| Business | Phone |
| A & P Plumbing & Heating 1056 Waverly Ave, Holtsville 11742 | (631) 289-3108 |
| Master Mechanical Corp Holtsville 11742 | (631) 846-3000 |
| Nicj Plumbing & Heating 112 Summerfield Dr, Holtsville 11742 | (631) 447-8321 |
| Gary Curley Plumbing & Htg Inc 34 Barretts Ave # 8, Holtsville 11742 | (631) 207-3937 |