To day in most parts of the world it would not be allowed, however, many strange things have happened in the past!
I can't say it is dangerous, but you should never have one under house. You should have one cleaned every 5 years and they can only clean from the top of the tank.
No
Unplug the pipe between house and septic tank first. Get flow of septic into the tank.
It is connected through the main house drain to septic tank.
The septic tank is full and needs to be pumped out.
The size of the particular septic tank you'll need depends upon the amount of bedrooms in your house, number of individuals living presently there, the particular properties rectangular footage as well as whether or not water protecting fixtures are used. You can get around 500 to 2500 gallons check on TGwWasteWater
Yes, if your house has a septic tank water from the sink and bath will eventually goes to the septic tank. However if your house is equipped with a fully dual grey water/black water sewage system, water from the sink and bath will first go to the grey water storage tank, the toilet will fill its tank from the grey water storage tank then flush through the black water pipes to the septic tank.
A few things can make this dangerous: 1. The tank could possibly back up, causing a lot of... stuff to drain back under your home. 2. It could be hard to access for maintainance. 3. It could blow under pressure causing damage to various pipes and gas lines. Overall, it is a better idea to move a septic tank away from the house.
In most localities this is not allowed. However, a sealed holding tank, which can be pumped to a septic system might be allowed, check with your plumbing inspector.
A septic tank needs to be pumped when full or before a big get together at your house. Also you need to clean up the septic from back up. Using things sucks as Rid X can help you as well.
If by the word 'cesspit' you mean a septic system, then the pipe is plugged between the house and the primary tank. You must have a 'cleanout' in the wall somewhere above where the main drain goes outside. Find this and snake it, - or get a septic pumping company to pump out your tank and then snake the pipe from the tank end while it is empty.
it upon the material used to build the septic tank
An overfilled septic tank can cause backups in a sewer line, causing many problems in a plumbing system. If a septic tank has overflowed, it is usually clogged with excessive organic debris. A septic tank cleaner can be a good first step when treating a septic tank overflow. Septic tank cleaners contain natural bacteria and enzymes, designed to break down organic material in human waste. Excessive disposal of bleach and detergents into a septic line can kill these bacteria, preventing the breakdown of septic waste in a tank. If a septic cleaner doesn't clear a tank after a week, it may be necessary to use a professional septic tank cleaning service.