| Business | Phone |
| Collins Plumbing & Heating 10322 W Hyatt Rd, Ijamsville 21754 | (301) 831-9917 |
| Harren's Plumbing 2309 Oak Dr, Ijamsville 21754 | (301) 831-8557 |
| Micon Inc 10087 Tyler Pl, Ijamsville 21754 | (301) 607-4517 |
| Tyler Mechanical Contracting 10087 Tyler Pl, Ijamsville 21754 | (301) 831-8696 |