Pressure washer apparatus

A pressure washer apparatus comprising:

• a connection for a liquid source;
• a high-pressure pump;
• a main line through which, via said high-pressure pump, liquid can be conveyed from said connection to a spray opening of said main line;
• a main line valve arranged in said main line;
• a handheld sprayer, wherein said spray opening is arranged on said handheld sprayer;
• a lever arranged on said handheld sprayer;
• said main line valve being configured, when in a closed state, to prevent liquid from flowing through said main line;
• said main line valve being configured, when in an open state, to allow liquid to flow through said main line;
• said main line valve being switchable between said open state and said closed state via said lever;
• said main line having a suction chamber between said connection and said high-pressure pump;
• said main line having a pressure chamber between said high-pressure pump and said spray opening;
• said pressure chamber being fluidically connected to said suction chamber via a bypass line;
• a bypass valve arranged in said bypass line;
• said bypass line defining a free cross-sectional area settable via said bypass valve for regulating a pressure in said pressure chamber;
• and,
• said bypass valve being adjustable via said lever for setting said free cross-sectional area of said bypass line.