Althon Medium Duty Penstocks can be used in Surface, Sewer and Water Process applications. They are a Simple and Highly Effective way to Prevent Water Backflow into a system. Medium Duty Penstocks have been developed for the majority of situations where a Penstock is required. Althon Medium Duty Penstocks are suitable for sealing pressures of 5MwC as standard. These Penstocks require Virtually No Maintenance, allow Fast, Safe and Easy installation. These Products are generally Available from Stock.