1/2" NPT Hex Nut

thingiverse

When crafting rain barrels, I encountered leakage issues around 1/2-inch NPT fittings (despite being threaded and sealed) as temperatures rose with sun exposure. I concluded that the thin walls of the barrels were insufficient to maintain a tight seal. To resolve this problem, I came up with a solution: designing custom parts in Nylon, printing them, and attaching them internally over the fittings before applying flexible sealant around their edges. As a result, no further leaks occurred.