Praher's unique spanner wrench handle provides for easy valve seat servicing - just pull handle off ball stem & use as a tool. Praher's unique threaded true single union ball valve design provides for : user friendly handle operation - union nut load does not transfer onto ball seat, thereby providing user with easy handle operation even if valve not operated for a long period of time; below grade - blocked seat flooded suction design - valve seat will not blow out from the static pressure if union nut removed.