Knockout Plumbing & Repipe Inc.
Plumber · San Jose, CA · Open 24 hours per Google listing
Our verdict
4.9 stars from 333 reviews; all 5 sampled are 5-star — communication=2, professional=3; 25-year transferable warranty on drain replacement, permit acquisition included, and drywall restoration post-job.
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 ↗
Lists 24-hour service on its Google profile — and reviewers describe after-hours calls.
Only 5 reviews analyzed — treat this assessment as a first impression, not a track record.
What reviewers praise
25-year transferable warranty with permit acquisition: Knockout outbid 3 competitors and included permits plus drywall restoration on a 70-year-old house drain replacement.
1 cited review
“They offered a 25 year transferable warranty, they acquired and arranged for permits. They also put back the dry wall that they had to remove. We looked it up and their life range is about 70 years so we bit the bullet and got estimates from 4 different companies.”
Whole-building repipe for multi-unit residential: most cost- and time-efficient of 6 companies quoted — coordinated with tenants, worked late to meet promised timeline.
1 cited review
“Knockout is the most cost and time efficient repiping company among all of them. Their pricing is reasonable and they know what they are doing. Those guys kept their promises of the project timing despite of working late.”
Root-cause diagnosis philosophy: Jason aimed for root cause not symptoms, providing sincere and patient attitude during free crawl space estimate.
Cited in 1 of the 5 reviews we analyzed.
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
“Our master bath tub was not draining and nothing seemed to help unclog it. We were referred to Knockout plumbing and they were immediately responsive. Martin came to the house, gave us a quote and his crew was available to do the job on the same day! They were professional, courteous and got the job done quickly. One of the most impressive things they did was to wear shoe covers while in our house to minimize any …”
“Jason and his team worker came to have the free estimate for my crawl basement issues is rainwater seepage . He is professional, easy to communicate with. Best thing is Jason aimed for the root cause, not just the symptoms of current issues having a sincere and patient attitude. Thank you!”
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 333 reviews so far. Treat this as a first read.
Newest review in our sample: Mar 2026.
Should you hire Knockout Plumbing & Repipe Inc.?
Best for
- Emergency and same-day calls
- Budget-conscious homeowners
- Complex installs and remodels
- Whole-house repiping
- Sewer line repair and replacement
Hire if
- You need high-quality work that holds up over time
- You need a plumber who actually shows up when scheduled
Think twice if
- You need guaranteed sub-hour response for true emergencies
- You need rock-bottom prices with zero flexibility on the quote
Advice derived from the review analysis above — how we decide.
Own Knockout Plumbing & Repipe Inc.?
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
Knockout Plumbing & Repipe Inc.isn't in one of our ranked city guides yet — the nearest covered markets are below.
Nearby: Saratoga · San Jose · Stanford · Ben Lomond