YZMtube Fittings Bulkhead Connector 3/8" Tube Quick connect RO Water Filter Pack of 4 (Bulkhead Connector 3/8)

It was just what I needed. I used a plastic gallon bucket, a length of 3/8 inch OD plastic tubing, a plastic carboy, and the connector, and created an automatic Christmas tree waterer. It works perfectly. Almost a week between fill-ups.