+
By CR Score, the highest-ranked plumber in Washington, IL is Roto-Rooter Plumbing, Drain, & Water Damage Cleanup Service with a CR Score of 91/100. It has 4.8★ from 1,117 Google reviews. It is open 24/7. A & B Hunter Sewer Service Co (#2) and Arnold & Sons Plumbing, Sewer & Drain (#3) follow. We ranked 78 plumbers on 8 factors, last updated October 22, 2026.
+
ContractorsRanked ranks 78 plumbers serving Washington, IL. 8 of them are based in Washington; the rest serve it from nearby towns. Another 17 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
+
17 ranked plumbers in Washington post 24/7 hours. The highest-ranked are Roto-Rooter Plumbing, Drain, & Water Damage Cleanup Service (#1), A & B Hunter Sewer Service Co (#2) and Arnold & Sons Plumbing, Sewer & Drain (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
+
23 of 78 ranked plumbers post Saturday hours and 21 post Sunday hours. The highest-ranked open Saturdays are Roto-Rooter Plumbing, Drain, & Water Damage Cleanup Service (#1), A & B Hunter Sewer Service Co (#2) and Arnold & Sons Plumbing, Sewer & Drain (#3). Posted hours are office hours; crews may book weekend jobs separately.
+
In Illinois, Illinois Department of Public Health, Plumbing Program handles licensing and covers Plumber licenses and plumbing contractor registration (Chicago licenses its own plumbers).
+
Water heater replacement typically costs $882 to $1,826, with $1,348 typical (Per unit, installed (unit plus labor); typical range of customer-reported jobs. US national range). This is a national range, not adjusted for Washington. Prices were last checked October 2026. Get at least two written quotes before you hire.
+
The median Google rating among 78 rated plumbers in Washington is 4.7★, with a median of 28 reviews. Arnold & Sons Plumbing, Sewer & Drain has the most, 1,806 reviews, and ranks #3. We adjust ratings for review count, so a few five-star reviews cannot top the list.
+
Each plumber gets a 0–100 CR Score from 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.