The WLD1800 and WLD1800R Drainers contain a stainless steel float and hardened stainless steel seat and disc to drain out liquids from pressurized piplines, tanks, and vessels without the loss of the pressured gas. Available in either a repairable (WLD1800R) or a non-repairable (WLD1800) version. The all stainless steel construction allows them to be used in extremely corrosive environments.