Cost to replace a Water Heater

This pricing ONLY applies if the replacement is done on the first visit.  If you would prefer to have an estimate prior to having the work done there is a charge of $49 to cover the additional time your job will require.

*The following pricing only applies to houses built after the 1970’s. Many older homes will have atmospheric water heaters venting into a Masonry Chimney. In most cases a Flue Liner must be installed prior to installing a new water heater. (We recommend KC Chimney Service)

Another option is to install a Power Vent model that would vent out the side of the house by a fan induced motor. Power Vents have a wide range of options with increased efficiency and performance. A power vent installation will range in price from $1750-$2500. Tankless starts out at $2800 and will require $49 inspection and recommendation report, we really don’t do many tankless installs.

Pricing on Standard Gas Water Heaters

$1035-$1085 40 Gallon Atmospheric Bradford White RG240T6N

$1045-$1085 50 Gallon Atmospheric Bradford White RG250T6N

Incorrectly vented water heater Professional water heater install

  • Replacing Saddle Valves near water heater connection
  • New 3/4″ Ball Valve Installed
  • Gas shutoff (if needed)
  • Drip leg (if needed)
  • Old tank hauled away and removed
  • Copper Pipe Connections
  • 2 year full labor warranty, covering all parts and labor without limitation
  • .62EF
  • 40,000 BTU burner
  • 88 ga First Hour Rating on 50 gal
  • 242 therms per year

System Upgrades

The system upgrades allow you to “set it and forget it”. We don’t want to come back out the following year to “calibrate” your expansion tank, flush your tank, or inspect your system. In fact you don’t have to do any maintenance at all to have the full warranty.

$100 – $125 Pressure Reducing Valve


A Pressure Reducing Valve protects every appliance in your house. Typically when the PRV goes bad first then the water heater starts to leak.

The PRV is recommended on nearly every new installation, the cost is usually determined by the ease of access.

If the  water pressure is above 80 psi a PRV is required. The PRV will help reduce the maintenance required for a Thermal Expansion Tank.

$60 – $80 Thermal Expansion Tank


A Thermal Expansion tank is required by all Manufacturers on all Closed Loop systems. A closed loop is created when there is a check valve in the water meter or a PRV in the system. The expansion tank should be calibrated to match the water pressure and will absorb additional volume that can accumulate from Thermal Expansion.

A 2 gallon expansion tank is used on most installs. However if you have a check valve in the water meter or excessive pressure on the city side, a 4 gallon expansion tank can be installed for the additional $20.

$25 – $85 Venting Upgrade water heater & furnace



Many of the water heaters installed for new construction were not sized in accordance with Fuel Gas Requirements which may increase the chance of backdrafting.

If you have a 40,000 BTU atmospheric water heater common vented with a furnace there should usually be a 4″ vent installed. Typically the wye need to be replaced and its easier to replace the furnace vent in the process. Give your existing vent a squeeze when it’s not hot, you should be able to tell if the pipe is corroding from the inside out.

When adding a 4″ vent and connector rise to the new unit the furnace vent may also be replaced. Usually to replace the entire venting for the furnace and water heater it would add about $70.

Total Price $1025-$1285 for a Professionally installed Bradford White, American Made, 40,000 BTU Atmospheric Water Heater 

A discount of up to $30 will be applied to customers paying by check rather than Credit Card.

We can also install 36,000 BTU Rheem or 38,000 BTU Ruud installations that start out at $965 and do not include any labor warranty from KC Water Heaters. 

If you would like to schedule an install we can usually get you scheduled within a day or two. Install times are 9:00am  around 1:00pm and usually take around 3 hours.

You may book an appointment through email at or you can call the answering service at (913) 962-7000 and provide your address and request to get on the schedule for a call back.

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