Filtering device and gas water heater

The utility model relates to a filtering device which comprises a base and a cleaning bolt detachably connected to the base. The base comprises a water inlet connector, a filtering cavity and a water outlet connector which are sequentially connected. The filtering cavity is provided with an insertion opening. The open end of the socket is provided with a movable clamping groove, a notch and a limiting groove. The cleaning bolt comprises a bolt arranged on the inserting opening in a penetrating mode, a sealing ring connected to the bolt in a sleeving mode and a filter screen connected to the bolt. And clamping blocks protruding outwards are arranged on the peripheral side of the bolt. Meanwhile, the utility model further provides the gas water heater. The filter device has the beneficial effects that the filter screen is integrated on the detachable cleaning bolt, so that the whole filter device is prevented from being detached when the filter screen is cleaned and maintained. Moreover, the cleaning bolt is as