Water Heater Repair & Installation Mississauga and Surrounding Areas

Water Heater Problems?

Have you ever gotten up in the morning and went to jump in the shower only to realize that there is no hot water? A broken water heater can disrupt your entire daily routine so we understand how urgent it is to have it repaired quickly.

There are several reasons why your water heater may have stopped working such as malfunctioning parts like the heating element, or thermostat, corrosion inside the tank, leaks, or sediment buildup. If your water heater unit has failed entirely, is producing inconsistent temperatures, or is leaking, Bos Plumbing and Drains can get it up and running again!

Water Heater Repair Professionals

BOS Plumbing and Drains  has reliable and fast service for water heater repairs and replacements. If your water heater has stopped working completely or is showing signs of malfunction, you should have it inspected right away. Delaying service can create larger problems like increased energy bills, water damage, or even safety risks.  We are always honest with our diagnosis and will provide you with the best solution to guarantee long-lasting results.

 

No hot water? Don’t wait. At BOS Plumbing and Drains, we’ve been fixing, installing, and replacing water heaters for homeowners and businesses across the region for over 20 years. Whether it’s an emergency water heater repair near me, a professional tankless water heater install, or a full hot water tank replacement  our licensed plumbers arrive fast, diagnose accurately, and get your hot water back where it belongs.

 

What Sets BOS Apart:

  • 20+ years of hands-on water heater expertise
  • Licensed, insured & certified plumbers
  • 100% upfront pricing  zero hidden fees
  • Same-day and emergency appointments available
  • Full warranty on all parts and labour
  • We service all major brands and models

24/7 Emergency Water Heater Repair Near You 

Hot water problems rarely happen at a convenient time. Whether it’s early morning or late at night, BOS provides 24/7 emergency water heater repair near me services across the GTA.
A failing water heater tank can quickly escalate into leaks, flooding, or complete system breakdown. That’s why our team responds quickly with fully equipped service vehicles to diagnose and fix the issue on the spot.

Common Water Heater Problems We Fix:

  • No hot water or fluctuating temperatures
  • Leaking or cracked hot water tank
  • Discoloured or rusty water output
  • Rumbling or banging sounds from the water heater tank (sediment buildup)
  • Low water pressure affecting hot water flow
  • Faulty thermostat, heating elements, or ignition system

We focus on accurate diagnostics first so you don’t waste money on temporary fixes.

Our Full Range of Water Heater Services 

BOS Plumbing and Drains is your one-stop shop for everything related to your home’s hot water system. From a simple water heater repair to a complete system upgrade with a new tankless water heater we do it all, and we do it right.

1. Fast & Reliable Water Heater Repair 

A broken hot water heater doesn’t just mean cold showers it disrupts your entire household routine. Our experienced technicians diagnose and fix both gas and electric units on the same visit whenever possible. We identify the root cause of the failure, not just the symptom, so the repair lasts.

Common problems we repair:

  • No hot water or lukewarm water
  • Hot water running out too quickly
  • Water leaking from tank, connections, or the pressure relief valve
  • Strange noises rumbling, banging, popping, or hissing
  • Pilot light or ignition failures on gas units
  • Discoloured, rusty, or foul-smelling water
  • Tripped reset buttons or electrical component failures
  • Thermostat malfunctions causing overheating or underheating
  • Low water pressure from the hot water side

Parts our technicians replace during repairs:

  • Heating elements & thermostats (electric units)
  • Thermocouples & gas valves (gas units)
  • Anode rods & dip tubes
  • Pressure relief valves & expansion tanks
  • Control boards & temperature sensors
  • Heat exchangers (tankless units)
  • Inlet water filters & flow sensors

Every water heater repair at BOS includes a full inspection of related components because we believe in fixing the problem completely, not just patching it.

2. Water Heater Installation Service Mississauga 

Whether you’re building a new home, upgrading your system, or replacing a failed unit, proper water heater installation is critical to long-term performance and safety. Improper installation is one of the leading causes of premature water heater failure which is exactly why you should trust licensed professionals with 20+ years of experience.

Our professional installation process:

Step 1 Needs Assessment: We assess the needs of your household in terms of hot water needs, existing plumbing, and gas or electric infrastructure. We assist you in selecting the appropriate type of unit, the type of fuel, and its size to ensure that you do not run out of hot water and do not waste your money in buying a larger unit than that which you require.

