The Irrigation Plug is used when you want to close up the hole at the bottom of a pot and stop water/nutrient solution from draining from it. For an optimal seal, apply silicone around the edges of the Plug Want to print this part? Search today's top 3D-printing services and materials to find the cheapest price for your project. Go to https://www.3Dprintler.comThe Irrigation Plug is used when you want to close up the hole at the bottom of a pot and stop water/nutrient solution from draining from it. For an optimal seal, apply silicone around the edges of the Plug.