| Everyday Waterheaters & Filtration | C36 | 2025 | Active |
| Evo Air | C36 + C20 | 2017 | Active |
| Exodus Plumbing Inc | C36 | 2019 | Active |
| Express Plumbing Heating And Air Inc | C36 + C20, D35 | 2010 | Renew by Nov 30, 2026 |
| Ez Dry Flood Damage Inc | C36 + B | 2019 | Active |
| Federal Plumbing And Drain Inc | C36 | 1992 | Active |
| Final Touch Restoration | C36 + B, C10, C20 | 2025 | Active |
| Finest City Construction Inc | C36 + B | 2015 | Active |
| Fischbeck Plumbing Co Inc | C36 | 2004 | Renew by Dec 31, 2026 |
| Flow Tech Plumbing & Rooter | C36 | 2011 | Active |
| Flow-Rite Plumbing And Water Heaters Inc | C36 | 2021 | Active |
| Flush Force One Plumbing LLC | C36 | 2026 | Active |
| Forster John Plumbing Inc | C36 | 2007 | Active |
| Forthright Plumbing Pros Inc | C36 | 2017 | Active |
| Fox Plumbing | C36 | 2001 | Active |
| Fox Pump Systems | C36 | 2009 | Active |
| Fox Pump Systems Inc | C36 | 1992 | Renew by Nov 30, 2026 |
| Frankie's Plumbing LLC | C36 | 2022 | Active |
| Friars Heating And Air Conditioning Inc | C36 + C20 | 2019 | Active |
| Fud And Son Plumbing Inc | C36 | 2012 | Active |
| G M Renovations Inc | C36 + B, C10 | 2009 | Active |
| G-Force Plumbing Services | C36 | 2024 | Renew by Dec 31, 2026 |
| G/K Plumbing & Heating Inc | C36 + C20 | 1981 | Active |
| Ge Plumbing West LLC | C36 | 2026 | Active |
| Get Rooter & Plumbing | C36 | 2020 | Renew by Dec 31, 2026 |
| Golden State Plumbing & Drain Co | C36 | 2002 | Active |
| Griffin Certified | C36 + A, B, C10 +1 | 2007 | Active |
| Guzman And Sons Inc | C36 | 2022 | Active |
| H20 Plumbing & Repiping Pros Inc | C36 | 2026 | Active |
| H2o Leak Detection Services LLC | C36 | 2026 | Active |
| Haffner Mechanical Systems | C36 | 2017 | Active |
| Hang Ten Plumbing & Drains | C36 | 2026 | Active |
| Harrison Plumbing | C36 | 2020 | Active |
| HNG Plumbing SD | C36 | 2026 | Active |
| Homepro Plumbing & Drains | C36 | 2023 | Active |
| Howell Plumbing Inc | C36 | 2009 | Active |
| Ideal Plumbing Heating Air Electrical Inc | C36 + B, C10, C20 | 1977 | Active |
| III In I Construction Inc | C36 + B, C10, C20 | 1996 | Active |
| Integrity Plumbing And Landscaping LLC | C36 + C27 | 2007 | Active |
| J Geyer Plumbing Inc | C36 | 1997 | Active |
| J W R P Inc | C36 | 2006 | Active |
| Jackson & Blanc | C36 + B, C4, C7 +3 | 1960 | Active |
| Jakobsen Restoration | C36 + B | 2023 | Active |
| Jantz Construction Inc | C36 + B | 2006 | Active |
| Jantz Plumbing Inc | C36 | 2020 | Active |
| Jessen Building Group | C36 + B | 2022 | Active |
| John Padilla Plumbing | C36 + C20 | 2021 | Active |
| Just 365 Plumbing Care | C36 | 2024 | Active |
| Kellems Plumbing Inc | C36 | 2025 | Active |
| Kraken Water Systems | C36 | 2026 | Active |
| L & L Enterprises | C36 + ASB, B, D64 | 2023 | Active |
| L&S Plumbing LLC | C36 | 2024 | Active |
| Larry Hudson Plumbing Inc | C36 | 2016 | Active |
| Lawson Plumbing Repair | C36 | 2024 | Active |
| Leafdale Plumbing A Partnership | C36 | 1999 | Active |
| Left Coast Plumbing | C36 | 2018 | Active |
| Lefty's Plumbing Inc | C36 | 2024 | Active |
| Level - Up Rooter | C36 | 2021 | Active |
| Lighter Living Co | C36 + C20 | 2014 | Active |
| LJ Plumbing Inc | C36 | 2026 | Active |
| Lobo Plumbing Services Inc | C36 | 2023 | Active |
| Lulu's Plumbing | C36 | 2025 | Active |
| Mars Group Services LLC | C36 + B | 2026 | Active |
| Master Plumbing & Leak Detection | C36 | 2000 | Active |
| Merz Construction Inc | C36 + B, C8, C10 +5 | 1985 | Active |
| Mesa Plumbing | C36 | 2019 | Active |
| MHG Plumbing Inc | C36 | 2018 | Active |
| Michael's Valley Plumbing Services Pros Inc | C36 | 2017 | Active |
| Milton Wayne Plumbing Inc | C36 | 2005 | Active |
| Mirak Plumbing Inc | C36 | 2022 | Active |
| Mission Bay Plumbing Flood And Fire | C36 + D64 | 2025 | Active |
| Moniko Construction & Plumbing Inc | C36 + B | 2016 | Active |
| Morehouse Financial Group Inc | C36 + B, C33 | 2011 | Active |
| Morey Plumbing | C36 + C20 | 2011 | Active |
| Mr Al Plumbing | C36 | 2019 | Active |
| Mr Plumbing Inc | C36 | 2020 | Active |
| Mr Rooter Plumbing | C36 | 2012 | Active |
| My Plumbing Doctor Inc | C36 | 2023 | Active |
| Myron Plumbing Inc | C36 | 1991 | Active |
| Nearby Plumbing Service LLC | C36 | 2023 | Active |
| Net Zero Water Heating | C36 | 2024 | Active |
| New Image General Construction Inc | C36 + B, D63, D64 | 2023 | Active |
| Nexus Plumbing Inc | C36 | 2009 | Active |
| Nobility Plumbing | C36 | 2024 | Active |
| Noel Plumbing Inc | C36 | 1998 | Active |
| O & J Plumbing Services Inc | C36 | 2016 | Active |
| One Affordable Backflow Inc | C36 | 2025 | Active |
| One Hat Construction Inc | C36 + A, B, C8 | 2019 | Active |
| One Stop Comfort Center Inc | C36 + B, C10, C20 | 2022 | Active |
| Ozzy's Plumbing & Drain Service Inc | C36 | 2004 | Active |
| P & V Construction | C36 + B | 2006 | Active |
| P C I General Construction | C36 + B, C20 | 2007 | Active |
| Pacific Beach Plumbing Inc | C36 | 1994 | Active |
| Pacific Cove Construction & Plumbing | C36 + B, C27, C29 | 1985 | Active |
| Pacific Plumbing LLC | C36 | 2025 | Active |
| Pacific Plumbing Service Inc | C36 + A, B | 2004 | Active |
| Pacific Rim Mechanical Contractors Inc | C36 + B, C2, C4 +1 | 2002 | Active |
| Pacific Tankless Inc | C36 + B | 2019 | Active |
| Pat's Plumbing & Drains | C36 + B | 2013 | Active |
| Paws Plumbing | C36 | 2025 | Active |