Osmosis Reverse Water Filter
How an under-sink RO filter works stage by stage, what it removes and misses, when it is worth having on Durham Region tap water, and the upkeep it needs.
6 min read
Plumber Oshawa
Your trusted plumber in Oshawa
Hayes Plumbing & Bathroom Renovations is the plumber Oshawa has trusted since 1961, voted Platinum Winner for Plumbers and Plumbing in CommunityVotes Oshawa 2026, serving more than 10,000 clients from Newcastle to Pickering.
Free In-Home Estimates
Transparent pricing in writing before any work begins
24/7 Live Operator
A real person answers plumbing emergencies around the clock
Registered & Accredited
Registered plumbing technicians, WSIB certified and BBB accredited
Plumbing and bathroom services Durham Region counts on
From a dripping faucet to a full custom washroom, our registered plumbing technicians handle it with the same attention to detail. Here is what we do for homes and businesses across Oshawa, Whitby, Ajax, Pickering and Clarington.
Bathroom Renovations
Full bathroom renovations from a Durham Region family business since 1961, from tub-to-shower conversions to custom and accessible washrooms.
Accessible & Senior Bathrooms
Walk-in showers, walk-in tubs, grab bars, comfort-height toilets and in-law suites for aging in place. Senior discount available.
Appliance Installation
Dishwashers, refrigerator water lines and washing machines connected to code-compliant plumbing and tested for leaks.
CommunityVotes Oshawa 2026 Winners
Platinum, Gold and Silver in five categories
Voted by homeowners and businesses across our community in the 2026 CommunityVotes Oshawa campaign, in the Home, Builders and Contractors categories. Hayes Plumbing also won 2025 Readers' Choice awards for Best Plumbing in all five major communities we serve, including the top Diamond award in Oshawa, Ajax, Clarington and Pickering.
- Plumbers and PlumbingPlatinum winner
- Water ServicesPlatinum winner
- Bathroom SpecialistsGold winner
- Home Improvements and RenovationsSilver winner
- Kitchen SpecialistsSilver winner
Plumbing emergency? A live operator answers 24/7.
Our customers do not want to leave a message when they are facing a plumbing emergency. Call now and a registered plumbing technician is dispatched from Oshawa.
Oshawa plumbing and bathroom renovations, experience since 1961.
Located in the heart of Oshawa, Ontario, Hayes Plumbing & Bathroom Renovations is one of Durham Region's most trusted and experienced plumbing companies. Our experience is well rooted in the plumbing business, with our founder Brian Hayes having begun his career in Oshawa in 1961.
Today our family owned and operated business services more than 10,000 clients throughout Durham Region. Our reputation for customer service excellence and getting the job done right the first time stems from our meticulous attention to detail and well-trained professionals.
Learn more about us
10,000+
Clients from Newcastle to Pickering
7 vans
Fully stocked, serving homes and businesses throughout Durham Region
24/7
A real person answers emergency calls around the clock
WSIB · BBB
Licensed, WSIB certified, BBB accredited
Trusted brands and credentials
What Durham Region neighbours say
"Just had Hayes plumbing in to fix 2 clogged sinks in master bathroom and to fix 2 water taps in basement. I called, very pleasant on the phone and plumber was here quickly. He was courteous and professional and everything was done right! thank you for the great Job! definitely recommend Hayes Plumbing"
Duane N., Oshawa, ON · Drain cleaning
Proudly serving Durham Region
Based in Oshawa, we serve communities from Pickering to Newcastle and north to Port Perry and Uxbridge.
Planning a repair, renovation or urgent call?
Review our 2026 Oshawa plumbing cost guide for realistic price ranges before booking an estimate, or try the bathroom renovation cost estimator.
Plumbing tips and guides
Practical advice from our team to help you understand and care for your home's plumbing.
Reverse Osmosis Water Filtration
What certified reverse osmosis systems are tested to reduce, how RO compares with carbon filters and softeners, and what the Region of Durham's 2025 water report says about chlorine, fluoride, sodium, lead and hardness.
6 min read
Reverse Osmosis Water System
The parts of an under-sink RO setup, tank versus tankless units, the Ontario drain rule, and what installation, upkeep and cost look like with Hayes Plumbing.
6 min read
Frequently asked questions
Do not see your question? Call us and we will talk it through.
Yes. A live operator answers (905) 576-3043 24 hours a day, 7 days a week, and a registered plumbing technician is dispatched from our Oshawa shop to Oshawa, Whitby, Ajax, Pickering, Clarington, Bowmanville, Courtice, Newcastle, Port Perry and Uxbridge.
Yes. Hayes Plumbing is a licensed Ontario plumbing contractor, WSIB certified, BBB accredited and a member of the Greater Oshawa Chamber of Commerce.
Pricing depends on the service, access, parts and urgency. Our 2026 Oshawa plumbing cost guide lists planning ranges such as drain cleaning at $150 to $400 and water heater installation at $500 to $1,500, and every job is quoted in writing after a free in-home estimate.
All of Durham Region, from Newcastle to Pickering and north to Port Perry and Uxbridge: Oshawa, Whitby, Brooklin, Ajax, Pickering, Courtice, Bowmanville, Newcastle, Orono, Clarington, Port Perry and Uxbridge.
Yes. Bathroom renovations are a core part of Hayes Plumbing & Bathroom Renovations, which has served Durham Region from Oshawa since 1961. We handle everything from tub-to-shower conversions to full custom and accessible washrooms, with financing through Financeit.
448 Ritson Rd. South, Unit 4, Oshawa, ON L1H 5J9. There is no entrance off Ritson Road; access the building from Graburn Avenue. Office hours are Monday to Friday, 8 AM to 4 PM.
Serving Durham Region from Oshawa since 1961
Call or fill out the form for a free estimate.
Contact us today.
Whether it is an emergency or a planned project, we are here to help. Call us or fill out the form and our office will follow up.
Phone
(905) 576-3043
Visit us
448 Ritson Rd. South, Unit 4, Oshawa, ON L1H 5J9
There is no entrance off Ritson Road. Access the building from Graburn Avenue.
Office hours
Monday to Friday, 8:00 AM to 4:00 PM
Emergencies: call any hour