Top 6 Backflow Testing in San Diego, CA

Updated March 2026 · Based on licensing, reviews & response time

Quick Answer

Top providers: Bill Howe Plumbing, Heating & Air, Restoration & Flood Services (4.8), Anderson Plumbing, Heating & Air (4.8), Core Plumbing (4.8)

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1

Pass 2 Pay Backflow

9453 Debbie Ct, El Cajon, CA 92021, USA
★★★★½ 4.9 (148 reviews)
Licensed & InsuredTop Rated
Services: Backflow Testing
2

Certified Backflow tester

12523 Glen Oak Rd, Poway, CA 92064, USA
★★★★★ 5 (14 reviews)
Licensed & InsuredTop Rated
Services: Backflow Testing
3

Mr. Backflow

3471 Camino Michelle, Carlsbad, CA 92009, USA
★★★★★ 5 (106 reviews)
Licensed & InsuredTop Rated
Services: Backflow Testing
4

American Backflow Specialties°

2860 Market St #64, San Diego, CA 92102, USA
☆☆☆☆☆ 0 (0 reviews)
Licensed & Insured
Services: Backflow Testing
5

Water Wise Plumbing, Backflow & Drains

1205 N Melrose Dr Suite E, Vista, CA 92083, USA
★★★★★ 5 (421 reviews)
Licensed & Insured
Services: Backflow Testing
6

One Stop Backflow Supply

9133 Chesapeake Dr, San Diego, CA 92123, USA
★★★★½ 4.9 (10 reviews)
Services: Backflow Testing

How We Ranked These San Diego Pros

Our rankings are based on a weighted evaluation of five key factors:

  1. Licensing & Insurance — All listed businesses hold active state licenses verified through official databases.
  2. Customer Reviews — We aggregate ratings from Google, Yelp, and the BBB, weighting recency and review volume.
  3. Response Time — Companies offering same-day or 24/7 emergency service score higher.
  4. Pricing Transparency — Businesses who offer flat-rate pricing or free estimates rank above those with opaque billing.
  5. Experience & Longevity — Years serving the San Diego market and breadth of services factor into overall reliability.

Rankings are reviewed quarterly. Have a correction? Contact us.

Frequently Asked Questions

Best backflow testing in San Diego?

Top-rated: Bill Howe Plumbing, Heating & Air, Restoration & Flood Services (4.8), Anderson Plumbing, Heating & Air (4.8), Core Plumbing (4.8).