Find Nearby Plumbers In Glendora, California

Diver Dan's plumbing service demonstrates consistently strong performance across all four dimensions. Professionalism is a standout strength, with multiple reviews explicitly praising punctuality, responsiveness (same-day service), communication clarity, and attention to detail. Pricing is positioned as fair and reasonable relative to competitors, with transparent quotes and no upselling tactics. Project completion is reliable, with jobs finished properly on the first attempt and emergency calls honored immediately. Technical expertise is evident through problem-solving ability and quality workmanship. The 15-year customer relationship and repeated recommendations reinforce trust and follow-through.

• All 7 reviews are 5-star ratings with no negative feedback or critical comments — this is atypical and warrants caution. While not definitive proof of fake reviews, the complete absence of any criticism or nuance is unusual.
• Review dates span 2018–2023, with most concentrated in 2021–2023. Older reviews (2018–2019) are less recent but still within acceptable range.
• Some reviews use similar phrasing ('honest,' 'professional,' 'fair prices') but this appears consistent with genuine customer experience rather than templated language.
• No negative or mixed reviews present — consider seeking additional independent verification or recent reviews to validate this uniformly positive profile.

This WW Score of 89.3 is based on solid evidence across all four dimensions with HIGH confidence, but the complete absence of any critical feedback or lower ratings introduces moderate caution; the score should be considered reliable for general guidance, but independent verification of recent work is recommended before committing to major projects.

Hydro Backflow demonstrates strong performance across all four dimensions with consistently high marks. Professionalism stands out with 8 mentions highlighting responsive communication, punctuality, and courteous service from staff members like Alex and Hunter. Pricing receives strong marks across 6 reviews, with customers repeatedly noting competitive rates and honest cost assessments compared to competitors. Project completion is solid with 7 mentions confirming timely service delivery and follow-through on commitments. Technical experience is evident in 5 reviews describing skilled problem-solving and clear customer education. All reviews are 5-star ratings with specific, credible details rather than generic praise.

• All 10 reviews are 5-star ratings with no negative feedback—this is unusual and warrants caution. However, reviews contain specific details (named staff members Alex and Hunter, specific scenarios like failed tests and repairs, concrete pricing comparisons) that suggest authenticity rather than fake reviews.
• Most reviews are from 2018 (7 of 10), with only 2 reviews from 2022-2023. This age distribution limits confidence in current service quality and may not reflect recent operational changes.
• Backflow testing is a specialized, regulated service with limited customer base, which may naturally result in higher satisfaction rates and repeat positive reviews.

This WW Score of 89.2 is reliable for assessing historical performance on backflow testing services, but the age of most reviews (2018) and lack of negative feedback suggest caution when extrapolating to current service quality; recent reviews (2022-2023) should be prioritized for current expectations.

Isaac & Sons Plumbing demonstrates exceptional performance across all four dimensions. Professionalism is the strongest area, with 87 mentions highlighting punctuality, courteous demeanor, responsiveness, and clean work practices. Project completion is consistently praised with 79 mentions confirming jobs finished on time, callbacks honored, and thorough follow-through. Experience is well-documented across 68 mentions, with customers repeatedly noting technical skill, problem-solving ability, and knowledgeable workmanship. Pricing receives strong marks (85.0) across 42 mentions, with customers frequently noting fair quotes, transparency, and value compared to competitors. The single 1-star review from January 2021 regarding a garbage disposal installation failure and lack of responsiveness for 9+ months represents a significant outlier but is substantially outweighed by 100 positive reviews.

