Patent ID: 7896021

Claim:
A check valve system, comprising: a first adapter having a side wall with external threads, a central opening and an upstanding member defining a valve seat; a second adapter having a body with a side wall and a top wall bordering a central opening, the top wall having an opening defined therein in communication with the central opening, the side wall having an opening defined therein in communication with the central opening, the second adapter sized to fit over the first adapter such that the upstanding member on the first adapter is received in the central opening of the second adapter; a check valve sized to fit through the opening in the side wall of the second adapter, the check valve having a first end, a second end, and a central passageway, the check valve sized to fit inside the body of the second adapter between the valve seat and the top wall of the second adapter; and, a collar having a central opening capable of receiving the body of the second adapter there through, the collar having internal threads capable of engaging with the threads on the side wall of the first adapter to move the top wall of the second adapter toward the valve seat to secure the check valve in position.