| Business | Phone |
| A-1 Plumbing & Heating 347 Skyview Pl, Waterloo N2V 1S3 | (519) 884-0364 |
| Ivan Raos Plumbing 722 Holly View Pl, Waterloo N2V 2N1 | (519) 885-0955 |
| Kastl & Zuch Plumbing & Htg 3 Colby Crt, Waterloo N2V 1Y9 | (519) 884-0990 |
| Mc Glynn Plumbing Ltd 196 Rodney St, Waterloo N2J 1G5 | (519) 578-0344 |
| O & R Maecker Plumbing & Heat 57 Roosevelt Ave, Waterloo N2L 2N3 | (519) 746-3121 |
| Par Mechanical Contractors Ltd 363 Dale Cres, Waterloo N2J 3Y6 | (519) 884-1771 |
| Paton Brothers Ltd 169 Lexington Crt #E, Waterloo N2J 4R4 | (519) 885-2140 |
| Butler Plumbing & Heating 640 Eby Crest Rd, Waterloo N2J 4G8 | (519) 745-4963 |
| Delta De-Liming 510 Dotzert Crt #1, Waterloo N2L 6A7 | (519) 743-0361 |
| Doug Kenny & Son Plumbing 57 Erb St W, Waterloo N2L 6C2 | (519) 884-9977 |