Dishwashing appliance and vent for dishwashing appliance

A dishwasher appliance, comprising:

• a cabinet defining a wash chamber for the receipt of articles for washing;
• a sump for collection of a fluid from the wash chamber, the sump comprising a base wall and a collar extending from the base wall, the collar comprising at least one sidewall, the at least one sidewall defining a main collar passage therein and comprising an inner thread, the collar further defining a collar access passage extending through the sidewall and in fluid communication with the main collar passage;
• a filter for filtering the fluid from the wash chamber, the filter defining an opening, the opening generally aligned with the main collar passage;
• a vent coupling the filter and the sump together, the vent comprising a shaft and a lip extending from the shaft, the shaft comprising at least one sideWall, the at least one sidewall defining a main shaft passage therein and comprising an outer thread engageable with the inner thread, the shaft further defining a shaft access passage extending through the sidewall and in fluid communication with the main shaft passage, the lip having a width greater than a width of the opening,
• wherein the shaft extends through the opening and the main collar passage and the collar access passage and the main shaft passage are in fluid communication.