It's called a CLEANOUT, and your sewer line is clogged.
The drain from the toilet to the main drain is plugged and the branch to the shower is not. If the main floor toilet flushes, it is between the two toilets and not between the house and the sewer.
Grey is usually dirty water but not toilet water (shower, sink drain) Black (or Brown) is sewage from the toilet. If you have a motorhome there will be two sewage tanks... "grey" and "black"
That depends on how your sewage is treated, it could go into a septic tank in your garden or it could go into the public sewer and on to a sewage treatment works (sewage farm). In both cases raw sewage is prevented from discharge directly into the environment and the sewage is retained until natural processes have converted it into water that is safe to discharge.
Most of the one's I have run across do not have an overflow. Mainly used for disposal, dumping out drinks, etc, not for washing so overflow not really an issue. Also, most are stainless which do not lend themselves to an overflow drain.
Usually. Going through the overflow drain gets you straight into the drain without having to make the sharp bend in the tub drain. There could be a trap that comes apart in the drain underneath if it is accessible.
The purpose of an overflow pipe in a toilet is to prevent the toilet bowl from overflowing by providing a secondary pathway for excess water to drain out if the main drain gets blocked.
When the washing machine drains, it can cause the toilet to overflow because both appliances may share the same drain line. If the drain line becomes clogged or blocked, the water from the washing machine can back up into the toilet, leading to an overflow.
The purpose of the toilet overflow tube is to prevent water from overflowing in the toilet bowl by providing a pathway for excess water to flow into the toilet's drain pipe. When the water level in the tank rises too high, the overflow tube directs the excess water into the drain pipe, preventing it from spilling over the edge of the bowl.
A toilet overflows when there is a blockage in the drain pipe, excessive flushing of toilet paper or foreign objects, or a malfunction in the toilet's internal mechanisms.
The drain from the toilet to the main drain is plugged and the branch to the shower is not. If the main floor toilet flushes, it is between the two toilets and not between the house and the sewer.
Grey is usually dirty water but not toilet water (shower, sink drain) Black (or Brown) is sewage from the toilet. If you have a motorhome there will be two sewage tanks... "grey" and "black"
Clogged drain or toilet. Also check the vent holes under the rim and clean the out.
A frost proof toilet the trap is located below the frost line
To prevent water overflow in your toilet, you can adjust the water level in the tank by adjusting the float or flapper mechanism. You can also check for any clogs in the toilet bowl or drain pipe and make sure the fill valve is working properly. Regular maintenance and prompt repairs can help prevent water overflow issues.
A down line clog would cause this. The shower drain is lower than any other drain in the bathroom so it is the first to tell you of a clog in the line. Time to Roto Rooter! Y-THINK-Y The toilet and shower must have the same drain. There is a blockage somewhere after the toilet and shower drains meet. The backup takes the easiest route back which must be the shower drain. Try snaking out both drains. Start with the toilet. To do the best job, remove the toilet and start from floor level.
Common causes of overflow in a bathroom sink with overflow include a clogged drain, a faulty stopper or drain plug, or a malfunctioning overflow drain system.
To determine if your tub is leaking from the overflow drain, fill the tub with water and observe if the water level rises above the overflow drain. If water is leaking from the overflow drain while the tub is filled, then it is likely that the tub is leaking from the overflow drain.