Grease interceptor latching and riser system and method of use thereof

A method of installing, in combination, a latch assembly, a cover, a grease interceptor with upwardly extending walls, and an extension of said grease interceptor walls, comprising the steps of:

• a) positioning said grease interceptor as required to hydraulically connect said grease interceptor to a wastewater line;
• b) determining a grade difference between a top of said grease interceptor and a finished floor grade;
• and
• c) adding a collar extension to said grease interceptor sized to permit said top of said grease interceptor to match said finished floor grade, wherein said collar extension is comprised of at least two parts joined together and further comprising a sealing compound disposed between said at least to parts such that the two parts are joined together to be watertight;
• wherein said extension is attached to a top edge of the upwardly extending walls of said grease interceptor, said extension having a wall for extending a height of said grease interceptor walls, and the latch assembly comprising:
• a catch member secured to said extension transverse to said wall of said extension at an upper end of said wall of said extension;
• and
• a latch member pivotally mounted to said cover adjacent an edge of said cover and positioned to register with said catch member;
• said latch member having a hook portion and a lever portion, wherein pivoting said lever portion when said cover is positioned on said extension causes said hook portion to engage and disengage with said catch member.

A latch assembly for releasably securing a cover onto an extension of a grease interceptor without the use of a tool, said extension being attached to a top edge of said grease interceptor in a watertight manner, said extension having a wall for extending a height of said grease interceptor, the latch assembly comprising:

• a catch member secured to said extension transverse to said wall of said extension at an upper end of said wall;
• a latch member pivotally mounted to said cover adjacent an edge of said cover and positioned to register with said catch member,
• said latch member having a hook portion and a lever portion, wherein pivoting said lever position when said cover is positioned on said extension causes said hook portion to engage and disengage with said catch member;
• wherein said extension comprises at least one collar extension, wherein said collar extension is comprised of at least two parts joined together and further comprising a sealing compound disposed between said at least two parts such that the two parts are joined together to be watertight.

A latch assembly for securing a cover onto an extension of a grease interceptor, said extension being attachable to a top edge of said grease interceptor in a watertight manner, said extension having a wall for extending a height of said grease interceptor, the latch assembly comprising:

• a catch member secured to said extension transverse to said wall of said extension at an upper end of said wall;
• a latch member pivotally mounted to said cover adjacent an edge of said cover and positioned to register with said catch member,
• said latch member having a hook portion and a lever portion, wherein pivoting said lever position when said cover is positioned on said extension causes said hook portion to engage and disengage with said catch member,
• wherein said extension comprises:
• a lower edge for engaging an upper edge of said grease interceptor;
• a middle portion forming an upward wall extension of said grease interceptor;
• and
• a top edge sized and shaped to engage said cover and allow said cover to be secured thereto;
• wherein said extension is comprised of at least two parts, each of said at least two parts being substantially identical and formed from molded plastic, and further comprising a sealing compound disposed between said at least two parts such that the two parts are joined together to be watertight.