Step 2 Safe Removal of the Old Unit: Our crew will disconnect and safely remove your current hot water tank or water heater tank in accordance with all the codes and with the environmental disposal standards.

Step 3 Installation Area Preparation: We get your area ready to accept your new unit cleaning the area, checking the proper ventilation and clearances, making needed upgrades, and making sure all local building codes are met.

Step 4 Precision Installation: Your new tankless water heater or a water heater tank or tankless water heater is installed with attention to detail. All plumbing, gas and electrical connections are done correctly, the thermostat is adjusted, the pressure relief valve mounted and tested, and the unit anchored and vented.

Step 5 Full System Testing: Prior to the packing process, we will put your new unit through full operational tests checking any leaks, ensuring output temperature, all safety devices, and ensuring that the system is within manufacturer performance specifications.
Step 6 Walkthrough & Education: We take you through your new system on how to turn the thermostat to the right temperature, what the indicators of trouble are like, and how to maintain your unit in efficient operation for many more years to come.

3. Water Heater Replacement Service

Does your old fashioned hot water tank keep on failing? Does the price of water heater repairs begin to exceed the price of the unit itself? A water heater replacement may be necessary.

In BOS Plumbing and Drains, we simplify the process of replacing water heater units and make it a hassle-free process. We will evaluate your existing system fairly, assist you with comparing the replacement water heater models that meet your financial means and requirements and handle the changeover in the most efficient manner often in one visit.

When to choose replacement over repair:

  • Your unit is 10 or more years old
  • You’ve needed multiple repairs in the past two years
  • The repair cost exceeds 40–50% of the cost of a new unit
  • Your energy bills have risen significantly
  • The tank is showing rust, corrosion, or persistent leaks
  • Your household’s hot water needs have grown (new family members, addition, renovation)

We assist you to select the appropriate replacement: Conventional water heater tank, hot water tank with increased capacity or energy efficient tankless water heater. Regardless of which way you choose to take, BOS does the entire water heater replacement process.

4. Tankless Water Heater Installation 

Considering the move? Tankless water heaters also known as waterless tank heaters or on-demand water heaters are the future of residential hot water. A tankless water heater does not heat and reheat a large, stored tank of water but instead, it heats and only turns on when you turn on a hot tap that provides you with an inexhaustible, continuous flow of hot water at the point you need it.

BOS Plumbing and Drains has extensive experience in installing tankless water heaters, both gaseous (natural gas and propane) and electric, in all the major brands.

Advantages of upgrading to a tankless water heater:

  • Endless hot water no more running out mid-shower
  • Energy savings up to 30–40% reduction in water heating costs
  • Longer lifespan 15–20 years vs. 8–12 for traditional tanks
  • Space savings compact, wall-mounted units free up valuable floor space
  • Reduced risk of tank leaks no large stored water volume to rupture
  • Better water quality no stagnant stored water; always fresh on demand
  • Higher resale value energy-efficient upgrades are attractive to buyers

What our tankless water heater install includes:

  • Home assessment for gas line or electrical panel capacity
  • Unit sizing based on your household’s peak demand
  • Safe removal of existing hot water tank
  • Full installation to manufacturer and code specifications
  • Venting and gas line or electrical upgrades if required
  • Complete testing and commissioning
  • Warranty registration and homeowner walkthrough

If you’ve been searching for a tankless water heater install near me, BOS Plumbing and Drains delivers the expertise and care your home deserves.

Tank vs. Tankless: Which Water Heater Is Right for You? 

Among the questions we constantly hear is: Should I use a regular hot water tank or should I upgrade and use a tankless water heater? The truthful answer is it will depend on your home, your money, and your long-term objectives. The following is a breakdown of its clear form:

FactorTraditional Hot Water TankTankless Water Heater
Upfront CostLowerHigher
Operating CostHigher (standby heat loss)Lower (on-demand only)
Hot Water SupplyLimited by tank capacityUnlimited on demand
Lifespan8–12 years15–20 years
Space RequiredLarge floor footprintCompact, wall-mounted
Installation ComplexityStandardModerate (may need upgrades)
Energy EfficiencyStandardHigh
Best ForBudget-conscious installs, larger families with consistent usageLong-term savings, smaller households, eco-conscious homeowners


Not sure which is right for you? Our technicians will walk you through a no-pressure assessment during your appointment and give you an honest recommendation based on your actual situation.

