Advantage L.I.
- Openings & closings
- Heaters & heat pumps
- Leak detection
- New pool construction
Towns: Holbrook, Port Jefferson Station, Coram, Farmingville, Miller Place +4 more
12 companies offering leak detection, each with a Nassau or Suffolk County license we checked on Sep 24, 2026.
Losing more water than evaporation explains usually means a leak in the shell, liner, plumbing or equipment. Leak specialists use pressure testing, dye testing and sometimes divers to pinpoint the source before repair.
Towns: Holbrook, Port Jefferson Station, Coram, Farmingville, Miller Place +4 more
Towns: Dix Hills, Roslyn, Hewlett, Woodmere, Kings Point +5 more
Towns: Amityville, Westbury, Baldwin, Miller Place, South Setauket
Pool openingfrom $285 + tax
Towns: West Babylon
Towns: Glen Cove, North Shore
Towns: Commack
Towns: Bay Shore, West Islip, Babylon, Lindenhurst, Deer Park +6 more
Towns: Oceanside, Freeport, Merrick, Bellmore, Wantagh +15 more
Towns: Miller Place, Shoreham, Wading River, East Northport, Dix Hills +6 more
Towns: Bayville, Oyster Bay, Mill Neck, Locust Valley, Glen Cove +15 more
Towns: Hamptons, Deer Park, East Islip, Speonk, Riverhead
Also confirm the county license is current before you sign. Every company above shows its license number and the date we checked it.