Those sets of equipments have some excellent designs, such as: U type continuous reaction tank and water-seal tank etc. , which increase efficiency and quality.

Also, if you go away from your house for awhile in the spring to fall, then you should fill up the tank before you leave. It will slowly evaporate through the loop seal.

A toilet tank is dripping, and you can't tell if the water is coming from harmless seasonal sweating or a bad seal.