| 摘要 |
A water storage tank for water purifying system is disclosed. It mainly includes a solid housing and at least one air bag. The solid housing has a liquid storing space for storing liquid. The air bag being positioned in the liquid storing space and the air bag is movable inside. This air bag will expand or shrink depending upon the pressure in the liquid storing space. So, this invention can be modified from an existing storage tank. There is no water leakage problem causing by the membrane of the storage tank. In addition, it is easy to replace the air bag. In addition, the overall cost is extremely low.
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