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Mississauga Plumbing CompanyPlumbing, recorded with care.Call (365) 363-9579

Hot water

Tankless Water Heater Installation in Mississauga

A tankless heater heats water only as it flows. The choice is sound when the gas line, venting and household demand all agree with it.

  • You want continuous hot water for back-to-back showers
  • The utility room is small and floor space is valuable
  • You are prepared for annual descaling in hard water
  • The existing gas line can be upgraded if needed
Call now(365) 363-9579

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Sleek minimalist bathroom featuring a modern glass shower and elegant bathtub.
Written note every visit.Cause, fix and parts, dated and left with you.
(365) 363-9579.Phone answered day and night.
  • Licensed plumbers.
  • Written job notes.
  • Phone answered day and night.
  • All of Mississauga.

Is tankless right for you?

  • You want continuous hot water for back-to-back showers
  • The utility room is small and floor space is valuable
  • You are prepared for annual descaling in hard water
  • The existing gas line can be upgraded if needed

How we do the work

  1. Calculate the flow rate required when several fixtures run together, and the lift in temperature from January's cold inlet water.
  2. Check the gas supply. At full output an on-demand heater burns far more gas per hour than a storage tank.
  3. Plan the venting through the wall with approved materials.
  4. Install isolation valves giving access for later flushing.
  5. Connect the condensate drain on condensing units, with neutralisation where required.
  6. Commission and test at full demand.
Winter sizing. Incoming water in January is much colder than in August. A unit sized only on summer conditions will disappoint in winter.

Mississauga homes and this job

Mississauga's moderately hard water means scale is the main enemy of a tankless heater. Regular descaling keeps the heat exchanger efficient and the warranty valid. Homes built in the 1980s with polybutylene supply piping should replace that piping before adding a new appliance; see polybutylene pipe replacement.

What affects the cost

  • Gas line upgrades from the meter
  • Venting length and wall penetrations
  • Condensing versus non-condensing models
  • Water treatment options to reduce scale

For an honest comparison of the two types, read our guide on tank versus tankless. If basement protection is on your list too, review backwater valve care while the plumbing is being updated.

From the bench

Rust-coloured hot water and rumbling from the burner are the tank telling you its liner is going.

On every job

  • Drop cloths down before any tool comes out
  • Water or fuel shut and tagged while we work
  • Every joint we made checked dry before we pack up
  • Old parts shown to you, then hauled away

A call-out, start to finish

  1. 1Call and describe the fixture, floor and symptom
  2. 2We arrive, lay drop cloths and shut the water where needed
  3. 3Trap pulled, line cabled or camera run to find the cause
  4. 4Fix explained, then cut, joined or replaced
  5. 5Water run through, joints checked, written note left

Answers our Mississauga crew gives most

Will I really have endless hot water?

Yes, up to the unit's flow rate. Open too many taps together and the temperature sags.

Is it cheaper to run?

It avoids standby heat loss, but savings depend on usage and gas prices.

How often is descaling needed?

Typically yearly in hard water areas; follow the manufacturer's guidance.

Call now · (365) 363-9579