Bin & Container Drain

I needed a drain for my 17gal hydroponics container. I couldn't find one available. The model is designed around rubber hose washers I had lying around. Washers can be purchased from Amazon or your local hardware store. https://www.amazon.com/Gilmour-Rubber-Hose-Washers-Package/dp/B000NCWP44/ref=sr_1_1?ie=UTF8&qid=1466976962&sr=8-1&keywords=hose+gasket
For inside the cap I cut a piece of bicycle inner tube.

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/kDCPWIahfRi