Replace your RV 1/2" water heater drain plug quickly and easily with this convenient 2-pack. Drain plug has standard 1/2-14 NPT pipe threads. Use 3-5 wraps of Teflon tape to seal threads to prevent leaking. Replace your 1/2" water heater drain plug quickly and easily Fits various RV Water Heaters makes and models 1/2-14 NPT pipe threads Package of 2 Install using a 7/8" wrench or Camco’s 11633 Water Heater Wrench