Hinged waterbox cover

A waterbox hinge assembly retrofitting kit, comprising:

• a waterbox hinge assembly, comprising:
• a cover mount that is securable to a waterbox cover of a heating, ventilation, and air conditioning (HVAC) unit;
• a hinge assembly, comprising:
• an upper hinge member;
• a lower hinge member;
• a center hinge member disposed between the upper and lower hinge members;
• and
• a hinge pin;
• and
• a hinge-mounting bracket that is securable to the HVAC unit,
• wherein in an installed configuration,
• the center hinge member is fixed to one of the cover mount or the hinge-mounting bracket;
• the upper and lower hinge members are fixed to the other of the hinge-mounting bracket or the cover mount;
• and
• the hinge pin is inserted into the upper and lower hinge members and the center hinge member, and
• wherein the waterbox hinge assembly is adjustable in a plurality of directions.