9 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Sunnyside: Sunnymex Septic & Drain, LLC, CR Score 60/100; 4.3★ from 12 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): Shadow Mountain Septic and Plumbing LLC, posts 24/7 hours; ranked #4 of 9.
Most-reviewed: All Valley Plumbing, 68 Google reviews at 5.0★, the most of 9 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
9 Sunnyside plumbers are ranked here by CR Score, from ten published factors. 1 is open 24/7, 3 open Saturdays and 3 open Sundays, based on posted hours. The median Google rating is 4.6★ across 9 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Sunnymex Septic & Drain, LLC | 60 | 4.3★ (12) | Sunnyside | Sat · Sun · Evenings | Overall |
| 2 | Sunnymex Septic & Drain LLC | 57 | 4.1★ (16) | Prosser, 13 mi away | Sat · Sun · Evenings | — |
| 3 | All Valley Plumbing | 57 | 5.0★ (68) | Yakima, 25 mi away | — | Most reviews |
| 4 | Shadow Mountain Septic and Plumbing LLC | 56 | 4.8★ (16) | West Richland, 25 mi away | 24/7 | Emergencies |
| 5 | Bos Refrigeration - Heating and Air Conditioning | 56 | 4.6★ (12) | Sunnyside | — | — |
| 6 | Coy's Plumbing | 54 | 4.0★ (29) | Prosser, 13 mi away | — | — |
| 7 | 1st Choice Plumbing & Repair LLC | 53 | 4.6★ (27) | Selah, 23 mi away | — | — |
| 8 | Sals Pump Services | 53 | 5.0★ (5) | Prosser, 15 mi away | — | — |
| 9 | Adrian's Pro Plumbing LLC | 52 | 4.8★ (8) | Richland, 22 mi away | — | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and trade focus: 4.3★ from 12 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Prosser, 13 mi away
Ranked #2 because of its Google rating and trade focus: 4.1★ from 16 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Yakima, 25 mi away
Ranked #3 because of its Google rating and review volume: 5.0★ from 68 Google reviews, the most in Sunnyside.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in West Richland, 25 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 16 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sunnyside
Ranked #5 because of its Google rating and trade focus: 4.6★ from 12 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Prosser, 13 mi away
Ranked #6 because of its Google rating and trade focus: 4.0★ from 29 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Selah, 23 mi away
Ranked #7 because of its Google rating and trade focus: 4.6★ from 27 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Prosser, 15 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Plumber”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Richland, 22 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 8 Google reviews, listed on Google as “Plumber”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
National price ranges in USD, not adjusted for Sunnyside. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Water heater replacement | $882 | $1,348 | $1,826 | Per unit, installed (unit plus labor); typical range of customer-reported jobs. US national range | October 2026 |
In Washington, Washington State Department of Labor & Industries licenses Contractor registration and plumber certificates.
No chip usually means we have not matched a state record yet. Check the lookup yourself before you hire.
Guide checked October 2026. How we verify licenses
We scored 9 Sunnyside plumbers on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Sunnyside data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |