Liquid supply device for a motor vehicle

A liquid supply device for a motor vehicle, comprising:

• a supply pump intended for pumping liquid from a liquid tank to a liquid consumption device, and
• a filtration assembly intended for filtering the liquid pumped by the supply pump, the filtration assembly comprising a housing in which a filtration member is housed,
• wherein the housing forms a siphon connected to a suction inlet of the supply pump and comprises an open end intended to open into the liquid contained in the liquid tank such that a path of this liquid in the siphon passes through a so-called high level, which, when the level of the liquid in the liquid tank is below a predetermined threshold, is higher than the level of the liquid in the liquid tank,
• wherein the filtration member comprises a filtration zone in the form of a pocket of filtration material extending vertically into the housing forming the siphon.