Penstocks, in their basic form, are permanent water gates that control the flow of water from one area to the next, which can be manually adjusted depending on the desired flow. Used on Waterways, Power Plants, Industrial Effluent Plants, Hydro Power, Sewerage/Wastewater Treatment Plants, Drainage and Flood Control. For more information on Fernco Penstocks visit our website in the link below: https://www.fernco.co.uk/product/pens...