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 3/4″ Top Hat Grommet. A 23mm hole is drilled at the bottom of the tank and the 3/4″ Top Hat Grommet is inserted into the hole. 3/4″ pipe (hosepipe) is then pushed into the grommet. This will form a water tight connection.

ID – 3/4″ or 19.05mm
OD – 7/8″ or 22.23mm

Please note that this product is sold individually