| Business | Phone |
| Ambrosio & Co 2221 5th Ave # 6, Ronkonkoma 11779 | (631) 737-6796 |
| Lin-Mar & Son Inc 2088 Julia Goldbach Ave, Ronkonkoma 11779 | (631) 585-2778 |
| Certified Plumbing& Htg 55 Remington Blvd, Ronkonkoma 11779 | (631) 738-7232 |
| Chevalley & Wallace Plbg Inc 2127 Lakeland Ave # 3, Ronkonkoma 11779 | (631) 580-6095 |
| Mike Lake Plumbing & Heating 1044 Portion Rd, Ronkonkoma 11779 | (631) 732-6311 |
| Dix Hills Plumbing & Heating 856 Johnson Ave # 2, Ronkonkoma 11779 | (631) 981-3863 |
| North Island Plumbing & Htg Ronkonkoma 11779 | (631) 467-6208 |
| Fast Track Plumbing & Heating Ronkonkoma 11779 | (631) 737-4485 |
| Park Avenue Plumbing Corp 856 Johnson Ave # 2, Ronkonkoma 11779 | (631) 981-3800 |
| Hartcorn Plumbing & Heating 850 S 2nd St, Ronkonkoma 11779 | (631) 580-2300 |
| Plumb Co Llc 1863 Pond Rd, Ronkonkoma 11779 | (631) 981-7100 |
| Progressive Plumbing & Heating 16 Croydon Ave, Ronkonkoma 11779 | (631) 698-0468 |
| Ray The Plumber 297 Port Ave, Ronkonkoma 11779 | (631) 581-2500 |
| Joseph Bruno & Plumbing & Heat 100 Breeze Ave, Ronkonkoma 11779 | (631) 737-6263 |
| Just Plumbing Corp 60 Remington Blvd, Ronkonkoma 11779 | (631) 580-4300 |
| Ronkonkoma Plumbing & Heating 2858 Pine Ave, Ronkonkoma 11779 | (631) 588-8272 |
| Roto-Rooter Plumbing & Drain Ronkonkoma 11779 | (631) 585-1155 |
| Lakeland Plumbing & Heating 231 Peconic St, Ronkonkoma 11779 | (631) 588-3079 |
| Lange Plumbing & Heating 2140 Pond Rd, Ronkonkoma 11779 | (631) 737-0991 |
| Srm Plumbing & Heating Inc 2460 Ocean Ave, Ronkonkoma 11779 | (631) 585-4141 |