1inch Top Hat Grommet
If you have purchased or are using your own large tank and do not have access to insert a 3/4″ water barrel tap you can use a 1″ Top Hat Grommet. A 1″ hole is drilled at the bottom of the tank and the 1″ Top Hat Grommet is inserted into the hole. 3/4″ pipe is then pushed into the grommet. This will form a water tight connection.