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Backflow Prevention Specialists vs Comet Plumbing And Sewer
Santa Clara Plumbing Contractors Comparison · Updated March 2026
This comes down to whether you need specialized backflow expertise or a full-service plumber who can handle your entire plumbing system.
| Backflow Prevention Specialists | Comet Plumbing And Sewer | |
|---|---|---|
| Rating | ★ 4.5 | ★ 4.9 |
| Years Licensed | 43 years | 15 years |
| License # | 427328 | 951887 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Sunnyvale, CA | Sunnyvale, CA |
| Website | www.backflow-prevention.com | www.call-comet.com |
Key Differences
What Customers Say
Backflow Prevention Specialists
Customers highlight responsive scheduling, knowledgeable staff answering technical questions, and convenient parts inventory access for backflow-specific needs.
Comet Plumbing And Sewer
Customers consistently praise rapid response times (often same-day), clear communication with detailed problem explanations, and fair pricing across diverse plumbing projects.
Key Takeaway: Backflow Prevention Specialists earns recognition for specialized knowledge and parts availability, while Comet Plumbing stands out for speed of service and broad project versatility with direct owner involvement.
Customer Reviews
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...
Comet Plumbing And Sewer
Comet plumbing did a excellent job at my home . A fair price, competent, knowledgeable, efficient , clean and professional! Thank you Andy, I will be calling you for future issues if needed.
We had a drain issue right around the holidays and Andrew fixed it that same day. He and his team have always done great work at a fair price!
Andrew from Comet Plumbing was wonderful! He helped install two clean-outs and fixed a root infested pipe for a reasonable price (plus nice discount). I'll definitely be using them again!
Consider Backflow Prevention Specialists if...
- ✓ You need backflow assembly testing, certification, repair, or replacement specifically and want a contractor who handles nothing but this specialized work daily
- ✓ You're seeking immediate access to backflow parts inventory rather than waiting for a general plumber to source components
- ✓ Your project involves complex backflow compliance questions or training needs where 43 years of focused experience provides additional reassurance
- ✓ You're willing to obtain multiple quotes since customer feedback indicates pricing can vary significantly compared to competitors
Consider Comet Plumbing And Sewer if...
- ✓ Your plumbing needs extend beyond backflow work to include drains, water heaters, fixtures, pipes, or sewer lines requiring a full-service contractor
- ✓ You need fast response time, potentially same-day service, or weekend availability for urgent plumbing issues
- ✓ You prefer working directly with the business owner who will be handling your project personally rather than assigned staff
- ✓ You want a contractor with consistent feedback about fair pricing and competitive rates across diverse residential plumbing work
Questions to Ask Before Hiring
- → For Backflow Prevention Specialists: Request itemized quotes for your specific backflow work and ask how their pricing compares to general plumbers who also handle backflow services
- → For Comet Plumbing: If you need backflow testing or certification, ask about their experience with backflow assemblies specifically and whether they stock common replacement parts
- → Ask both contractors how quickly they can schedule your particular project and what their typical turnaround time is for the work you need completed
The Bottom Line
If you need backflow testing, certification, or assembly work exclusively, Backflow Prevention Specialists offers deep expertise—but get multiple quotes since their pricing may not be competitive. For nearly any other plumbing need, or if you want one contractor handling both backflow and general plumbing work, Comet Plumbing provides veteran experience, fast response times, owner involvement, and consistently fair pricing across a full range of residential services. Most homeowners will find Comet's comprehensive approach more practical unless they're facing specialized backflow compliance challenges.
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Frequently Asked Questions
Most licensed plumbers can perform backflow testing and basic repairs, but Backflow Prevention Specialists operates exclusively in this area with specialized certification training facilities. If your need is straightforward backflow testing, either could likely handle it. For complex backflow compliance issues or if you're seeking certification training yourself, the specialist focus becomes more relevant.
You might not need to—customer feedback suggests Backflow Prevention Specialists' pricing can actually be higher than competitors for similar backflow work. The advantage is their parts inventory, dedicated expertise, and training resources. Get quotes from both types of contractors to compare actual pricing and scope of service for your specific situation.
For straightforward plumbing repairs or replacements, 15 years represents substantial veteran experience. The additional 28 years matters most if you're dealing with unusual backflow compliance scenarios or older, uncommon backflow assemblies where institutional knowledge helps. For typical residential plumbing work, both contractors have veteran-level experience.
Not necessarily. Comet Plumbing handles diverse plumbing projects including backflow-related work. Using one contractor for multiple needs often simplifies coordination and may reduce overall costs. However, if your backflow situation is particularly complex or you need specialized parts immediately, the dedicated specialist might be worth coordinating separately.
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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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