Why More GTA Homeowners Are Switching to Tankless Water Heaters 

In the GTA, the number of homeowners that are replacing their old systems of water heater tanks with new models of tankless water heaters that are energy efficient is on the rise. As utility rates go up and more people seek up to date plumbing systems, tankless units are proving to be a good long term investment to many families.

A tankless water heater will heat only the amount of water required, thereby saving money on monthly energy bills due to less standby heat loss. It is also suitable in busy families, where several showers, laundry, and dishwashing processes must occur all day long because it offers an unlimited amount of hot water. Tankless systems are small devices, unlike bulky hot water tanks that are mounted to the wall, which can help release space in the basement or utility room.

The professional tankless water heater install is also an option of many homeowners since these types of systems tend to outlive most traditional tanks, and the chances of having a sudden leak or flood out of a tank are minimized. In case you are not sure that switching is the right choice to your property, BOS Plumbing & Drains can evaluate your home, use requirements and budget and advise you on the best option.

Water Heater Fuel Types Explained 

One of the major choices when it comes to water heater installation or replacement water heater is fuel type. BOS Plumbing and Drains installs and repairs units of all types of fuel:

1. Natural Gas Water Heaters 

The most widespread option in Canada. Gas water heater tank and tankless water heater units are fast to heat water and tend to be cheaper to use in comparison to electric counterparts. These need to be well vented and connected to a gas line.

2. Electric Water Heaters

Electric units are also less complicated to install (no venting is needed) and a good choice in areas which may not have gas lines. Electric tankless water heater models are highly efficient in energy consumption although the operating costs are usually high.

3. Propane Water Heaters 

Like natural gas, propane units are suitable to rural properties or homes not linked to municipal gas lines. BOS deals with water heaters installation and water heater repair of both tank and tankless water heaters.

4. Heat Pump Water Heaters 

The heat pump water heaters use the thermal energy in the air around them to heat water, which is why they are also one of the most energy-efficient. They adapt well in mid temperatures and areas that are well ventilated. Our team will be able to recommend whether it will fit in your house.

What Size Water Heater Do You Need? 

It is just as important to get the correct size unit as it is to get the correct type. A small unit will leave your family with insufficient hot water; a large unit will use more energy and money. A rough guide to the size of a conventional water heater tank:

Household SizeRecommended Tank Capacity
1–2 people30–40 gallons
3–4 people40–50 gallons
5–6 people50–60 gallons
6+ people60–80 gallons


The size of tankless water heaters is calculated by the number of parallel hot water outlets and the necessary flow rate (in gallons per minute / GPM). This calculation is done on your behalf by our technicians in the assessment ensuring that your tankless water heater install is exactly right to your home demand.

What Causes Water Heater Problems? And How to Prevent Them 

Since our team has been repairing water heaters near me for over 20+ years, we know the exact reasons as to why most water heaters fail and more importantly how to repair them.

Sediment & Mineral Buildup 

The calcium and magnesium deposited in your water heater tank at the bottom of the tank create an insulating layer that makes the heating element in your water heater work harder. In the long run, this will result in overheating, loss of efficiency and early breakdown.
Prevention: Flushing of tanks annually and in hard water regions, installation of a water softener.

Anode Rod Failure 

A sacrificial metal rod within your hot water tank is the anode rod which captures corrosive minerals and shields the lining of the tank. When empty, it corrodes internally, causing the tank to corrode.
Prevention: Anode rod inspections and replacement every 3-5 years.

High or Fluctuating Water Pressure

High water pressure (more than 80 PSI) puts a strain on your water heater tank, connection and pressure relief valve which hastens its wear and creates leakages.
Prevention: A pressure-reducing valve (PRV) may be installed in case the pressure in your house is always higher than it should be.

Improper Original Installation 

Most of the water heater repair calls that we get are related to improper initial installation, improper venting, undersized gas lines, loose connections, or non-compliant installations. These problems result in frequent failures and may be safety risks.
Prevention: Have a licensed plumber install the water heater at the very beginning.

