
A water heater rarely gives much notice. One morning the shower runs cold, or you go down to the basement and find a spreading puddle under the tank, and a decision you had been putting off for two years needs making before dinner. What you want at that point is hot water back today, a price that does not change halfway through, and confidence you will not be doing this again in three years.
At Reimer, we replace tank and tankless water heaters for homeowners across Buffalo and Erie County, with plumbers working in Rochester, Hamburg, Cheektowaga, Albany, Syracuse and communities throughout Upstate New York. Most residential replacements are a same day job when we have the right unit on the van, so a morning call usually means hot water again by evening.
Here is what you get when you call us about replacing your water heater:
- A 100% satisfaction guarantee on every installation.
- Same day replacement on most residential units.
- Upfront pricing, approved by you before we start.
- The old unit hauled away and your warranty registered.
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Should You Replace With a Tank or Tankless Water Heater?
A storage tank keeps a set volume of water hot and ready to go. A tankless unit heats water as it flows, so it only fires when a tap opens. Both work well in homes across Buffalo and Erie County when they are sized correctly, and both disappoint when they are not.
A conventional tank is usually the better choice when your household demand peaks predictably, when you want the lower upfront cost and a straightforward like-for-like installation, when the existing gas supply and venting can carry the new unit without modification, or when you are replacing in a hurry.
Tankless is usually the better choice when you want continuous hot water rather than a fixed volume that runs out, when floor space is worth reclaiming, when you plan to stay in the house long enough to benefit from a unit that typically lasts twice as long, and when your gas supply can be upsized with a practical route for sidewall venting and a condensate drain.
The installation itself is part of the decision. A tank replacement usually connects to what is already there. A tankless conversion often means upsizing the gas line from half inch to three quarter inch, running a new sidewall vent and adding a condensate drain, which makes it a planned project rather than something to decide at nine at night with no hot water in the house.
How We Size Your Replacement Water Heater
Matching the tank you already have is a reasonable starting point and a poor finishing point. A forty gallon tank that suited two people does not suit a house with teenagers in it, and plenty of the units we replace were sized for a household that moved out years ago.
For a tank, the figure that matters is first hour rating, which combines stored volume with how quickly the burner or elements recover. Two forty gallon tanks with different recovery rates will not give you the same shower on a Monday morning. For a tankless unit, it is flow rate at the temperature rise you actually need, and that rise is far greater here in February than in the manufacturer’s example.
So we ask practical questions: how many showers run back to back on a weekday morning, whether laundry and the dishwasher run at the same time, and whether there is a soaking tub involved. Then we size from the answers rather than from the label on the old unit.
What to Expect on Water Heater Replacement Day
The old unit is drained, isolated, disconnected from water and from gas or power, and carried out. Before the new one goes in, we check what the installation actually needs, because code has moved on since most existing heaters were fitted.
That usually means a temperature and pressure relief discharge line run to a safe termination, a drain pan and drain where the unit sits above finished space, dielectric unions between dissimilar metals, correct vent slope and connection, and a thermal expansion tank where a pressure reducing valve has turned your plumbing into a closed system. Several Erie County towns also require a plumbing permit and inspection on a replacement, and requirements vary from one municipality to the next, so we confirm before the job rather than after.
Then the unit is filled, purged of air, started and leak checked at every joint. You get the temperature set safely, the controls explained, the warranty registered and the old heater taken away.
With the old unit out, we can also see connections that have been hidden for a decade. If we find corroded fittings, a shutoff valve that no longer closes or a supply line on its way out, we show you and quote the plumbing repair before we go any further. Nothing gets added to the bill without your say so.
Water Heater Replacement Across Buffalo, Rochester, Syracuse and Albany
We replace water heaters throughout Buffalo, Cheektowaga, Hamburg, West Seneca, Orchard Park, Tonawanda, Grand Island, Williamsville and Niagara Falls. Our plumbers also cover Rochester, the Finger Lakes, Syracuse, Albany and the Capital Region.
We replace tank and tankless units, gas and electric, and work on every major brand, so what we recommend comes down to what suits your home rather than what we happen to stock. Permit and inspection requirements differ from one town to the next across Erie County, and we handle those as part of the job rather than leaving them with you.
