About Us Dunrite has been an industry leader in the swimming pool business since 1968. Serving Nassau and Suffolk Counties, Dunrite is one of the top builders of inground, semi inground, and aboveground vinyl lined swimming pools on Long Island. Dunrite's retail stores feature one of the largest parts departments on Long Island stocking parts from many swimming pool manufacturers. Dunrite's sales associates are knowledgeable and ready to assist you with any questions concerning water chemistry or your pools filtration system. Dunrite's service department specializes in swimming pool summerization and winterization as well as other swimming pool service needs.