Abstract: A pressure vessel at least includes a main vessel, an air entry valve, a water entry valve, a drain valve and a control valve. The drain valve is provided with a valve base set on the top of the main vessel, a piston unit inserted inside the valve base able to be moved upwards and a spring installed between the piston member and the valve base. In addition, the pressured water in the main vessel coming from the water entry valve and the air entry valve can be stored in the control valve and guided to a chamber between the piston unit and the valve base, enabling the piston member to surpasses the elasticity and the water pressure to move up to separate from a drain exit of the main vessel for flushing a toilet. Therefore, the present invention has a simple structure, easy to assemble, preventing accidental flushing.

Abstract: A vacuum breaking device includes a housing, a sealing base, a floating cup and a sealing ring. The housing has a liquid inlet, a liquid outlet and an air passageway. The sealing base is installed in the air passageway, and the floating cup is installed in an inner chamber of the sealing base. The sealing ring is fitted around an upper end of the floating cup for properly sealing the outer-air inlet in the upper portion of the sealing base and communicating with the inner chamber. The floating cup has an annular flange for increasing the buoyancy of the floating cup, so that the outer-air inlet may be quickly sealed up. The annular flange has plural air paths, so the vacuum condition may be broken immediately when a vacuum pressure is produced in the device.

Abstract: A shower head includes a main body formed with a chamber communicating with a water inlet at the upper end. The main body has its lower end formed with central water outlets and peripheral water outlets and has its interior installed with a water-separating unit with a pivot having a sealing member fixed thereon. When the pivot together with the sealing member is moved up and down vertically in the chamber, the sealing member can carry out sealing to control the water flowing in the chamber through the central water outlets or the peripheral water outlets. The main body has one circumferential side installed with a press unit formed with two pushing slopes actuated to move horizontally and push the pivot of the water-separating unit to shift up and down vertically for controlling the shower head to send out water through the center or the periphery.