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ContractorsRanked

Emergency Plumbers in Ancaster, ON (2026)

Top 50 of 342 plumbers, in emergency orderUpdated 0 paid placements in this rankingHow we rank

25 of the 50 plumbers on this list post 24/7 hours. 24/7 businesses come first, then same-day, each ranked by CR Score with availability weighted higher.

Burst pipe or major leak: shut off the main water valve first. If water reaches outlets or the panel, stay clear and call 911.

The short answer

  1. 1

    #1 for emergency plumbing in Ancaster: Drain Unit, open 24/7.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

Top emergency plumbers in Ancaster at a glance

Top emergency plumbers in Ancaster at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Drain Unit895.0★ (172)Hamilton, 6 km away24/7
2PLUMBER ON DEMAND of ANCASTER, ON894.8★ (168)Ancaster24/7
3PLUMBER ON DEMAND of HAMILTON, ON895.0★ (162)Hamilton, 6 km away24/7
4PlumbWize Plumbing Hamilton894.8★ (127)Ancaster24/7
5Greg's Plumbing and Heating Inc.884.6★ (186)Ancaster24/7
6Reliance Heating, Air Conditioning & Plumbing884.8★ (27,515)Burlington, 22 km away24/7
7In-Out Plumbing Inc885.0★ (190)Hamilton, 17 km away24/7
8Hy-Pro Plumbing & Drain Cleaning of Hamilton-Dundas874.8★ (89)Burlington, 6 km away24/7
9Lakeview Plumbing Services875.0★ (233)Hamilton, 23 km away24/7
10Mr. Rooter Plumbing of Hamilton874.6★ (138)Hamilton, 6 km away24/7

Call an emergency plumber in Ancaster now

24/7 hours mean the business says its phone is answered around the clock. Arrival time depends on where the crew is. Ask for an arrival window when you call.

The 50 emergency plumbers in Ancaster, ranked

24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights. The full ranking of all 342 is on the plumbers page.

Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  1. Ranked #1 in Ancaster

    #1 Drain Unit

    Based in Hamilton, 6 km away

    89/100CR Score

    Ranked #1 because of its Google rating and availability: 5.0★ from 172 Google reviews, open 24/7.

    • 5.0★ from 172 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    500 Stone Church Rd W, Hamilton, ON L9B 1R2
    View profile for Drain Unit(647) 963-1420

  16. #16 Flow Plumbing

    Based in Hamilton, 13 km away

    86/100CR Score

    Ranked #16 because of its Google rating and availability: 5.0★ from 55 Google reviews, open 24/7.

    • 5.0★ from 55 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    36 Albert St, Hamilton, ON L8M 2X9
    View profile for Flow Plumbing(905) 981-5010

  22. #22 a Rescue Rooter

    Based in Hamilton, 20 km away

    86/100CR Score

    Ranked #22 because of its Google rating and availability: 4.7★ from 224 Google reviews, open 24/7.

    • 4.7★ from 224 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    440 Lake Ave N, Hamilton, ON L8E 3C2
    View profile for a Rescue Rooter(905) 521-8284

Top 50 of 342 plumbers by emergency score

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile.

plumbers in Ancaster, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Loc-Roc Plumbing865.0★ (43)14 km
27Reliance Heating, Air Conditioning & Plumbing864.8★ (4,116)22 km
28The Super Plumber - Hamilton864.7★ (78)12 km
29BRH Plumbing865.0★ (24)8 km
30Mountain Grove Plumbing & Drains864.9★ (100)20 km
311-Tom-Plumber865.0★ (257)33 km
32Howe 2 Plumbing865.0★ (32)12 km
33Civic Plumbing865.0★ (68)20 km
34Hy-Pro Plumbing & Drain Cleaning of Brantford864.6★ (500)24 km
35Water Pro Drain865.0★ (62)19 km
36John The Plumber854.7★ (207)22 km
37RESOLUTION PLUMBING855.0★ (15)7 km
38Rosedale Plumbing of Hamilton855.0★ (16)8 km
39MacRory Plumbing Inc.855.0★ (111)28 km
40Drain Rescue Plumbers Hamilton855.0★ (19)11 km
41Brooksey's Plumbing854.7★ (51)15 km
42ProResults Plumbing Oakville – Residential & Commercial Services855.0★ (117)30 km
43Harb Plumbing854.6★ (221)24 km
44Reliance Heating, Air Conditioning & Plumbing854.7★ (9,230)33 km
45Aquasetic Plumbing & Drains854.9★ (108)28 km
46Mina Plumbing845.0★ (119)32 km
47Boonstra Heating and Air Conditioning844.7★ (4,641)12 km
48LT Plumbing & Drain Services Inc.845.0★ (24)17 km
49Bartlett Plumbing845.0★ (139)35 km
50Bos Plumbing And Drains Inc845.0★ (107)33 km

How we ranked emergency plumbers in Ancaster

Emergency lists move 10 points of the CR Score from reputation to availability: 25% and 20%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 plumbers are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed from
Reputation25%Bayesian-adjusted Google star rating
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2
Review volume10%log10(reviews + 1) against the list maximum
Recency10%Share of reviews from the last 12 months
Availability20%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radius
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)

Emergency plumbers in Ancaster: questions

Which plumbers in Ancaster are open 24/7?

25 on this list post 24/7 hours, including Drain Unit, PLUMBER ON DEMAND of ANCASTER, ON, PLUMBER ON DEMAND of HAMILTON, ON, PlumbWize Plumbing Hamilton and Greg's Plumbing and Heating Inc..

Who is ranked #1 for emergency plumbing in Ancaster, ON?

Drain Unit is #1, with a CR Score of 89 out of 100 on emergency weights.

How are emergency plumbers in Ancaster ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 25% and 20%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 plumbers are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

What should I do before the plumber arrives?

Burst pipe or major leak: shut off the main water valve first. If water reaches outlets or the panel, stay clear and call 911.

How many emergency plumbers here list a phone number?

25 of the 25 businesses ranked in full list a phone number. Tap Call to dial it.

Update log for Ancaster

  1. October 2026: CR Scores recalculated for 342 plumbers serving Ancaster.
  2. October 2026: 3 duplicate listings merged.

More emergency and plumbing pages