| 20 / 20 Plumbing & Heating Inc | C36 | 2015 | Active |
| A And V Socal Plumbing Services | C36 | 2023 | Active |
| A P S Construction Inc | C36 | 2007 | Active |
| Aaa Plumbing Heating And Air Conditioning Inc | C36 | 2024 | Active |
| Absolutte Plumbing And Rooter Care | C36 | 2020 | Active |
| Aero Precision Mechanical Inc | C36 | 2026 | Active |
| Afc Pipeline | C36 | 2014 | Active |
| Affordable Home Works Inc | C36 | 2020 | Active |
| All Plumbing & Air Solutions | C36 | 2015 | Active |
| All Star American Plumbing | C36 | 2026 | Active |
| American Leak Locators & Plumbing Inc | C36 | 2020 | Active |
| Anderson Plumbing | C36 | 1991 | Active |
| Aqua Backflow And Chlorination Inc | C36 | 1999 | Active |
| Axp Plumbing Solutions | C36 | 2025 | Active |
| B A S Plumbing Inc | C36 | 2008 | Active |
| B D Mechanical Inc | C36 | 2005 | Active |
| Bany Plumbing Engineering | C36 | 2025 | Active |
| Beastmode Plumbing And Rooter Inc | C36 | 2022 | Active |
| Big John's Plumbing Inc | C36 | 2009 | Active |
| Bom Construction Inc | C36 | 2015 | Active |
| Brinovin Plumbing & Backflow LLC | C36 | 2026 | Active |
| C A T T Plumbing Inc | C36 | 2009 | Active |
| Cal-Mex Plumbing Inc | C36 | 2025 | Active |
| California Plumbing Services | C36 | 2021 | Active |
| Carns Rooter Inc | C36 | 2004 | Active |
| Champion Plumbing And Drain Specialist Inc | C36 | 2019 | Active |
| Cheap Plumbers And Rooter | C36 | 2023 | Active |
| Chico's Plumbing Inc | C36 | 2010 | Active |
| City Boys Plumbing | C36 | 2026 | Active |
| Craig Mechanical Inc | C36 | 1984 | Active |
| Cross Plumbing Inc | C36 | 2022 | Active |
| D & P Leak Detection Inc | C36 | 2017 | Active |
| Diamond House Plumbing | C36 | 2003 | Active |
| Dragonfly Heating And Cooling | C36 | 2009 | Active |
| Drains And Plumbing 24 | C36 | 2022 | Active |
| E P S | C36 | 2017 | Active |
| E R Block Plumbing | C36 | 1993 | Active |
| Eez Coyoy Plumbing Inc | C36 | 2025 | Active |
| Elements Plumbing & Water Systems Inc | C36 | 2023 | Active |
| Elite Plumbing & Drains LLC | C36 | 2022 | Active |
| Elite Plumbing Solutions LLC | C36 | 2026 | Active |
| Empyrean Plumbing Inc | C36 | 2006 | Active |
| Endo Plumbing Co Inc | C36 | 2010 | Active |
| Evergreen Environment Inc | C36 | 2002 | Active |
| Evolution Water & Plumbing Inc | C36 | 2025 | Active |
| Exact Leak Detection Inc | C36 | 1994 | Active |
| Executive Plumbing Service Inc | C36 | 2018 | Active |
| F S S Companies Inc | C36 | 2011 | Active |
| Family Ties Air Plumbing And Drain | C36 | 2022 | Active |
| First Choice Plumbing Heating & Air Conditioning Inc | C36 | 1969 | Active |
| First Class Plumbing & Rooter Services Inc | C36 | 2021 | Active |
| First Place Leak Detection Inc | C36 | 2015 | Active |
| Fit Right Plumbing Inc | C36 | 2026 | Active |
| Fix It Felix Plumbing Inc | C36 | 2019 | Active |
| G & G Backflow | C36 | 2016 | Active |
| Gie Plumbing | C36 | 2026 | Active |
| Good News Plumbing Inc | C36 | 1984 | Active |
| H S Q Plumbing Inc | C36 | 2002 | Active |
| Hasco Heating Airconditioning Service Company Inc | C36 | 1987 | Active |
| Hercules Plumbing Inc | C36 | 2016 | Active |
| Hovey Rooter Service | C36 | 2009 | Active |
| Inland Plumbing Solutions Inc | C36 | 2025 | Active |
| J P Plumbing Systems Inc | C36 | 2006 | Active |
| J.Adams Air Conditioning Heating And Plumbing Corp | C36 | 2024 | Active |
| Jim & Sons Plumbing And Rooter Inc | C36 | 2018 | Active |
| John Mahany Plumbing Inc | C36 | 2020 | Active |
| JRB Plumbing Inc | C36 | 2021 | Active |
| Julios Economy Plumbing Inc | C36 | 1991 | Active |
| Luna's Plumbing Inc | C36 | 2007 | Active |
| M & S Equipment Inc | C36 | 1989 | Active |
| M B Plumbing Air Conditioning & Heating Inc | C36 | 1995 | Active |
| M C I Plumbing Corp | C36 | 2011 | Active |
| Majestic Plumbing Inc | C36 | 2007 | Active |
| Mav Construction Inc | C36 | 2021 | Active |
| MHC Group LLC | C36 | 2026 | Active |
| Moisin Group Inc | C36 | 2015 | Active |
| New Star Plumbing Inc | C36 | 2015 | Active |
| Next Generation Jetting LLC | C36 | 2018 | Active |
| Nir Plumbing Inc | C36 | 1998 | Active |
| Pacific Production Plumbing | C36 | 2002 | Active |
| Paul Davis Restoration Of The Inland Empire | C36 | 2008 | Renew by Nov 30, 2026 |
| Pipeline Plumbing By Kevin Roundy Inc | C36 | 2017 | Active |
| Pka Plumbing Inc | C36 | 2026 | Active |
| Plumbing Dynamics Inc | C36 | 1999 | Active |
| Plumbing Master | C36 | 2015 | Active |
| Plumbing Matters Rooter & Plumbing Services Incorporated | C36 | 2021 | Active |
| Premier Plumbing Company | C36 | 1998 | Active |
| Prestige Plumbing LLC | C36 | 2025 | Active |
| R A W Services Inc | C36 | 2011 | Active |
| Rdodson Plumbing & Rooter Inc | C36 | 2024 | Active |
| Right Services Inc | C36 | 2026 | Active |
| Righty Tighty Plumbing Inc | C36 | 2023 | Active |
| Robert C L Plumbing Heating & Air Inc | C36 | 2007 | Active |
| Rock Jacob Inc | C36 | 2017 | Active |
| Rooter Alert | C36 | 2002 | Active |
| Rooter Pro Plumbing Pro Inc | C36 | 2022 | Active |
| Rooter Warrior Plumbing And Drain Cleaning | C36 | 2018 | Active |
| Rossman Plumbing | C36 | 2023 | Active |
| S & P Plumbing Inc | C36 | 1976 | Active |
| S G R Inc | C36 | 1989 | Active |