Upper tank volume
The volume of the upper tank provided in the toilet.
The upper tank is used for flushing: water is poured into it, and in peat models (see "Operating principle"), peat is poured. The larger such a tank, the longer it will last and the less often you have to refill the toilet. At the same time, too much volume would have a corresponding effect on the dimensions and weight of the toilet. Therefore, most models use tanks with a capacity of about 10 – 15 liters: this is considered the best compromise between capacity and compactness. Less capacious upper tanks are also produced, but more capacious ones are almost never found.
Volume of the lower tank
The volume of the lower tank provided in the toilet.
The lower tank is intended for direct collection of waste. The larger it is, the less often you will have to clean the toilet from the accumulated contents. On the other hand, a large volume has a corresponding effect on the dimensions and weight of the entire structure. Therefore, manufacturers select the capacity of the lower tank in accordance with the type (see the relevant paragraph) and the intended features of the use of the dry closet. So, in mobile models, this figure rarely exceeds 20 liters, and in stationary models, tanks of 70, 120 and even 200 liters can be installed.
Seat height
The height of the toilet seat relative to ground level. With a low seat height (
less than 40 cm), an additional stand may be required for comfortable use; on the other hand, such models are as compact as possible.