• One critical negative review (1-star, Jan 2021) alleging incomplete work on garbage disposal installation, failure to reattach drain pipe, improper wiring, and non-responsiveness for 9 months. This contradicts the overwhelming pattern of positive feedback and suggests either an isolated incident or potential service quality inconsistency.
• One 2-star review (Mar 2018) citing slower-than-advertised emergency response on Sunday night and pricing concerns, though acknowledging the work was completed satisfactorily. This suggests occasional gaps in 24/7 emergency service claims.
• One blank review with 5-star rating (Jun 2020) contains no text and cannot be evaluated.
• Majority of reviews (approximately 60%) are from 2017-2019, with fewer recent reviews from 2024-2025 (approximately 8 reviews). Recency bias suggests current performance may differ from historical data, though recent reviews available are uniformly positive.
• No evidence of fake review patterns detected. Reviews contain specific details, varied language, named technicians (Isaac, Christian, Joseph, Mark, Matthew, Jeff, Nick, Mike), and realistic problem descriptions. Positive sentiment is justified by concrete examples.

This WW Score of 88.2 is highly reliable, based on 100 usable reviews with strong data across all four dimensions (42-87 mentions each). However, the single critical failure case from 2021 and slower emergency response incident warrant caution; prospective customers should verify current service standards and request written guarantees for callback responsiveness. The score reflects historical performance with a slight discount for the 2021 incident and recency gap.

Klein Plumbing demonstrates consistently strong performance across all four dimensions, with particularly notable strength in professionalism (89.5) driven by 26 mentions of punctuality, responsiveness, politeness, and communication. Pricing scores 87.0 based on 19 explicit mentions of fair pricing, competitive quotes, and no overcharging. Project completion (87.5) is supported by 22 mentions of finished work, same-day service, and follow-through on commitments. Experience (88.0) reflects 20 mentions of skilled workmanship and problem-solving ability. The single 1-star review from 2015 regarding false 24-hour advertising claims is an outlier among 32 five-star reviews and does not materially impact the overall score given the volume of positive data.

• One review (2022-09-21) contains identical duplicate text within the same review, suggesting possible copy-paste error by reviewer rather than fake review pattern
• 32 of 33 reviews are 5-star ratings with only one 1-star review; while this is skewed, the positive reviews contain specific, detailed examples (drain unclogging, water heater replacement, re-piping projects, etc.) rather than generic praise, reducing fake review suspicion
• Most reviews are older than 12 months (only 2 reviews from 2023-2022); only 2 reviews from past 12 months. Recency is limited but historical consistency is strong
• Multiple reviews mention confusion with similarly-named competitor 'Kline Plumbing,' which is a legitimate business distinction issue rather than a quality concern

This WW Score of 88.2 is highly reliable, supported by 33 reviews with consistent data across all four dimensions and high mention counts (19-26 per dimension). The score reflects genuine customer satisfaction with specific, verifiable examples of work quality and service delivery, though the age of most reviews (pre-2023) and the extreme skew toward 5-star ratings warrant noting that this represents historical performance rather than current real-time service levels.

Verity Plumbing demonstrates strong performance across all dimensions with particularly high marks for professionalism and project completion. The team consistently receives praise for responsiveness, punctuality, courteous behavior, and technical expertise. Raul and his team are frequently mentioned by name with specific examples of going above and beyond (40-mile drive for a key, 14-hour weekend work, minimizing home damage). The primary weakness is pricing, where one 2-star review explicitly criticized charges as unjustified, and several positive reviews mention 'reasonable' pricing rather than exceptional value. Most reviews are recent (past 12 months), strengthening confidence in the score.

• One negative review (2-star, 2018-04-19) explicitly criticizes pricing as 'ridiculous' with no justification provided, creating a notable outlier in an otherwise uniformly positive dataset.
• The dataset is heavily skewed toward 5-star reviews (23 of 25 reviews are 5-star), which is typical for contractor reviews but warrants noting that negative experiences may be underrepresented.
• Pricing dimension has limited mentions (8) compared to other dimensions; most positive reviews mention pricing as 'reasonable' or 'very reasonable' but lack specific detail about value comparison.
• One review (2024-08-17) is anecdotal and not work-related (chair offered at restaurant), though it does speak to character; included in professionalism scoring as it reflects personal conduct.
• Most reviews are from 2022 onward (18 of 25), with older reviews (2017-2020) also positive; recency bias is minimal as performance appears consistent over time.

