ProMax Tankless Water Heaters and Plumbing

Company Facts

ProMax Tankless Water Heaters and Plumbing at a Glance

By the numbers

Google rating

5.0out of 5

Customer reviews

106on Google

Rating and review count pulled from Google on September 27, 2026.

What We Like

• 5.0 rating from 106 reviews on its Google Business Profile, read September 27, 2026
• Deep specialism in tankless and tank water heaters, including commercial cascade installs
• Contractor license 1001502 published openly on its own website
• Handles the supporting work conversions require, from gas lines to recirculation pumps
• Covers San Diego County from Oceanside to Chula Vista, with San Diego and La Mesa addresses

Things to Consider

• No prices published; the site directs you to call for pricing on every service
• Closed Sundays and no advertised 24-hour emergency call-out
• Focus sits on installation and remodel work rather than urgent drain or sewer emergencies

Google rating

5.0

Based on 106 Google reviews

Review data updated September 27, 2026

View on Google Maps →

Rating Distribution

• 5 stars99%
• 4 stars1%

Ask any San Diego homeowner who has swapped a 40-gallon tank for a tankless unit and you will hear that the heater itself was the easy part. The gas line often needs upsizing, the venting has to be redone in stainless, condensate needs somewhere to go on a condensing model, and if you want hot water at the far bathroom without a two-minute wait you are into recirculation pumps and return lines. That cluster of work is what promax tankless water heaters and plumbing appears to do day in and day out, judging by the volume and variety in its own project gallery.

The company describes itself as locally owned, with a founder who ran a family plumbing business in Europe for more than a decade before moving to the US in 2010 and subcontracting for a large national outfit. It claims thousands of water heater and tankless installations since. Treat that as the company's own account rather than something independently confirmed, but the breadth of the photographed work supports the general picture: outdoor wall-mounted units with cover plates, relocations, pre-filter systems, commercial cascade setups at a nail salon, a tankless install at a Subway, gas line runs for commercial heaters, 75-gallon tanks with expansion tanks and return lines.

Range goes beyond heaters without pretending to cover everything. Repiping, indoor and outdoor piping, water treatment including Pelican systems and reverse osmosis, kitchen and bathroom fixtures, toilets, garbage disposals with drain reconnection, and the plumbing portion of a bathroom remodel. What you will not find advertised is emergency drain clearing at two in the morning. Published hours run 8am to 7pm on weekdays, 8am to 5pm Saturday, closed Sunday, which reads like a planned-work business rather than a 24-hour call-out operation. If your problem is a sewer backup tonight, ring someone who sells that. If your problem is a heater that has finally given up, or a conversion you have been considering for two years, this is closer to the right call.

The rating deserves a mention because it is unusual. On September 27, 2026 the Google Business Profile showed 5.0 from 106 reviews. A hundred-plus reviews with no dissent at all is rare in plumbing, and it tends to indicate work that is scoped clearly before anyone starts. The site also points to Yelp and Facebook pages and mentions Thumbtack reviews, so there are other places to cross-check tone and detail before you commit.

Local conditions matter here more than people expect. San Diego water is hard, and hard water is what kills tankless heat exchangers early if nobody descales them. Ask about flushing intervals and whether a pre-filter or softener makes sense for your address, because a unit installed with no thought to scale will not reach the lifespan that justified the upgrade. Garage and exterior wall installs are common across the county, and an outdoor unit in a coastal breeze off Ocean Beach or Pacific Beach lives a harder life than one in Santee. Older stock in North Park, Normal Heights and parts of La Mesa still holds galvanised supply lines, which is where the repiping side of the work comes in.

Before hiring, get the estimate itemised. The company says onsite estimates are free on most jobs and quotes pricing by phone rather than publishing figures, so the sensible move is to have the written scope name the heater model, the gas line work, the venting materials, whether a recirculation pump is included, and who pulls the permit. Water heater replacements in the City of San Diego generally require a permit and inspection; confirm in writing that it is handled. Check that license 1001502, published on the company's website, is active and correctly classified on the California State License Board site, and ask for a current certificate of insurance. Manufacturer warranties on tankless units are often ten years or more on the heat exchanger but usually depend on correct installation and documented maintenance, so ask what labour warranty sits on top and how long it runs.

Compared with the larger San Diego plumbing brands, promax tankless water heaters and plumbing is a smaller and more focused operation. That usually means talking to someone who will be on the job rather than a dispatcher, at the cost of round-the-clock availability and a bench of trucks for same-day everything. For heater work, that trade is often worth making.

About This Business Profile

Last reviewed

September 2026

Profile last updated

September 27, 2026

Google review data updated

September 27, 2026

Reviewed by

Dana Whitfield, Senior editor, home services

Sources checked

Issuing authorities, Google Business Profile, Company website

Sponsorship status

No commercial relationship