John, The check valves are a one time use. Once they are installed into the tailpiece they cannot be removed without damaging them. I am sorry to hear you forgot the 0-ring. The only option would be to pull the check valves out and replace them. They will not come out to be reinstalled.
John, The check valves are a one time use. Once they are installed into the tailpiece they cannot be removed without damaging them. I am sorry to hear you forgot the 0-ring. The only option would be to pull the check valves out and replace them. They will not come out to be reinstalled.