| #1 Radon Inc | C-1 | Active |
| 1home Construction LLC | C-1D | Active |
| 1st Las Vegas Plumbing And Repair LLC | C-1D | Active |
| 20 20 Plumbing & Heating Inc | C-1 | Active |
| 238 Mechanical Corporation | C-1 | Active |
| 3 16 Plumbing | C-1D | Active |
| 3 Bears Air Conditioning LLC | C-1H | Active |
| 365 Plumbing Of Nevada LLC | C-1D | Active |
| 4 Seasons Plumbing Services | C-1D | Active |
| 5 Star Home Services Inc | C-1D | Active |
| 9th Island Plumbing LLC | C-1 | Active |
| A & M Plumbing And Heating LLC | C-1 | Active |
| A 1 Action Plumbing And Rooter Inc | C-1 | Active |
| A 2 Z Plumbing LLC | C-1 | Active |
| A A A Precision Plumbing | C-1D | Active |
| A A Cassaro Plumbing | C-1 | Active |
| A Affordable Plumbing Heating Cooling And Mechanical | C-1 | Active |
| A B C Contractors Inc | C-1 | Active |
| A Better Plumbing Company LLC | C-1D | Active |
| A M I Mechanical LLC | C-1 | Active |
| A M R Plumbing | C-1 | Active |
| A To Z Plumbing & Heating | C-1 | Active |
| Able Plumbing | C-1 | Active |
| Abraham Mechanical Services | C-1 | Active |
| Acco Engineered Systems Inc | C-1 | Active |
| Accurate Backflow Company | C-1 | Active |
| Ace Services Plumbing Air Electrical | C-1D | Active |
| Ace-Flo Plumbing | C-1 | Active |
| Active Plumbing | C-1 | Active |
| Acx LLC | C-1D | Active |
| Adaven Plumbing Inc | C-1D | Active |
| Advanced Home Services LLC | C-1D | Active |
| Air Pro Master LLC | C-1 | Active |
| Air Squad Heating & Air Conditioning LLC | C-1D | Active |
| Airbender A/C & Heating LLC | C-1D | Active |
| Alan Mechanical LLC | C-1 | Active |
| Ale Appliance Life Extender LLC | C-1H | Active |
| All Around Plumbing | C-1 | Active |
| All In One Remodeling LLC | C-1D | Active |
| Alpha Plumbing LLC | C-1D | Active |
| Amazon Plumbing | C-1D | Active |
| American Brothers LLC | C-1 | Active |
| And Plumbing One LLC | C-1 | Active |
| Anderson Air Mechanical | C-1D | Active |
| Andrews Plumbing & Repair Inc | C-1D | Active |
| Anthem Plumbing Company | C-1D | Active |
| Anytime Plumbing, Heating, And Cooling | C-1 | Active |
| Aqua Plumbing Service & Repair LLC | C-1 | Active |
| Aquaflow Plumbing | C-1D | Active |
| Archer Air Conditioning & Heating | C-1D | Active |
| Argentino Management Group Inc | C-1D | Active |
| Asap Water Heaters LLC | C-1H | Active |
| Ask Plumbing | C-1D, C-1G, C-1I | Renew by Oct 31, 2026 |
| Aztec Plumbing Services LLC | C-1 | Active |
| B & D Plumbing LLC | C-1D | Active |
| B & L Plumbing Of NV Inc | C-1D | Active |
| B B Mechanical LLC | C-1 | Active |
| B C Plumbing | C-1D | Active |
| B G Star Plumbing LLC | C-1D | Active |
| Baigs Construction | C-1D | Active |
| Bailey Plumbing Corporation | C-1D | Active |
| Base Line Plumbing LLC | C-1 | Active |
| Bathroom Brad LLC | C-1D | Active |
| Beast Plumbing LLC | C-1 | Active |
| Beebe Plumbing LLC | C-1D | Active |
| Best Air Conditioning Plumbing Repair | C-1D | Active |
| Big Dawg Plumbing LLC | C-1 | Active |
| Bill Howe Pipe Rehabilitation LLC | C-1D | Active |
| Blue Diamond Plumbing LLC | C-1D | Active |
| Blue Wave Pools And Plumbing LLC | C-1 | Active |
| Bombard Mechanical LLC | C-1 | Active |
| Boom Rooter & Hydro Jetting LLC | C-1D | Active |
| Borlase Plumbing Company | C-1D | Active |
| Boss Plumbing Inc | C-1 | Active |
| Bowtie Home Services LLC | C-1 | Active |
| Bozarth Plumbing LLC | C-1D | Active |
| Brass2copper Mechanical Inc | C-1 | Active |
| Bravo Plumbing Services LLC | C-1D | Active |
| Buddys Plumbing Repair | C-1 | Active |
| Building New Structure LLC | C-1D | Active |
| Buildream Plumbing LLC | C-1 | Active |
| Bumble Breeze HVAC LLC | C-1D | Active |
| Burpees Plumbing Nevada | C-1 | Active |
| Butlers Construction And Service Solutions LLC | C-1D | Active |
| Butter Plumbing | C-1D, C-1G, C-1H | Active |
| C & C Plumbing LLC | C-1 | Active |
| C & H Plumbing LLC | C-1D | Active |
| Calderone Inc | C-1D | Active |
| Call Of Dooty LLC | C-1D | Active |
| Calpolli Complete Plumbing; Kings Valley Plumbing | C-1D | Active |
| Canyon Plumbing LLC | C-1D | Active |
| Capital Plumbing Inc | C-1D | Active |
| Cerris Systems West Inc | C-1 | Active |
| CG Plumbing Solutions | C-1D | Active |
| Champion Services | C-1D, C-1H | Active |
| Choice Plumbing LLC | C-1D | Active |
| City Wide Plumbing LLC | C-1D | Active |
| Classic Water Heaters LLC | C-1H | Active |
| Classical Elements Mechanical LLC | C-1 | Renew by Oct 31, 2026 |
| Clearwater Mechanical Inc | C-1 | Active |