Water Softener Installation in Markham
If you are pricing a water softener installation in Markham, start with the number: Markham tap water measures about 126 mg/L of hardness, roughly 7.4 grains per gallon, which is at the low end of hard. We install softeners sized to that number, and we will tell you when you do not need a $4,000 system, which is more often than door-to-door sellers admit.
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Single-tank softener, installed with bypass and drain: $1,400 to $3,200. Markham water: about 7.4 grains per gallon (the low end of hard). Stouffville: about 18.6 grains per gallon (very hard), where a softener protects tanks and fixtures.
placeholder imageMarkham water, in numbers
Markham's water comes from Lake Ontario, treated in Toronto and Peel, and York Region measured it at about 126 mg/L of hardness in mid-2026, roughly 7.4 grains per gallon (York Region). That is enough to leave white scale on shower glass and kettles. It is not the "extremely hard well water" some sales pitches describe.
Stouffville is different. Its water blends five York Region wells with Lake Ontario supply, and it tested at about 318 mg/L, roughly 18.6 grains per gallon: very hard. If you live in Stouffville, a softener is worth it for your water heater alone. See our Stouffville plumber page.
| Situation | What is included | Typical range |
|---|---|---|
| Single-tank softener, standard home | Unit, bypass valve, drain line, set-up for your hardness | $1,400 to $3,200 |
| Replace an existing softener | Remove old unit, install new on existing loop | Quoted on site |
| New softener loop where none exists | Plumbing a bypass and keeping the kitchen cold tap unsoftened | Quoted on site |
Prices before HST. Last checked: CONFIRM: month and year the prices were last checked, e.g. October 2026.
How we install it
We test your water at the tap first, then size the softener to your hardness and household. The install includes a bypass valve so you can take the softener offline without shutting the house down, a drain line for regeneration, and set-up programmed to your result. We keep the kitchen cold tap on unsoftened water unless you ask otherwise.
Softeners and your water heater
Scale settles in the bottom of a tank and insulates the water from the burner, which costs gas and shortens tank life. Tankless heaters suffer more, because scale coats a small heat exchanger. If you are replacing a hot water tank or going tankless in Stouffville, put the softener in at the same time.
Common questions
Does Markham water need a softener?
It is a comfort choice in most of Markham. At about 7.4 grains per gallon you will see some scale on fixtures and kettles, and tankless heaters need descaling. Many households live with it fine. In Stouffville, at about 18.6 grains per gallon, a softener pays for itself in appliance life.
Should drinking water go through the softener?
We normally leave the kitchen cold tap on unsoftened water. Softening swaps hardness for sodium, and people watching their sodium intake should ask their doctor.
Rent or buy?
Usually buy. Rental softeners bill monthly for years. If you have one now, ask the company for its removal or buyout terms in writing.
How much salt does it use?
It depends on hardness and how much water you use. A softener set for Markham's 7.4 grains uses far less salt than one set for Stouffville's 18.6, which is one reason we program it to your actual test result.