Click to expand Tap to zoom Air Lift Drain Cock - 1/4in Npt by Air Lift MFG Part Number: 21754 Original price $4.08 - Original price $4.08 Original price $4.08 $4.08 - $4.08 Current price $4.08 | / Every tank needs one of these in order to keep the moisture out. 1/4 in. MNPT.Warranty Quantity Add to cart