Storage tank

A storage tank, comprising:

• a body including a top portion, a bottom portion opposite to said top portion, and a lateral wall portion interconnecting said top portion and said bottom portion;
• a stand detachably disposed on one of said top portion and said bottom portion of said body, said stand including a base and a plurality of supporting arms connected to said base, said stand having an opening formed on one of said plurality of supporting arms,
• wherein each of said plurality of supporting arms includes a supporting wall for abutting against one of said top portion and said bottom portion of said body, and a surrounding wall connected to a periphery of said supporting wall, said supporting wall cooperating with said surrounding wall to define an accommodating space, said opening being formed on said surrounding wall of the one of said plurality of supporting arms and being in spatial communication with the accommodating space;
• and
• a ball valve including a primary pipe, and a secondary pipe that is transversely connected to said primary pipe, said primary pipe being configured to be received in the accommodating space of the one of said plurality of supporting arms, said secondary pipe being configured to extend through said opening formed on the one of said plurality of supporting arms.