The barrel pumps and barrel taps listed here can be used to drain or pump low and high viscosity liquids from standard barrels. The barrel pumps are thus installed directly on the barrel thread (2" fine thread, 2" Mauser coarse threads or 2" Tri-Sure coarse threads) of the existing barrel and pump the liquid out of the barrel, either manually or electrically. Drain cocks with G 3/4" female thread can be screwed on to the horizontal barrel using a barrel adapter and enable pressureless draining of the barrel contents. Tip: The self-closing barrel taps, which reliably prevent accidental running empty are especially practical.