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Emergency Plumbers in St. Catharines, ON (2026)

Top 50 of 122 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 St. Catharines: Reliance Heating, Air Conditioning & Plumbing, 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 St. Catharines at a glance

Top emergency plumbers in St. Catharines at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Reliance Heating, Air Conditioning & Plumbing924.8★ (2,986)St. Catharines24/7
2PLUMBER ON DEMAND of THOROLD, ON895.0★ (115)Fort Erie, 14 km away24/7
3Mr. Furnace Heating and Air Conditioning894.8★ (2,672)St. Catharines24/7
4PLUMBER ON DEMAND of NIAGARA REGION, ON884.6★ (186)Fort Erie, 14 km away24/7
5Enercare884.6★ (2,788)St. Catharines24/7
6Plumr Plumbing & Heating874.9★ (121)Welland, 20 km away24/7
7All Pro Plumbing874.9★ (337)Tonawanda, 35 km away24/7
8Birnie Plumbing and Drains of St. Catharines864.4★ (14)St. Catharines24/7
9Lakeview Plumbing Services865.0★ (233)Hamilton, 38 km away24/7
10Sewer pro plumbing865.0★ (160)Fort Erie, 34 km away24/7

Call an emergency plumber in St. Catharines 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 St. Catharines, 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 122 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.

  5. #5 Enercare

    Based in St. Catharines

    88/100CR Score

    Ranked #5 because of its Google rating and availability: 4.6★ from 2,788 Google reviews, open 24/7.

    • 4.6★ from 2,788 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    30 Hannover Dr, St. Catharines, ON L2W 1A3
    View profile for Enercare(905) 225-1107

  7. #7 All Pro Plumbing

    Based in Tonawanda, 35 km away

    87/100CR Score

    Ranked #7 because of its Google rating and availability: 4.9★ from 337 Google reviews, open 24/7.

    • 4.9★ from 337 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    561 Main St # 1000, Tonawanda, NY 14150, United States
    View profile for All Pro Plumbing(716) 825-7767

  17. #17 Morgan Plumbing

    Based in Grand Island, 29 km away

    84/100CR Score

    Ranked #17 because of its Google rating and availability: 4.9★ from 45 Google reviews, open 24/7.

    • 4.9★ from 45 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2565 Fix Rd, Grand Island, NY 14072, United States
    View profile for Morgan Plumbing(716) 773-1994

  23. #23 AJ ROOTER

    Based in St. Catharines

    84/100CR Score

    Ranked #23 because of its Google rating and availability: 5.0★ from 4 Google reviews, open 24/7.

    • 5.0★ from 4 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    10 Woodbriar Cir, St. Catharines, ON L2S 3K3
    View profile for AJ ROOTER(905) 651-3554

Top 50 of 122 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 St. Catharines, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Jeff jrs plumbing and bathroom renovations835.0★ (5)14 km
27Superior Plumbing & Heating of Niagara Falls824.6★ (64)13 km
28Ideal Plumbing & Heating824.3★ (39)6 km
29The Reliable Plumber of Welland825.0★ (10)21 km
30Roto-Rooter Plumbing & Water Cleanup824.7★ (38)39 km
31Royal Flush Plumbing & Renovations814.4★ (85)40 km
32Heinz Maier Plumbing, Inc.815.0★ (11)33 km
33Trinity Plumbing Niagara815.0★ (44)11 km
34Rooter-Man Drain Service Fort Erie814.7★ (16)37 km
35WorryFree Home Services814.6★ (21)39 km
36Wright Family Plumbing LLC814.8★ (28)37 km
37Chippawa Plumbing & Heating805.0★ (4)21 km
38Bright Star Plumbing and Contracting805.0★ (3)21 km
39Pappas Plumbing805.0★ (8)39 km
40AB & N Plumbing804.7★ (10)39 km
41Invicta Handyman795.0★ (10)6 km
42Greg's Plumbing and Heating Inc.795.0★ (5)16 km
43Military Mechanical, Plumbing - Heating - Cooling794.9★ (50)39 km
44Budget Plumbing782.8★ (15)34 km
45Morosin Renovations Inc.785.0★ (101)39 km
46Volpatti Mechanical785.0★ (17)19 km
47Scott Best Sewer Services784.9★ (72)22 km
48Superior Plumbing & Heating of Fort Erie784.6★ (43)39 km
49Ken's Plumbing Services783.3★ (3)32 km
50H.W. Bryk and Sons774.3★ (75)21 km

How we ranked emergency plumbers in St. Catharines

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 St. Catharines: questions

Which plumbers in St. Catharines are open 24/7?

25 on this list post 24/7 hours, including Reliance Heating, Air Conditioning & Plumbing, PLUMBER ON DEMAND of THOROLD, ON, Mr. Furnace Heating and Air Conditioning, PLUMBER ON DEMAND of NIAGARA REGION, ON and Enercare.

Who is ranked #1 for emergency plumbing in St. Catharines, ON?

Reliance Heating, Air Conditioning & Plumbing is #1, with a CR Score of 92 out of 100 on emergency weights.

How are emergency plumbers in St. Catharines 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 St. Catharines

  1. October 2026: CR Scores recalculated for 122 plumbers serving St. Catharines.

More emergency and plumbing pages