| Business | Phone |
| Bay Bell Plumbing & Heating 64 Dale Ave, Riverhead 11901 | (631) 728-4411 |
| Bertsand Plumbing & Htg Inc Osborne Ave, Riverhead 11901 | (631) 208-8400 |
| C Nappe Plumbing & Heating 179 Trout Brook Ln, Riverhead 11901 | (631) 722-5054 |
| Christopher Nappe Plumbing 118 Marcy Ave, Riverhead 11901 | (631) 727-4096 |
| Christopher Nappe Plumbing 179 Trout Brook Ln, Riverhead 11901 | (631) 722-4890 |
| East West Plumbing & Heating 690 Middle Rd, Riverhead 11901 | (631) 727-6253 |
| East Wind Plumbing & Heating 690 Middle Rd, Riverhead 11901 | (631) 283-4997 |
| David L Fulton 1159 W Main St # B, Riverhead 11901 | (631) 727-7854 |
| Hi-Tech Plumbing Enterprise 700 Main Rd, Riverhead 11901 | (631) 722-9616 |
| Rescomm Plumbing & Heating 5925 Sound Ave, Riverhead 11901 | (631) 288-1079 |
| Rescomm Plumbing & Heating 825 Herricks Ln, Riverhead 11901 | (631) 722-2200 |
| Kevin Murphy Plumbing & Htg 284 Royal Ave, Riverhead 11901 | (631) 289-0138 |
| Kma Plumbing 6 Adelia Path, Riverhead 11901 | (631) 722-7885 |
| Roto-Rooter Plumbing & Drain Riverhead 11901 | (631) 208-8451 |
| V V Plumbing & Heating 459 Brookhaven Ave, Riverhead 11901 | (631) 727-0057 |
| Windriver Environmental Riverhead 11901 | (631) 727-5435 |