One-piece toilet with flush valve

A flush valve for use with a toilet having an integral one piece tank and bowl, the flush valve comprising:

• a valve body comprising:
• an inner wall extending between a first end, which is configured to be in fluid communication with a first internal compartment of the integral one piece tank and bowl, and a second end, which is configured to be in fluid communication with a second internal compartment of the integral one piece tank and bowl, and
• a locking flange including a reference tab having a first shape and a standard tab having a second shape, the locking flange extending radially outward from the inner wall and being configured be retained between a retaining structure including a first wall and a second wall of the integral one piece tank and bowl in a locking position of the valve body,
• wherein one of the first and second walls is configured to separate the first and second internal compartments;
• and
• a seal disposed between the locking flange and of the valve body and one of the first and second walls of the integral one piece tank and bowl.

A toilet, comprising:

• an integral, one piece structure comprising:
• a base having a bowl and a fluid channel;
• a tank having an internal compartment configured to hold water;
• a wall disposed between a lower portion of the tank and an upper portion of the base;
• and
• a retaining structure;
• a flush valve comprising a valve body comprising:
• an inner wall extending between a first end and a second end, and
• a locking flange including a reference tab having a first shape and a standard tab having a second shape, wherein the locking flange is configured to be retained between the retaining structure including a first wall and a second wall of the tank and bowl in a locking position of the valve body.