink is connected to a separate drain pipe that also leads to the sewer. Both the toilet and sink have water supply lines that connect to the main water supply for flushing and washing.
No, Saddles are illegal in most civilized countries
The purpose of the water pipe in a toilet system is to supply water to the toilet tank, which is necessary for flushing waste down the drain.
It's connected to the incoming cold water supply pipe.
You CAN'T have a p-trap under the toilet! The p-trap is built into the toilet!
A detailed toilet drain diagram shows how waste from the toilet flows through the plumbing system. It typically includes the toilet bowl, trap, waste pipe, vent pipe, and main sewer line. The waste is flushed down the toilet bowl, goes through the trap to prevent sewer gases from entering the home, then flows through the waste pipe to the main sewer line. The vent pipe allows air to enter the system, preventing suction and ensuring proper drainage. This diagram helps understand how the plumbing system works to remove waste from the toilet effectively.
The easiest solution would be to move the toilet so that it lines up with the waste pipe.
Depends on the design, but I suspect you set the seat height to the correct position and work from that, not use the waste as a height guide.