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List of Certified Backflow Testers

The testers on this list have demonstrated their ability to field test Backflow Prevention Assemblies to the satisfaction of the District. Marin Water assumes no liability for the abilities, performance or quality of work performed by individuals listed. The company or individual utilizing the Backflow Prevention Assembly Tester should determine that the tester maintains liability insurance. 

WARNING: State law requires that any plumbing work exceeding $500 must be completed by a licensed contractor. 

Marin Water List of Certified Testers 

Revised Nov. 4, 2024 

C - Denotes this tester as a licensed contractor though the California Contractors State License Board

S - Denotes this tester is also a cross-connection specialist

Name EmailPhone OrganizationCert. No.
Ammons, David ammonsbackflowcertifiedtesting@gmail.com (415) 712-4863Ammons Certified Backflow Testing18345
Anderson, WilliamCservice@backflow-prevention.com(800) 464-3569Backflow Prevention Specialists16734
Argall, GrierCgrierargall@gmail.com(415) 457-0748Grier Argall Plumbing17400
Atkinson, PatrickCoffice@miketestaplumbing.com (415) 479-0110Mike Testa Plumbing16516
Baca, ElijahCservice@burkell.com(415) 332-3091Burkell Plumbing Inc. 19214
Barnhart, KyleCoffice@miketestaplumbing.com (415) 479-0110Mike Testa Plumbing15695
Bateman, JasonCcheckritebackflow@sonic.net(707) 575-5296Checkrite Backflow Service, Inc19294
Beal, ChristopherCrme@sonic.net(707) 584-5880Robert's Mechanical & Electric11769
Beckman, RobertCrme@sonic.net(707) 584-5880Robert's Mechanical & Electric14793
Benett, John info@aaabft.com(415) 980-0635AAA Backflow Testing LLC15908
Brekhus, JakobCdan@dansmarinplumbing.com(415) 462-5858Dan's Plumbing18769
Brinkerhoff, Aaron marinbackflow@gmail.com(415) 290-8070Marin Backflow06722
Campos, MartinCservice@backflow-prevention.com(800) 434-3569Backflow Prevention Specialists19241
Castillo, JacobCinfo@thorpedesign.com(925) 634-5758Thorpe Design Inc.16327
Chan, PeterCgrodich@citymechanical.com(510) 724-9088City Mechanical Inc09209
Cooper, EvanCservice@backflow-prevention.com(800) 464-3569Backflow Prevention Specialists12711
Croom, KristopherCkristopher.croom@therma.com (408) 347-3533Therma Inc.17495
Cruz, ReubenCasti@fireservices.com(707) 645-1782A.S.T.I. Services18662
Daley, DonaldCoffice@miketestaplumbing.com(415) 479-0110Mike Testa Plumbing05779
Day, WayneCservice@backflow-prevention.com(800) 464-3569Backflow Prevention Specialists16119
De La Fuente, JamesCrcnerviani@gmail.com(415) 246-2343Nerviani's Backflow Testing and Repair19239
Del Testa, DavidCrcnerviani@gmail.com(415) 246-2343Nerviani's Backflow Testing and Repair17279
Delzer, MarkCservice@acmebayareabackflow.com(925) 484-8477ACME Bay Area Backflow16428
Faria, MichaelCinfo@thorpedesign.com(925) 766-0849Thorpe Design Inc.13883
Femenia, KristoferCoffice@pedrofemenia.com(415) 721-7473Pedro Femenia & Sons, Inc.16140
Fricke, ChrisCservice@burkell.com(415) 332-3091Burkell Plumbing15486
Gallagher, Robert service@abpbackflow.com(888) 356-7761Associated Backflow Professionals16440
Guntle, Bryan bgbackflowsvcs@gmail.com(707) 696-7010BG Backflow Testing14787
Haynes, CaseyCsteadbackflow@gmail.com(209) 327-3900Stead Backflow17097
Keddy, BrandonCcustomerservice@thebackflowguy.com(877) 384-3489The Backflow Guy, Inc.18290
Keddy, DannyCcustomerservice@thebackflowguy.com(877) 384-3489The Backflow Guy, Inc.15884
Majic, TomC/Sthebackflowpro@gmail.com(800) 511-2210The Backflow Pro11277/2041
McCreery, WilliamCservice@backflow-prevention.com(800) 464-3569Backflow Prevention Specialists18120
Medeiros, MattCthebackflowpro@gmail.com(800) 511-2210The Backflow Pro14788
Nemkovich, MaxC/Snemkovich@gmail.com(415) 368-3559Chris' Plumbing12810/2166
Nerviani, RonCrcnerviani@gmail.com(415) 246-2343Nerviani's Backflow Testing and Repair00057
Ochoa, ManuelCthebackflowpro@gmail.com (800) 511-2210The Backflow Pro18890
Oyen, Wyatt robertsonsbackflow@yahoo.com (530) 417-4084Robertson's Backflow19168
Padilla, AnthonyCcheckritebackflow@sonic.net(707) 575-5296Checkrite Backflow Service, Inc19022
Powell, Gavin gdpfirepro@gmail.com(209) 484-2718Greater Bay Backflow LLC17914
Real, KalebCdjsherin@backflowteam.com(888) 230-2747Backflow Team, LLC18088
Rios-Torres, FidelCservice@backflow-prevention.com(800) 464-3569Backflow Prevention Specialists18426
Robello, AaronCnorthbaybackflow@comcast.net(707) 484-3949Northbay Backflow12944
Roberts, Thomas Crme@sonic.net(707) 584-5880Robert's Mechanical & Electric3622
Romero, ReneCrene@romerolandscapes.com(209) 639-7017Romero's Landscape18143
Salcido, Miguel salcidosbackflow@gmail.com(408) 561-3135Salcido's Backflow Testing14894
Santens, TaraC/Sservice@backflow-prevention.com(800) 464-3569Backflow Prevention Specialists08743
Schoop, CharlesCcheckritebackflow@sonic.net(707) 575-5296Checkrite Backflow Service, Inc06480
Schultz, PaulCpaul.schultz@cagwin.com(800) 891-7710Cagwin and Dorward10973
Shepherd, GregoryCservice@backflow-prevention.com(800) 464-3569Backflow Prevention Specialists12708
Sherin, Dave davesherin@backflowteam.com(888) 230-2747Backflow Team, LLC12131
Smith, HanselCdani@gotelliplumbing.com(415) 457-1145Gotelli Plumbing Company15962
Smith, SamuelCservice@backflow-prevention.com(800) 464-3569Backflow Prevention Specialists19249
Stallings, Bob info@415test.com(415) 894-0060415 Testing11786
Vennel, MichaelCservice@backflow-prevention.com(800) 464-3569Backflow Prevention Specialists07257
Washington, JohnCkirkwood050@gmail.com(415) 302-7943Backflow Prevention Specialists07257
Wise, JackCkirkwood050@gmail.com(415) 485-4472Marin Mechanical II, Inc13728
Woods, KennyCkennywoods@backflowteam.com(888) 230-2747Matrix HG Inc.17344