Brand new pump Box might be tatty Positive and negative head. 2.0bar. Premium quality brass twin pump designed for installation into vented systems to pump both hot and cold water supplies, boosting both equally to an individual shower, complete bathroom or whole house. Positive & Negative Head22mm Push-Fit Anti-Vibration Couplers5 Year Manufacturer's Guarantee (T&Cs Apply)Up to 1 Connectable ShowersSuitable for Gravity-Fed SystemsBuilt-In 22mm Isolating ValveContinuous RatingBrassQuiet OperationSystem-Friendly Peripheral Design