Advantage L.I., a premier swimming pool contractor located in Port Jefferson, NY, is dedicated to Our service is your advantage. With leveraging top products like Hayward and Jandy to deliver exceptional pool heat pumps, liners, and more. We offer services like renovations, marble dusting, pool safety covers, and weekly maintenance to ensure your pool remains pristine. As certified swimming pool installers and technicians, we pride ourselves on quality and customer satisfaction, underscored by our BBB accreditation. New customers enjoy a 10% discount and free opening services with a liner or pool heater purchase. We provide free estimates to turn your vision into reality. Visit our website or call to book today!