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Elevate water heater tank

Bangon61

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BC
I'm putting in new hot water tank. I noticed a little rust around base of last one. Would it be OK to put something like hockey pucks under the tank so any moisture or condensation doesn't sit in direct contact with the tank. It would also enable me to see if any puddles are forming under the tank. Just an idea because I see a lot of tanks sitting directly on top of pan and a little rust forming.
 
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Bert_

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NW Iowa
I have used scraps of bin floor because the builder is next door. It's about the best in my opinion. Bricks work ok too.

KIMG2978.JPG
 

manwithtools

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Lebanon, TN
Isn't it a code requirement for a gas WH to be elevated 18"?
Yes, in a garage or other area where flammables might be stored. Some gas heaters are rated for installation at floor level. Bradford White makes one called the Defender. I had a hell of time convincing the moronic home inspector and the plumber they called in on the sale of our last house. They just flatly refused to read the manual or the web site.
 
Last edited:

billconner

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Thousand Islands NYS
Yes, in a garage or other area where flammables might be stored. Some gas heaters are rated for installation at floor level. Bradford White makes one called the Defender. I had a hell of time convincing the moronic home inspector and the plumber they called in in the sale of our last house. They just flatly refused to read the manual or the web site.
This has been discussed here before and iirc all WH made inat least last 10 to 15 years have the design which allows them to sit on garage floor.
 

mike93lx

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Richmond, VA
This has been discussed here before and iirc all WH made inat least last 10 to 15 years have the design which allows them to sit on garage floor.
What is the design to allow it? My WH is elevated and when I take the cover off, I see open flame
 

billconner

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They're called "flammable vapor ignition-resistant" water heaters. Google it. As I read codes there is an exception to them bring elevated 18" in garages. I thought that all gas water heaters produced in last 10-15 years were FVIR. Introduced in 2003. I find sources saying all were FVIR in 2015. Thought it was around 2006 but not finding that citation now.
 

billconner

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previous thread on this:
 

mike93lx

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They're called "flammable vapor ignition-resistant" water heaters. Google it. As I read codes there is an exception to them bring elevated 18" in garages. I thought that all gas water heaters produced in last 10-15 years were FVIR. Introduced in 2003. I find sources saying all were FVIR in 2015. Thought it was around 2006 but not finding that citation now.
Thanks. Mine was installed in 2021, so I'll take a look at this later
 
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niget2002

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Josephine, TX
Well, if that's the case I sure wish plumbers and home inspectors would get the memo...
Last I checked (but I could be wrong), local code requires them to be elevated. It has nothing to do with how the water heater is designed. Mine's an electric water heater and it was still installed 18" off the ground.
 

manwithtools

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Last I checked (but I could be wrong), local code requires them to be elevated. It has nothing to do with how the water heater is designed. Mine's an electric water heater and it was still installed 18" off the ground.
The IRC has an exception for appliances that are listed as flammable vapor ignition-resistant. Local codes could be different I expect.

2024-11-12 100555.jpg
 

archtimb

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Jun 18, 2017
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I'm a fan of elevating, even slightly, all water heaters. If one is to do regular maintenance it makes it possible to drain scale and sediment with a garden hose. Some electric heaters have the valve at the floor level, some so close you can't even get a hose on there, let alone to get it to drain without creating a mess. Heavy forbid you need to try and clear a clog of sediment. Be nice if new heaters came with a ball valve instead of a boiler drain.
 

billconner

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Last I checked (but I could be wrong), local code requires them to be elevated. It has nothing to do with how the water heater is designed. Mine's an electric water heater and it was still installed 18" off the ground.
Don't know what jurisdiction you are in but it seems most of Texas uses either the 2018 or 2021 edition of IRC and both have the FVIR exception. No telling what a local jurisdiction may do.
 

luvtheheat

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Tucson AZ
I put my water heater (one each electric/gas) on a disc of plywood matching the size of the heater.
Works fine.
But I'm in AZ, not BC. YMMV.
 

Dragfluid

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They're called "flammable vapor ignition-resistant" water heaters. Google it. As I read codes there is an exception to them bring elevated 18" in garages. I thought that all gas water heaters produced in last 10-15 years were FVIR. Introduced in 2003. I find sources saying all were FVIR in 2015. Thought it was around 2006 but not finding that citation now.
Is that just for water heaters, or also for hot water heaters?
 

billconner

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Is that just for water heaters, or also for hot water heaters?

I'd say it's for water heaters. Here's the code:

P2801.6 Water heaters installed in garages.
Water heaters having an ignition source shall be elevated such that the source of ignition is not less than 18 inches (457 mm) above the garage floor.

Exception: Elevation of the ignition source is not required for appliances that are listed as flammable vapor ignition-resistant.

And here's the code definition of water heater:

[MP]WATER HEATER. Any heating appliance or equipment that heats potable water and supplies such water to the potable hot water distribution system. For the definition applicable in Chapter 24, see Section G2403.
 

rharman

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75gmck25

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I'm surprised nobody commented about the photo in post #2 having no drip pan and drain under water heater. When it eventually starts to leak, or the pressure relief valve pops, I guess the water runs to a drain somewhere.
 

CoogarXR

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Ohio
The last two I installed in damp basements, I put them on a big concrete paver supported by bricks. That way it has a nice smooth concrete platform, and the bricks allow air to circulate under it to keep it from wicking moisture out of the basement floor. Like this:

1735674787309.png
 

Bert_

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I'm surprised nobody commented about the photo in post #2 having no drip pan and drain under water heater. When it eventually starts to leak, or the pressure relief valve pops, I guess the water runs to a drain somewhere.
Post #2 is my water heater. Really no reason for a pan. If it leaks the water will run over to the floor drain, no big deal.
 

Chuckster in NJ

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Hunterdon County NJ
The last two I installed in damp basements, I put them on a big concrete paver supported by bricks. That way it has a nice smooth concrete platform, and the bricks allow air to circulate under it to keep it from wicking moisture out of the basement floor. Like this:

1735674787309.png
Looks good except the T&P drain pipe is missing……… Pipe must terminate within 6” maximum off the floor.
 
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