| Business | Phone |
| Ace Plumbing & Heating 36 Gun Club Rd, Northport 11768 | (631) 261-7339 |
| Al Kiswra Jr Plumbing & Htg 16 Hillside Ave, Northport 11768 | (631) 757-3823 |
| Bob's Plumbing & Heating 36 Grand Ave, Northport 11768 | (631) 261-7412 |
| C & B Gas Burner Svc & Inst 148 Sandy Hollow Rd, Northport 11768 | (631) 757-4788 |
| Mc Gowam Plumbing & Heating Northport 11768 | (631) 261-2687 |
| Eddie's Plumbing Svc 207 Laurel Ave, Northport 11768 | (631) 754-2444 |
| Engelmann Energy 345 Fort Salonga Rd, Northport 11768 | (631) 754-2222 |
| Five Star Plumbing & Heating 54 Hastings Dr, Northport 11768 | (631) 754-4161 |
| Roto-Rooter Plumbing & Drain Northport 11768 | (631) 754-0162 |