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The 10 Best Water Heater Installations in San Francisco (2026)
This list ranks the best water heater installation providers serving the Bay Area using Google review data and a Bayesian-style score that weights average rating by review volume. Updated for 2026, the ranking emphasizes both customer satisfaction and the number of people who’ve shared their experiences. San Francisco’s housing stock and varied building types make water heater work different from neighborhood to neighborhood, so local knowledge and a track record of completed installs matter. Use these vetted listings as a starting point when you’re planning replacements, upgrades, or emergency service in the city and surrounding communities.
This ranking is computed from Google reviews (our method). Listings marked Partner are paid advertising spots: they sit alongside the ranking without changing its order.
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Flow Masters Plumbing, Drain and Water Heater
Flow Masters Plumbing, Drain and Water Heater tops our list thanks to a perfect 5.0 Google rating combined with a very large review count (712), indicating sustained high marks from many customers. Listed in the Google category “Plumber,” the company’s name also signals expertise with water heaters and related plumbing work. That mix of flawless rating and significant review volume is what pushes it above competitors with similar scores but fewer reviews.
The full ranking
Excalibur Water Heaters Inc
Listed as a Plumber with a perfect 5.0 rating from 167 Google reviews; the business appears in the ranking without an address listed in the public data.
167 reviews
Hydroflow
Located at 3322 Balboa St in San Francisco, Hydroflow is categorized as a Plumber and maintains a 5.0 rating from 109 reviews on Google.
109 reviews
Fast Response Water Heaters
Shown as a Plumber with a 5.0 Google rating based on 87 reviews; no street address was provided in the dataset used for this ranking.
87 reviews
Peninsula Water Heaters
A Hot water system supplier based in Brisbane (440 Monterey St) with a perfect 5.0 rating from 59 Google reviewers.
59 reviews
Flow Masters Plumbing, Drain and Water Heater
This second listing for Flow Masters is recorded at 1 Embarcadero Ctr #1200 in San Francisco, carries a 5.0 rating, and has 15 Google reviews.
15 reviews
Delivery Water Heater,Inc.
Located at 248 Ocean Ave in San Francisco, this Plumber is recorded with a 5.0 rating from 13 Google reviews.
13 reviews
Magic Plumbing Heating & Cooling
Serving San Francisco from 1455 Bancroft Ave, this Plumber has a 4.9 Google rating across 1,931 reviews, reflecting a large base of customer feedback.
1931 reviews
Heise’s Plumbing
Heise’s Plumbing is listed as a Plumber at 260 Ocean Ave in San Francisco and holds a 4.9 rating with 1,786 Google reviews.
1786 reviews
Cabrillo Plumbing, Heating & Air
Based at 78 Dorman Ave in San Francisco and categorized as a Plumber, Cabrillo has a 4.9 Google rating from 1,187 reviewers.
1187 reviews
Frequently asked questions
How should I choose a company for water heater installation?
Look for licensed plumbers or suppliers with strong, recent reviews and experience with the type of system you need (tank, tankless, hybrid). Ask about warranties, permits, and whether they handle disposal and code-compliant installation; clear answers and documentation are good signs.
What factors affect the cost of a water heater installation?
Cost depends on the type and size of the unit, complexity of the installation, any required upgrades to plumbing or venting, and local permit or inspection fees. Labor rates, removal of the old unit, and whether additional work (like seismic strapping or gas-line changes) is needed will also influence the final price.
What should I check before hiring a water heater installer?
Verify the contractor’s license and insurance, request references or recent reviews, and get a written estimate that details parts, labor, permits, and warranty terms. Confirm who will pull permits and whether the installer guarantees their work in writing.
How was this ranking of water heater installers compiled?
This list was built from Google review data and uses a score that weights average ratings by the number of reviews to balance high ratings with review volume. It was updated for 2026 to reflect current public reviews and listed Google categories.