French Drain Masters of Long Island 1900 Ocean Ave Ronkonkoma, NY 11779, United States 631-490-7979 http://frenchdrainlongisland.com/ French Drain Masters isn’t just a name we go by; it’s who we are. Since 1999, we have assisted many satisfied customers in residential, commercial, and governmental settings in providing reliable French drain installation, basement waterproofing, yard drainage installation, and sump pump installation on Long Island, including both Nassau and Suffolk Counties. read full review »