Lack of Routine Maintenance

A majority of the homeowners do not service their water heater tank until it breaks. Small problems can be identified during annual or biannual inspections: a weakening component, a corroding joint, a broken thermostat before they cost a lot to fix. BOS Plumbing and Drains can provide maintenance visits to ensure that your system is operating efficiently.

Age-Related Wear

The design life of traditional hot water tank units is 8-12 years. Tankless water heater systems last 15–20 years with proper maintenance. When your unit is nearing or has already exceeded the life-span that it is supposed to have, then replacing the water heater parts is just a temporary solution to a permanent problem. By that time, it is wiser to replace the water heater for financial consideration.

Warning Signs You Need Water Heater Repair Immediately

Your hot water heater will usually give you warning signs before it completely fails. Catching these early can mean the difference between a simple water heater repair and an expensive emergency replacement.

Call us immediately if you notice:

  • Water pooling around the base of the unit (potential tank failure or serious leak)
  • A rotten egg smell near a gas water heater (possible gas leak evacuate and call immediately)
  • The pressure relief valve continuously releasing water (dangerously high pressure)
  • Completely brown or rust-coloured hot water (advanced internal corrosion)
  • Any signs of CO (carbon monoxide) near a gas unit dizziness, nausea, headache

Schedule a service call soon if you notice:

  • Significantly reduced hot water supply or duration
  • Water taking longer than usual to reach temperature
  • Unusual noises during heating cycles
  • Visible moisture, dripping, or minor weeping around connections
  • Fluctuating water temperatures from hot taps
  • Unexplained increases in your gas or electricity bills

Whether it’s urgent or just something that’s been nagging at you calling BOS Plumbing and Drains early almost always saves you money and prevents bigger problems down the road.

Water Heater Brands We Repair & Install in Canada 

BOS Plumbing & Drains has over 20+ years of experience with all brands of water heaters in Canada. For water heater repair on an old water heater or water heater replacement we work with:

Tank Water Heaters: Rheem, Bradford White, AO Smith, Giant, GSW, John Wood, Whirlpool, American Standard, Richmond

Tankless Water Heaters: Navien, Rinnai, Noritz, Bosch, Takagi, EcoSmart, Rheem, Bradford White, Stiebel Eltron, Atmor

Don’t see your brand listed? Call us anyway with 20+ years in the field, our technicians have worked on virtually every unit on the market.

Maintenance Tips to Extend Your Water Heater’s Life

A well-maintained water heater tank or tankless water heater can last significantly longer than average. Here are the expert maintenance tips our plumbers share with every customer:

For Traditional Tank Water Heaters:

  • Flush the tank annually to remove sediment buildup and protect heating elements
  • Check the anode rod every 3 years; replace it when more than 50% depleted
  • Test the pressure relief valve annually by lifting the lever briefly if it doesn’t release water and reseal, it needs replacement
  • Insulate the first 2 feet of hot and cold water pipes connected to the unit to reduce heat loss
  • Set the thermostat to 49°C (120°F) hot enough to prevent bacterial growth, cool enough to prevent scalding and reduce energy use
  • Inspect connections and fittings for any sign of corrosion, dripping, or mineral buildup

For Tankless Water Heaters:

  • Descale the heat exchanger annually especially in hard water areas to maintain efficiency and flow rate
  • Clean the inlet water filter regularly to prevent flow restrictions
  • Check venting connections for blockages or deterioration
  • Test the flow sensor and temperature controls periodically
  • Have a licensed technician perform a full annual service BOS Plumbing and Drains offers scheduled maintenance visits

Following these steps dramatically reduces water heater repair calls and extends the life of your investment by years.

Water Heater Services Near You in the GTA 

For reliable water heater repair or professional water heater installation, it’s essential to partner with a local plumbing company. BOS Plumbing & Drains proudly provides fast and friendly service to homes and businesses across the GTA with licensed technicians and 20+ years of experience. Our same-day and emergency water heater services are available in Mississauga, Oakville, Hamilton, Milton, Burlington, Niagara Region and more.

We know what problems are common in local homes from hard water deposits to old hot water systems, to issues that arise during the winter, and older homes with unreliable plumbing connections. If you’re in need of water heater repair, water heater replacement, or installation of a new tankless water heater, BOS has the right solution to suit the Canadian climate.

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