CPI Service, Plumbing, Heating & Cooling
Plumber · Milpitas, CA · Open 24 hours per Google listing
Our verdict
4.9★ across 120 reviews; professional cited in 4 of 5 sampled reviews—Danny upgraded 5 water heaters with precision attention to detail; Bunhak completed HVAC and heating repairs while showing extra care to an Alzheimer's patient.
Scores are our editorial reading of published customer reviews — not a verification, license check, or guarantee.
Our opinion, based on the 5 reviews we analyzed from Google, Yelp and BBB · Analysis updated Jun 2026 · How we decide ↗
Advertises 24-hour service on its Google profile — no reviews we analyzed mention after-hours response either way.
Only 5 reviews analyzed — treat this assessment as a first impression, not a track record.
What reviewers praise
5 water heaters upgraded in a single job by Danny Harn with "attention to detail" called out specifically per 1 review.
1 cited review
“Danny Harn - doesn't get any better in terms of expertise and customer service. We had 5 water heaters that needed upgrading - his attention to detail is what made a huge impression and basically did whatever was needed to do an expert job.”
Bunhak completed both heating and AC jobs; additionally helped with doorbell repair at no charge per 1 review.
1 cited review
“Bunhak is very professional and respectful to my Alzheimer mother when working for fixing both my heating system and my AC. He even went out of his way help me with my door bell for free.”
Text message appointment confirmations with ETA updates cited in 1 review; both repair visits completed within 1 hour each.
1 cited review
“Both service reps were courteous and prompt. Text messages to confirm appointment and estimated time of arrival worked well.”
What reviewers report — the concerns
We looked for patterns of complaints in the 5reviews we analyzed and didn't find any. That's rare — but it's a reading of published reviews, not a guarantee.
The evidence — in reviewers' own words
Positive
“I had 2 plumbing repairs. Replacing water connectors to the washer and replacing shower cartridge. It took 2 visits; one for estimate and one for the repair. Both visits took about one hour. I called on Thursday and was able to get an appointment at 11 am and repair was completed on Monday. Both service reps were courteous and prompt. Text messages to confirm appointment and estimated time of arrival worked …”
“Thanks to CPI plumbing I was able to get my kitchen sink drain unclogged and a new garbage disposal installed as well as they replaced all the pipes under my sink. Special thanks to Charlie who spent the day making sure everything was up and running. Shamir was really helpful and so was Gerardo!”
Quotes are reproduced verbatim from public reviews on the platforms shown; we select which to feature, and selection reflects our editorial judgment. Report a quote that doesn't match its source ↗
The rating picture
Small sample — we've analyzed only 5 of 120 reviews so far. Treat this as a first read.
Newest review in our sample: Jan 2026.
Should you hire CPI Service, Plumbing, Heating & Cooling?
Best for
- Water heater install/repair
Hire if
- You need a plumber who actually shows up when scheduled
- You need high-quality work that holds up over time
Think twice if
- You need rock-bottom prices with zero flexibility on the quote
- You need guaranteed sub-hour response for true emergencies
Look elsewhere if
- You're highly price-sensitive
Advice derived from the review analysis above — how we decide.
Own CPI Service, Plumbing, Heating & Cooling?
You can respond to our analysis, correct business facts, or dispute the accuracy of a quoted review. Responses that check out get published on this page, and factual errors get corrected — see our corrections policy. We don't remove accurate quotes, but we'll re-run your assessment as your reviews change.
Find plumbers near you
CPI Service, Plumbing, Heating & Coolingisn't in one of our ranked city guides yet — the nearest covered markets are below.
Nearby: San Jose · Saratoga · Mount Hamilton · Morgan Hill