We have branches in Cheektowaga, Hamburg, Rochester, Clifton Park and Brewerton, so the plumber who replaces your water heater works out of a location near you. Our call centre is available 24/7, and we offer Day or Night service when a heater fails outside normal hours, which is usually when it happens.ater flowing year-round.
WE’VE GOT YOU COVERED
Maintenance Plans
Since 1921, our team of Western NY’s top notch service specialists have been serving the area and caring for thousands of customers. At Reimer, we do everything in our power to ensure that your home comfort system works efficiently and effectively every time you turn it on.
- Multi-Point System Inspection
- Calibrate System for Efficiency
- Ensure Proper Airflow
- Maintain System Warranties
- Reduces Unexpected Breakdowns
- Evaluate Filtration & Indoor Air Quality
- Routine Maintenance Leads to Reduced Utility Bills and Extends the Life of your System(s)
Why Homeowners Trust Reimer for Water Heater Replacement
We have been replacing water heaters in this region since 1921, and Buffalo News readers voted us Best of 716 for plumbing in 2025. Behind more than 13,764 Google reviews is a simple pattern: the unit was sized properly, the work was done properly, and the price held.
Every plumber who comes to your door is licensed, certified and background checked, and you approve the price before we start. Because we run plumbing and heating under one roof, a replacement that turns out to involve a shared chimney or a furnace flue stays with one company instead of becoming two appointments with a gap in between.
Every replacement is backed by our 100% satisfaction guarantee, and our water heater maintenance keeps the new unit running the way it should.
Schedule a Water Heater Replacement with Reimer Today
A failing water heater does not improve on its own, and a tank that has started to weep will eventually let go. We will tell you whether it needs replacing or repairing, quote it upfront, and in most cases have hot water back the same day.
Call Reimer at (716) 272-2371 to schedule your water heater replacement in Buffalo, Erie County or anywhere across our Upstate New York service area, or book online and we will confirm your arrival window. If there is water pooling under your tank right now, shut off the supply to the heater if you can reach the valve safely and tell us when you call.
Water Heater Replacement FAQ
How long does a water heater replacement take?
A like-for-like tank replacement is usually two to four hours, and you have hot water again the same day. Switching to tankless takes longer, generally a full day, because it involves gas line work, new venting and a condensate drain.
How long should a water heater last?
A conventional tank typically runs eight to twelve years in this region. Tankless units commonly last twenty or more with descaling maintenance, which is worth weighing when the two prices look far apart.
Do I need a permit to replace a water heater?
Many municipalities across Erie County require a plumbing permit and an inspection for a replacement, and the rules differ from one town to the next. We confirm what applies at your address, pull the permit and meet the inspector as part of the job.
Will you take the old water heater away?
Yes. Draining, disconnecting, removing and disposing of the old unit is part of every replacement we carry out.
Can you replace both gas and electric water heaters?
Yes, tank and tankless, gas and electric, across every major brand. Which options are open to your home depends on the existing gas supply, the electrical capacity and the venting route.
My tank is leaking. Should I turn anything off?
Shut off the cold water supply valve above the heater if you can reach it safely, and switch off the gas or the breaker to the unit. Then call us. That stops the tank refilling while you wait and limits how much water ends up on the floor.
Over
100YEARS OF
EXPERIENCE
Air Conditioning, Heating & Plumbing Repair in Buffalo, New York.
For decades, local homeowners have trusted the team at Reimer Home Services with all their home service needs. We’re your HVAC company in Buffalo. We’re your plumbers here in Western New York. Above all else, we’re here for you and your home.
You can count on our team to be there when you need us. In fact, we’re available Day or Night. Your home’s problems can’t wait, and neither should you. Call us and let us know how our plumbers and techs can help.







We’re your local home services team…
We’re here for local homeowners.
Proud to serve Buffalo and Erie County.
From Buffalo to Albany and all points in between, we’re your local heating, cooling, and plumbing pros. No matter where you live in Erie County and surrounding New York communities, you can count on Reimer Heating, Cooling & Plumbing to be there for your home with our fast, Day or Night service.
Click the link below to see all the communities we serve, and to contact us for service.
Our plumbers fix it all.
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