| Business | Phone |
| Community Plumbing & Heating 2575 Irving St Ne, Washington 20018 | (202) 269-3949 |
| Complete Plumbing & Heating 1445 Howard Rd Se, Washington 20020 | (202) 678-3263 |
| Demeter Software Technologies 1115 Massachusetts Ave Nw, Washington 20005 | (202) 842-9244 |
| F D Grayton Plumbing 15 O St Sw, Washington 20024 | (202) 544-4366 |
| Fanatic Plumbing & Drain 4238 Gault Pl Ne, Washington 20019 | (202) 388-1211 |
| First Time Plumbing & Heating 4010 3rd St Nw, Washington 20011 | (202) 726-8277 |
| Flood Inc Plumbing & Heating 711 Kennedy St Nw, Washington 20011 | (202) 269-0444 |
| Foote's Plumbing 2800 Sherman Ave Nw, Washington 20001 | (202) 238-0720 |
| George D Weitzel Inc 2122 Martin L King Jr Ave Se, Washington 20020 | (202) 678-2213 |
| Glover Contracting Svc 38 Underwood Pl Nw, Washington 20012 | (202) 291-0532 |
| H D Johnson Inc 5500 Macarthur Blvd Nw, Washington 20016 | (202) 244-6555 |
| Higgins Consolidated Endeavors 101 G St Sw # H, Washington 20024 | (202) 554-5418 |
| Inner-City Plumbing & Htg Co 2501 Elvans Rd Se, Washington 20020 | (202) 678-4696 |
| J R Zimmerman Plumbing & Htg 5142 Macarthur Blvd Nw, Washington 20016 | (202) 966-7778 |
| Jag Co 848 51st St Se, Washington 20019 | (202) 575-2141 |
| Joe Kelly Plumbing 1600 Newton St Ne, Washington 20018 | (202) 529-8231 |
| John C Flood Inc 711 Kennedy St Nw, Washington 20011 | (202) 291-3340 |
| John E Barry Plumbing & Htg 1209 10th St Nw, Washington 20001 | (202) 842-2424 |
| John E Barry Plumbing & Htg 1244 Columbia Rd Nw, Washington 20009 | (202) 546-2675 |
| M Miller Plumbing & Heating 1321 Constitution Ave Ne, Washington 20002 | (202) 546-0464 |
| M Miller Plumbing & Heating 1323 Linden Ct Ne, Washington 20002 | (202) 388-6410 |
| Magnolia Plumbing 600 Gallatin St Ne, Washington 20017 | (202) 829-8510 |
| Home Owners Plumbing 8451 Hilltop Rd # L, Washington 20005 | (202) 638-5113 |
| Narh Mechanical 1818 New York Ave Ne # 210b, Washington 20002 | (202) 832-3420 |
| Palisades Plumbing 1730 K St Nw, Washington 20006 | (202) 204-2212 |
| Plumbing Manufactures Inst 1825 I St Nw, Washington 20006 | (202) 429-2038 |
| Plumbline Plumbers 1629 A St Ne, Washington 20002 | (202) 543-9515 |
| R U Svc 3319 17th St Nw, Washington 20010 | (202) 667-5665 |
| Raymonds Plumbing & Heating 712 Malcolm X Ave Se, Washington 20032 | (202) 561-2391 |
| Sam's Plumbing & Heating 1161 46th Pl Se, Washington 20019 | (202) 575-1291 |
| Sayre Plumbing & Heating Inc 830 Kennedy St Nw, Washington 20011 | (202) 829-2334 |
| Seidel Plumbing & Heating Co 1354 Florida Ave Ne, Washington 20002 | (202) 397-7000 |
| Solomon Graham Plbg & Htg Inc 3848 S Capitol St Se, Washington 20032 | (202) 373-5575 |
| Smallenbroek Plumbing & Htg 10610 Iron Bridge Rd, Washington 20016 | (202) 237-6400 |
| Steve Miller Plumbing & Htg 815 C St Ne, Washington 20002 | (202) 544-6366 |
| Thomas Plumbing Co 2619 Evarts St Ne, Washington 20018 | (202) 829-8100 |
| Wright Brothers Plumbing & Htg 2904 12th St Ne, Washington 20017 | (202) 635-9300 |
| Waterworks 3314 M St Nw, Washington 20007 | (202) 333-7180 |
| Utley Mechanical Inc 1008 Florida Ave Ne, Washington 20002 | (202) 396-9278 |
| W Jenkins Plumbing 5119 8th St Nw, Washington 20011 | (202) 291-1024 |
| W Jenkins Plumbing & Heating 5119 8th St Nw, Washington 20011 | (202) 667-7620 |
| A-1 Fry Plumbing & Heating 327 L St Ne, Washington 20002 | (202) 543-4884 |