No. 13 in detailed image drawing.
this item connects M-90601 2 inch tank valve to M-8800799 quick connect
replacement o-rings are part number M-8801962
Made in USA by Paul Mueller Co
M-8800799 Old Style Quick Connect
M-8800742 Adapter connects to Mueller M-8823113 -3 inch milk tank valve
M-8800743 Adapter connects to Mueller M-90601 -2 inch milk tank valve