24 Hour Plumbing & Sewer Inc. – Your Trusted Local Plumbers in Nassau County, NY 24 Hour Plumbing & Sewer Inc. is a family-owned and locally operated plumbing company proudly serving Oceanside, Long Beach, Island Park, Freeport, Baldwin, Merrick, Bellmore, and all of Nassau County, New York. For years, we’ve built our reputation as the most affordable, reliable, and honest 24-hour plumbing service on Long Island — available day or night, 7 days a week, 365 days a year. When plumbing emergencies strike, you need experts who respond fast and fix the problem right the first time. Our licensed and insured plumbers handle everything from clogged drains, water heater replacements, and sewer line repairs to boiler installations, leak detect.