This WW Score of 87.2 is highly reliable, based on 25 reviews with strong consistency across dimensions and high mention counts (13-19 per dimension). The primary caveat is the pricing dimension, which relies on only 8 mentions and shows mixed signals (mostly 'reasonable' praise but one explicit complaint about overcharging). The overwhelming positivity (92% five-star reviews) suggests either genuinely excellent service or potential selection bias in review submission, but specific details across reviews (named staff, project descriptions, timeline specifics) indicate authentic customer experiences rather than fabricated reviews.

The Sewer Surgeon demonstrates strong overall performance with a WW Score of 84.2. Professionalism is a clear strength (87.5), with extensive evidence of punctuality, courteous technicians, and responsive communication across 89 reviews. Project completion scores well at 83.5 based on 72 mentions, though several reviews document incomplete follow-through on promised callbacks and warranty work. Experience is solid at 85.0 with 58 mentions highlighting skilled technicians and effective problem-solving. Pricing is adequate at 82.0 but shows more variability—while many customers praise fair rates, some report significant cost surprises and aggressive upselling. The company's performance is notably consistent across most dimensions, though reliability issues and follow-up failures in a subset of reviews prevent a higher score.

• POTENTIAL FAKE REVIEW PATTERN: Multiple reviews dated 2022-06-10 and 2021-06-10 with identical or near-identical phrasing (e.g., 'Good work all around. Good people and great service' appears twice; 'Awesome staff. First Bruce helped us with clogged sink. Then Ulisses helped us with heating' appears twice verbatim). Several reviews on these dates contain no substantive detail. This suggests possible review manipulation or bulk posting.
• CRITICAL FOLLOW-UP FAILURES: Review dated 2023-06-15 documents serious post-completion issues—customer was 'ghosted' after paying for pipe re-lining service; promised receipt, video inspection, and warranty documentation were never provided. Debris left on property. This is a significant project completion failure.
• ABANDONMENT AND NO-SHOW PATTERN: Multiple 1-star reviews (2023-10-26, 2023-06-10, 2022-08-23, 2020-04-28) document technicians failing to show up, not returning calls, or abandoning jobs mid-completion. One review (2023-10-26) alleges a technician did no work but charged the customer, then the company refused accountability.
• INCOMPLETE WORK NOT RESOLVED: Review dated 2021-05-12 reports hardware finish mismatch (chrome vs. gold) promised to be corrected for 5+ months with no resolution despite full payment and multiple follow-up attempts. Customer filed complaint with Contractors State License Board.
• PRICING TRANSPARENCY CONCERNS: Review dated 2021-01-12 reports customer was quoted $3,200+ for concrete slab breaking to access drain, but customer resolved issue independently with Drano for minimal cost. Suggests potential over-specification of repairs.
• RECENCY NOTE: Most reviews are from 2020-2022 (bulk dated 2022-06-10 and 2021-06-10). Only ~15 reviews are from 2024-2025. Recent reviews show mixed results with both strong performance and serious failures (2023-10-26 abandonment case is particularly damaging).
• INCONSISTENT MANAGER ACCOUNTABILITY: Review dated 2023-10-26 alleges manager was 'extremely rude' and refused to take responsibility for technician's abandonment, claiming technician 'ripped them off' while simultaneously denying the company's liability to the customer.

This WW Score of 84.2 should be treated with MODERATE-TO-HIGH caution. While the company demonstrates genuine strengths in professionalism and responsiveness across a large sample, the presence of suspected fake reviews (multiple identical reviews on specific dates), documented project completion failures, and a pattern of no-shows and follow-up abandonment in recent years significantly undermine confidence. The score reflects strong average performance but masks serious reliability issues that affect a meaningful subset of customers. Prospective customers should prioritize getting detailed written agreements and follow-up commitments in writing before engaging this company.