| Business | Phone |
| A Avis Plumbing Heating & A/C Diamond Bar 91765 | (909) 860-5868 |
| American Leak Detection Diamond Bar 91765 | (909) 861-3884 |
| George Brazil Plbg Htg & Ac 3302 S Diamond Bar Blvd, Diamond Bar 91765 | (909) 594-0289 |
| Vinyard Plumbing & Drain 324 S Diamond Bar Blvd, Diamond Bar 91765 | (909) 396-8337 |
| Sur's Plumbing 20945 Flapjack Dr, Diamond Bar 91765 | (909) 594-9592 |
| Les's Plumbing Svc 21299 Running Branch Rd, Diamond Bar 91765 | (714) 525-2660 |
| Mike Diamond Plumbing Heating Diamond Bar 91765 | (909) 396-4937 |
| Mr. Drain Plumbing 780 N Diamond Bar Blvd #B19, Diamond Bar 91765 | (909) 259-0190 |