Quiet Operation Monsoon Standard Twin 3.0 Bar 46416 Positive Head Shower Pump. Monsoon from Stuart Turner offers a comprehensive range of premium quality brass pumps. Capable of boosting water pressure for a host of domestic & light commercial applications from a single tap or shower, to a complete bathroom or the whole property. Monsoon Standard 3.0 bar Twin Pump is designed for installation into vented systems to pump both hot & cold water supplies, boosting both equally to an individual shower, complete bathroom, or whole house. Suitable for positive head applications only.