When I bought the 100 Gallon Rubbermaid Stock Tank for my aquaponics system, I decided to remove the drain plug and install a valve instead. This will allow me to attach a garden hose to the tank and drain it out the door of the quail house easily if necessary.
Of course the threads for the drain valve were much larger than a standard garden hose fitting, so I needed a reducer. I searched around online and had a hard time figuring out what size thread the drain plug was. So I just took the bulkhead out and brought it to a hardware store and found what fit.
Get a 1 1/4″ x 3/4″ reducer. That will fit into the bulkhead where the drain plug was. Then you can simply screw in a valve of your choice. I chose a boiler valve since it’s short and won’t stick out too far where I’d trip over it.
Here’s how to install it.