A pump liquid chamber (9) is formed inside a pump bellows (7). A suction port (18) and a discharge port (19) are formed in a wall face (4a) facing the liquid chamber (9). The suction port (18) communicates with a pump inflow passage (5), and the discharge port (19) communicates with a pump outflow passage (6). A suction check valve (20) is disposed in the suction port (18). An accumulator liquid chamber (31) is formed inside an accumulator bellows (29). An inflow port (23) and an outflow port (24) are formed in a wall face (28a) facing the liquid chamber (31). The inflow port (23) communicates with an accumulator inflow passage (33), and the outflow port (24) communicates with an accumulator outflow passage (34). The accumulator inflow passage (33) is connected to the downstream of the pump outflow passage (6). A discharge check valve (21) of the pump (P) is disposed in the accumulator inflow passage (33) in an accumulator body (25).

 
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