Solar collector without pressure
The unpressurized external tank solar collectors are solar collector systems in which the heat carrier fluid is low or neutral pressure, and the system does not require special pressure boosting or pressure control devices. These systems are generally easier to install and operate, and are often used to produce domestic hot water or for applications with less heat demand.
These tanks cannot be connected directly to the network, only with the optional Jakab valve. You can also circulate the pool water directly in it or heat it for industrial purposes. It can also be used for bathing, but the faucet must be installed in front of the tank.
It is not as convenient to use as the ones with pressure-resistant tanks, but it can be perfect for a weekend house.