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Allstar Plumbing vs Backflow Prevention Specialists
Santa Clara Plumbing Contractors Comparison · Updated March 2026
Allstar Plumbing handles all general plumbing needs while Backflow Prevention Specialists focuses exclusively on backflow testing and equipment.
| Allstar Plumbing | Backflow Prevention Specialists | |
|---|---|---|
| Rating | ★ 4.8 | ★ 4.5 |
| Years Licensed | 29 years | 43 years |
| License # | 732611 | 427328 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | San Jose, CA | Sunnyvale, CA |
| Website | goallstar.com | www.backflow-prevention.com |
Key Differences
What Customers Say
Allstar Plumbing
Customers consistently praise Allstar's rapid response times with technicians arriving within an hour, along with professional service and clear communication across diverse plumbing projects.
Backflow Prevention Specialists
Customers recognize Backflow Prevention Specialists' specialized expertise and parts availability, though some note pricing concerns compared to competitors in the same niche.
Key Takeaway: Allstar receives feedback about emergency response speed and versatility across many project types, while Backflow Prevention Specialists' reviews focus entirely on their narrow specialty and potential pricing premiums.
Customer Reviews
Allstar Plumbing
Great job Luis I give a 10
Joe L. Provided a great services and very satisfied with the work he did.
Joe was a great technician that new his job very well. He did a great job in letting us know what was happening with all of the repairs. You have a great company that is very helpful and professional....
Backflow Prevention Specialists
The Best place to go for all your backflow needs.
They always have the backflow repair parts I need in stock! Also if I have any questions, they are very knowledgeable and helpful.
Best of the best. Other companies are horrible at scheduling/ communication/ and price. BPS are very honest, scheduling is simple, communication is top notch. New backflow on the side of HWY 17, no ne...
Consider Allstar Plumbing if...
- ✓ You need general plumbing services like leak repairs, drain clearing, water heater installation, toilet repairs, or fixture replacements
- ✓ You have a plumbing emergency requiring same-day service, as customers consistently report technicians arriving within an hour
- ✓ Your project involves gas line installation or modification alongside other plumbing work
- ✓ You want a contractor who can handle multiple plumbing needs during a single service call rather than coordinating specialists
Consider Backflow Prevention Specialists if...
- ✓ You specifically need backflow prevention assembly testing to maintain annual compliance with your water district requirements
- ✓ Your backflow assembly needs repair or replacement and you want a contractor focused exclusively on this equipment
- ✓ You're looking for technical expertise and parts inventory specifically for backflow devices, as the company also functions as a supply resource
- ✓ You need certification training for backflow prevention, as they operate a training facility
Questions to Ask Before Hiring
- → For Backflow Prevention Specialists: Request detailed pricing upfront and consider getting competitive quotes from other backflow specialists, as customer feedback indicates pricing varies significantly
- → For Allstar Plumbing: If your property requires annual backflow testing, ask whether they perform this specialized service or if you'll need a separate contractor
- → For either company: Confirm response times and scheduling availability for your specific project timeline and urgency level
The Bottom Line
This comparison only makes sense if you need backflow prevention services specifically. For any general plumbing need—emergency repairs, installations, drain clearing, water heaters, fixtures, or gas lines—choose Allstar Plumbing, which demonstrates fast response times and handles the full range of residential plumbing work. Only contact Backflow Prevention Specialists if you specifically need backflow assembly testing, repair, or replacement for regulatory compliance. If that's your need, get competitive quotes from multiple backflow specialists given customer feedback about pricing variability.
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Frequently Asked Questions
The provided data doesn't indicate backflow prevention as part of Allstar's service offerings. If you need both general plumbing work and backflow assembly services, ask Allstar directly whether they handle backflow testing or if you'll need to hire Backflow Prevention Specialists separately for that specific compliance requirement.
No. Backflow Prevention Specialists focuses exclusively on backflow prevention assemblies and related equipment. For general plumbing repairs, installations, or emergencies, you need a full-service plumber like Allstar Plumbing.
Both are veteran contractors with decades of experience, so the experience gap matters less than the service focus. The meaningful difference is that Backflow Prevention Specialists' 43 years are concentrated entirely in backflow prevention, while Allstar's 29 years cover the full spectrum of residential and commercial plumbing.
Customer feedback indicates at least one instance where Backflow Prevention Specialists quoted substantially higher than a competitor for similar backflow assembly replacement. Specialized contractors sometimes charge premium pricing for expertise, but backflow testing and assembly work has become common enough that competitive bidding is advisable for larger projects.
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How We Compare Contractors
License Verification
All license data is sourced from official California CSLB records and verified regularly.
Review Analysis
Customer reviews are aggregated from Google and analyzed to identify patterns in service quality.
Detailed Comparison
We analyze credentials, insurance, experience, and feedback to highlight meaningful differences.
Not all licensed contractors are created equal. While a valid license is the baseline requirement in California, contractors can vary significantly in experience, insurance coverage, and customer satisfaction.
- Experience matters: A contractor with 15+ years of experience has likely encountered and solved problems that newer contractors haven't faced yet.
- Workers' compensation protects you: If a contractor without workers' comp insurance has an employee injured on your property, you could be held liable.
- Reviews reveal patterns: Individual reviews can be misleading, but patterns across many reviews often reveal a contractor's true strengths and weaknesses.
- Bond amounts vary: A contractor's bond provides financial protection if they fail to complete work as agreed. Higher bonds offer more protection.
Taking time to compare contractors on these factors can save you from costly mistakes and help ensure your project is completed by a qualified professional.
Data Sources: License information from California CSLB. Ratings and reviews from Google. Last verified March 12, 2026.
This comparison is based on publicly available information. We recommend getting multiple quotes and verifying all credentials directly before hiring.
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