1Vaillancourt Plumbing & Drains
78/100 WaterproofingIndex Score
0.6 km from Oshawa centre
Sump Pumps & Backwater Valves
- Says it is licensed
- Says it has been going since 1955
Its own website describes below-grade water work
Best Sump Pump & Backwater Valve Installers in Oshawa, Ranked (2026)
Last updated: By Below-Grade Records Desk
4 sump pump and backwater valve installers cover Oshawa, compiled August 2026.
1,563 Google reviews · median 4.9★ · typical $1,400–$2,400 per installed system (Tornado Plumbing & Drains (Toronto)) · scheduling: year-round; interior work is not weather dependent
Companies
Who does sump pump and backwater valve work in Oshawa?
- 1
2Caldwell Plumbing Oshawa
77/100 WaterproofingIndex Score
0.2 km from Oshawa centre
Sump Pumps & Backwater Valves- Says it is licensed
- Says it is insured
Its own website describes below-grade water work
3Oshawa Plumbing
75/100 WaterproofingIndex Score
0.4 km from Oshawa centre
Sump Pumps & Backwater Valves- Says it is licensed
- Says it is insured
Its own website describes below-grade water work
4Superior Plumbing & Heating of Oshawa
61/100 WaterproofingIndex Score
0.8 km from Oshawa centre
Sump Pumps & Backwater Valves- Says it is licensed
Its own website describes below-grade water work
Below are the 4 sump pump and backwater valve installers operating in Oshawa, whose Google ratings average 4.9★ over 1,563 reviews. The dataset was last rebuilt in August 2026. Half carry more than 65 Google reviews and half fewer. Full sump pumps & backwater valves cost guide.
Ranking
What decides the order on this page?
The WaterproofingIndex Score orders these 4 sump pump and backwater valve installers, whose median review count is 65. Position is not for sale. How the score is built.
Rules
Permits and subsidies for sump pump and backwater valve work
Permit rules and subsidies do not change between Oshawa and the rest of the GTA, so they are answered once, on the sump pumps & backwater valves page.
Coverage