1Direct Waterproofing Inc
0.3 km from Markham centre
Sump Pumps & Backwater Valves
Its own website describes below-grade water work
Sump Pump & Backwater Valve Installers in Markham, Ranked (2026)
Last updated: By Below-Grade Records Desk
5 sump pump and backwater valve installers cover Markham, compiled August 2026.
672 Google reviews · median 4.86★ · typical $1,400–$2,400 per installed system (Tornado Plumbing & Drains (Toronto)) · 80% of rated companies at 4.8★ or above · scheduling: year-round; interior work is not weather dependent
Companies
Who does sump pump and backwater valve work in Markham?
- 1
2Superior Plumbing & Heating of Markham
3.6 km from Markham centre
Sump Pumps & Backwater ValvesIts own website describes below-grade water work
3RCC Waterproofing Markham
2.2 km from Markham centre
Sump Pumps & Backwater ValvesIts own website describes below-grade water work
4Preferred Plumbing Solutions Inc.
5.9 km from Markham centre
Sump Pumps & Backwater ValvesIts own website describes below-grade water work
5Everest Drain & Plumbing: Markham's Local Plumber
6.5 km from Markham centre
Sump Pumps & Backwater ValvesIts own website describes below-grade water work
August 2026 count for Markham: 5 sump pump and backwater valve installers, 4.86★ average on Google, 672 reviews in total. Half carry more than 49 Google reviews and half fewer. Full sump pumps & backwater valves cost guide.
Ranking
What decides the order on this page?
A Bayesian-adjusted Google rating orders these 5 sump pump and backwater valve installers, whose median review count is 49. 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 Markham and the rest of the GTA, so they are answered once, on the sump pumps & backwater valves page.
Coverage