Dover Vinyl Products has been manufacturing vinyl liners in the USA since 1971 and is a family owned and operated business. All operations are overseen to ensure quality control and provide each customer with the highest level of service in the pool industry. Quality, fit and customer service are the cornerstones that our business is built. All liners are custom cut by our advanced computerized cutting machines to ensure a perfect fit and come with pro-rated warranties. All liners are backed by a 20 year-2 year full pro-rated warranty for 20 mil and a 27 year-2 year full pro-rated warranty for 25 mil liners. We have an excellent pattern selection with many exclusive patterns not available from other liner manufacturers. All liners are made from top quality vinyl that is formulated with built-in sanitizing agents that inhibit the growth of algae and mildew and UV inhibitors to help prevent damage from UV rays. Our skilled draftsmen use a state-of-the-art CAD system with the ability to handle the most difficult and complex designs to create a liner that fits.